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2014-04-07rapidio: rework device hierarchy and introduce mport class of devicesAlexandre Bounine
This patch removes an artificial RapidIO bus root device and establishes actual device hierarchy by providing reference to real parent devices. It also introduces device class for RapidIO controller devices (on-chip or an eternal bridge, known as "mport"). Existing implementation was sufficient for SoC-based platforms that have a single RapidIO controller. With introduction of devices using multiple RapidIO controllers and PCIe-to-RapidIO bridges the old scheme is very limiting or does not work at all. The implemented changes allow to properly reference platform's local RapidIO mport devices and provide device details needed for upper layers. This change to RapidIO device hierarchy does not break any known existing kernel or user space interfaces. Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Li Yang <leoli@freescale.com> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com> Cc: Stef van Os <stef.van.os@prodrive-technologies.com> Cc: Jerry Jacobs <jerry.jacobs@prodrive-technologies.com> Cc: Arno Tiemersma <arno.tiemersma@prodrive-technologies.com> Cc: Rob Landley <rob@landley.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07idr: remove dead codeStephen Hemminger
Remove no longer used deprecated code, and make local functions static. Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Acked-by: Jean Delvare <jdelvare@suse.de> Acked-by: Tejun Heo <tj@kernel.org> Cc: Jeff Layton <jlayton@redhat.com> Cc: Philipp Reisner <philipp.reisner@linbit.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: George Spelvin <linux@horizon.com> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07include/linux/crash_dump.h: add vmcore_cleanup() prototypeRashika Kheria
Eliminate the following warning in proc/vmcore.c: fs/proc/vmcore.c:1088:6: warning: no previous prototype for `vmcore_cleanup' [-Wmissing-prototypes] [akpm@linux-foundation.org: clean up powerpc, remove unneeded EXPORT_SYMBOL] Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07wait: swap EXIT_ZOMBIE and EXIT_DEAD to hide EXIT_TRACE from user-spaceOleg Nesterov
get_task_state() uses the most significant bit to report the state to user-space, this means that EXIT_ZOMBIE->EXIT_TRACE->EXIT_DEAD transition can be noticed via /proc as Z -> X -> Z change. Note that this was possible even before EXIT_TRACE was introduced. This is not really bad but imho it make sense to hide EXIT_TRACE from user-space completely. So the patch simply swaps EXIT_ZOMBIE and EXIT_DEAD, this way EXIT_TRACE will be seen as EXIT_ZOMBIE by user-space. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Jan Kratochvil <jan.kratochvil@redhat.com> Cc: Michal Schmidt <mschmidt@redhat.com> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: Lennart Poettering <lpoetter@redhat.com> Cc: Roland McGrath <roland@hack.frob.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07wait: introduce EXIT_TRACE to avoid the racy EXIT_DEAD->EXIT_ZOMBIE transitionOleg Nesterov
wait_task_zombie() first does EXIT_ZOMBIE->EXIT_DEAD transition and drops tasklist_lock. If this task is not the natural child and it is traced, we change its state back to EXIT_ZOMBIE for ->real_parent. The last transition is racy, this is even documented in 50b8d257486a "ptrace: partially fix the do_wait(WEXITED) vs EXIT_DEAD->EXIT_ZOMBIE race". wait_consider_task() tries to detect this transition and clear ->notask_error but we can't rely on ptrace_reparented(), debugger can exit and do ptrace_unlink() before its sub-thread sets EXIT_ZOMBIE. And there is another problem which were missed before: this transition can also race with reparent_leader() which doesn't reset >exit_signal if EXIT_DEAD, assuming that this task must be reaped by someone else. So the tracee can be re-parented with ->exit_signal != SIGCHLD, and if /sbin/init doesn't use __WALL it becomes unreapable. This was fixed by the previous commit, but it was the temporary hack. 1. Add the new exit_state, EXIT_TRACE. It means that the task is the traced zombie, debugger is going to detach and notify its natural parent. This new state is actually EXIT_ZOMBIE | EXIT_DEAD. This way we can avoid the changes in proc/kgdb code, get_task_state() still reports "X (dead)" in this case. Note: with or without this change userspace can see Z -> X -> Z transition. Not really bad, but probably makes sense to fix. 2. Change wait_task_zombie() to use EXIT_TRACE instead of EXIT_DEAD if we need to notify the ->real_parent. 3. Revert the previous hack in reparent_leader(), now that EXIT_DEAD is always the final state we can safely ignore such a task. 4. Change wait_consider_task() to check EXIT_TRACE separately and kill the racy and no longer needed ptrace_reparented() case. If ptrace == T an EXIT_TRACE thread should be simply ignored, the owner of this state is going to ptrace_unlink() this task. We can pretend that it was already removed from ->ptraced list. Otherwise we should skip this thread too but clear ->notask_error, we must be the natural parent and debugger is going to untrace and notify us. IOW, this doesn't differ from "EXIT_ZOMBIE && p->ptrace" even if the task was already untraced. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Reported-by: Jan Kratochvil <jan.kratochvil@redhat.com> Reported-by: Michal Schmidt <mschmidt@redhat.com> Tested-by: Michal Schmidt <mschmidt@redhat.com> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: Lennart Poettering <lpoetter@redhat.com> Cc: Roland McGrath <roland@hack.frob.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07exec: kill bprm->tcomm[], simplify the "basename" logicOleg Nesterov
Starting from commit c4ad8f98bef7 ("execve: use 'struct filename *' for executable name passing") bprm->filename can not go away after flush_old_exec(), so we do not need to save the binary name in bprm->tcomm[] added by 96e02d158678 ("exec: fix use-after-free bug in setup_new_exec()"). And there was never need for filename_to_taskname-like code, we can simply do set_task_comm(kbasename(filename). This patch has to change set_task_comm() and trace_task_rename() to accept "const char *", but I think this change is also good. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07numa: use LAST_CPUPID_SHIFT to calculate LAST_CPUPID_MASKSrikar Dronamraju
LAST_CPUPID_MASK is calculated using LAST_CPUPID_WIDTH. However LAST_CPUPID_WIDTH itself can be 0. (when LAST_CPUPID_NOT_IN_PAGE_FLAGS is set). In such a case LAST_CPUPID_MASK turns out to be 0. But with recent commit 1ae71d0319: (mm: numa: bugfix for LAST_CPUPID_NOT_IN_PAGE_FLAGS) if LAST_CPUPID_MASK is 0, page_cpupid_xchg_last() and page_cpupid_reset_last() causes page->_last_cpupid to be set to 0. This causes performance regression. Its almost as if numa_balancing is off. Fix LAST_CPUPID_MASK by using LAST_CPUPID_SHIFT instead of LAST_CPUPID_WIDTH. Some performance numbers and perf stats with and without the fix. (3.14-rc6) ---------- numa01 Performance counter stats for '/usr/bin/time -f %e %S %U %c %w -o start_bench.out -a ./numa01': 12,27,462 cs [100.00%] 2,41,957 migrations [100.00%] 1,68,01,713 faults [100.00%] 7,99,35,29,041 cache-misses 98,808 migrate:mm_migrate_pages [100.00%] 1407.690148814 seconds time elapsed numa02 Performance counter stats for '/usr/bin/time -f %e %S %U %c %w -o start_bench.out -a ./numa02': 63,065 cs [100.00%] 14,364 migrations [100.00%] 2,08,118 faults [100.00%] 25,32,59,404 cache-misses 12 migrate:mm_migrate_pages [100.00%] 63.840827219 seconds time elapsed (3.14-rc6 with fix) ------------------- numa01 Performance counter stats for '/usr/bin/time -f %e %S %U %c %w -o start_bench.out -a ./numa01': 9,68,911 cs [100.00%] 1,01,414 migrations [100.00%] 88,38,697 faults [100.00%] 4,42,92,51,042 cache-misses 4,25,060 migrate:mm_migrate_pages [100.00%] 685.965331189 seconds time elapsed numa02 Performance counter stats for '/usr/bin/time -f %e %S %U %c %w -o start_bench.out -a ./numa02': 17,543 cs [100.00%] 2,962 migrations [100.00%] 1,17,843 faults [100.00%] 11,80,61,644 cache-misses 12,358 migrate:mm_migrate_pages [100.00%] 20.380132343 seconds time elapsed Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Cc: Liu Ping Fan <pingfank@linux.vnet.ibm.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07madvise: correct the comment of MADV_DODUMP flagZhang Yanfei
s/MADV_NODUMP/MADV_DONTDUMP/ Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07mm/readahead.c: inline ra_submitFabian Frederick
Commit f9acc8c7b35a ("readahead: sanify file_ra_state names") left ra_submit with a single function call. Move ra_submit to internal.h and inline it to save some stack. Thanks to Andrew Morton for commenting different versions. Signed-off-by: Fabian Frederick <fabf@skynet.be> Suggested-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07mm: remove unused arg of set_page_dirty_balance()Miklos Szeredi
There's only one caller of set_page_dirty_balance() and that will call it with page_mkwrite == 0. The page_mkwrite argument was unused since commit b827e496c893 "mm: close page_mkwrite races". Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07memcg: rename high level charging functionsMichal Hocko
mem_cgroup_newpage_charge is used only for charging anonymous memory so it is better to rename it to mem_cgroup_charge_anon. mem_cgroup_cache_charge is used for file backed memory so rename it to mem_cgroup_charge_file. Signed-off-by: Michal Hocko <mhocko@suse.cz> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07memcg: get_mem_cgroup_from_mm()Johannes Weiner
Instead of returning NULL from try_get_mem_cgroup_from_mm() when the mm owner is exiting, just return root_mem_cgroup. This makes sense for all callsites and gets rid of some of them having to fallback manually. [fengguang.wu@intel.com: fix warnings] Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Acked-by: Michal Hocko <mhocko@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07mm: use 'const char *' insted of 'char *' for reason in dump_page()Kirill A. Shutemov
I tried to use 'dump_page(page, __func__)' for debugging, but it triggers warning: warning: passing argument 2 of `dump_page' discards `const' qualifier from pointer target type [enabled by default] Let's convert 'reason' to 'const char *' in dump_page() and friends: we shouldn't modify it anyway. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07res_counter: remove interface for locked charging and unchargingDavid Rientjes
The res_counter_{charge,uncharge}_locked() variants are not used in the kernel outside of the resource counter code itself, so remove the interface. Signed-off-by: David Rientjes <rientjes@google.com> Acked-by: Michal Hocko <mhocko@suse.cz> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Tejun Heo <tj@kernel.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Jianguo Wu <wujianguo@huawei.com> Cc: Tim Hockin <thockin@google.com> Cc: Christoph Lameter <cl@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07mm, mempolicy: remove per-process flagDavid Rientjes
PF_MEMPOLICY is an unnecessary optimization for CONFIG_SLAB users. There's no significant performance degradation to checking current->mempolicy rather than current->flags & PF_MEMPOLICY in the allocation path, especially since this is considered unlikely(). Running TCP_RR with netperf-2.4.5 through localhost on 16 cpu machine with 64GB of memory and without a mempolicy: threads before after 16 1249409 1244487 32 1281786 1246783 48 1239175 1239138 64 1244642 1241841 80 1244346 1248918 96 1266436 1254316 112 1307398 1312135 128 1327607 1326502 Per-process flags are a scarce resource so we should free them up whenever possible and make them available. We'll be using it shortly for memcg oom reserves. Signed-off-by: David Rientjes <rientjes@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Tejun Heo <tj@kernel.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Jianguo Wu <wujianguo@huawei.com> Cc: Tim Hockin <thockin@google.com> Cc: Christoph Lameter <cl@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07mm, mempolicy: rename slab_node for clarityDavid Rientjes
slab_node() is actually a mempolicy function, so rename it to mempolicy_slab_node() to make it clearer that it used for processes with mempolicies. At the same time, cleanup its code by saving numa_mem_id() in a local variable (since we require a node with memory, not just any node) and remove an obsolete comment that assumes the mempolicy is actually passed into the function. Signed-off-by: David Rientjes <rientjes@google.com> Acked-by: Christoph Lameter <cl@linux.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Tejun Heo <tj@kernel.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Jianguo Wu <wujianguo@huawei.com> Cc: Tim Hockin <thockin@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07mm: per-thread vma cachingDavidlohr Bueso
This patch is a continuation of efforts trying to optimize find_vma(), avoiding potentially expensive rbtree walks to locate a vma upon faults. The original approach (https://lkml.org/lkml/2013/11/1/410), where the largest vma was also cached, ended up being too specific and random, thus further comparison with other approaches were needed. There are two things to consider when dealing with this, the cache hit rate and the latency of find_vma(). Improving the hit-rate does not necessarily translate in finding the vma any faster, as the overhead of any fancy caching schemes can be too high to consider. We currently cache the last used vma for the whole address space, which provides a nice optimization, reducing the total cycles in find_vma() by up to 250%, for workloads with good locality. On the other hand, this simple scheme is pretty much useless for workloads with poor locality. Analyzing ebizzy runs shows that, no matter how many threads are running, the mmap_cache hit rate is less than 2%, and in many situations below 1%. The proposed approach is to replace this scheme with a small per-thread cache, maximizing hit rates at a very low maintenance cost. Invalidations are performed by simply bumping up a 32-bit sequence number. The only expensive operation is in the rare case of a seq number overflow, where all caches that share the same address space are flushed. Upon a miss, the proposed replacement policy is based on the page number that contains the virtual address in question. Concretely, the following results are seen on an 80 core, 8 socket x86-64 box: 1) System bootup: Most programs are single threaded, so the per-thread scheme does improve ~50% hit rate by just adding a few more slots to the cache. +----------------+----------+------------------+ | caching scheme | hit-rate | cycles (billion) | +----------------+----------+------------------+ | baseline | 50.61% | 19.90 | | patched | 73.45% | 13.58 | +----------------+----------+------------------+ 2) Kernel build: This one is already pretty good with the current approach as we're dealing with good locality. +----------------+----------+------------------+ | caching scheme | hit-rate | cycles (billion) | +----------------+----------+------------------+ | baseline | 75.28% | 11.03 | | patched | 88.09% | 9.31 | +----------------+----------+------------------+ 3) Oracle 11g Data Mining (4k pages): Similar to the kernel build workload. +----------------+----------+------------------+ | caching scheme | hit-rate | cycles (billion) | +----------------+----------+------------------+ | baseline | 70.66% | 17.14 | | patched | 91.15% | 12.57 | +----------------+----------+------------------+ 4) Ebizzy: There's a fair amount of variation from run to run, but this approach always shows nearly perfect hit rates, while baseline is just about non-existent. The amounts of cycles can fluctuate between anywhere from ~60 to ~116 for the baseline scheme, but this approach reduces it considerably. For instance, with 80 threads: +----------------+----------+------------------+ | caching scheme | hit-rate | cycles (billion) | +----------------+----------+------------------+ | baseline | 1.06% | 91.54 | | patched | 99.97% | 14.18 | +----------------+----------+------------------+ [akpm@linux-foundation.org: fix nommu build, per Davidlohr] [akpm@linux-foundation.org: document vmacache_valid() logic] [akpm@linux-foundation.org: attempt to untangle header files] [akpm@linux-foundation.org: add vmacache_find() BUG_ON] [hughd@google.com: add vmacache_valid_mm() (from Oleg)] [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: adjust and enhance comments] Signed-off-by: Davidlohr Bueso <davidlohr@hp.com> Reviewed-by: Rik van Riel <riel@redhat.com> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Reviewed-by: Michel Lespinasse <walken@google.com> Cc: Oleg Nesterov <oleg@redhat.com> Tested-by: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07mm: implement ->map_pages for page cacheKirill A. Shutemov
filemap_map_pages() is generic implementation of ->map_pages() for filesystems who uses page cache. It should be safe to use filemap_map_pages() for ->map_pages() if filesystem use filemap_fault() for ->fault(). Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Matthew Wilcox <matthew.r.wilcox@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Dave Chinner <david@fromorbit.com> Cc: Ning Qu <quning@gmail.com> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07mm: introduce vm_ops->map_pages()Kirill A. Shutemov
Here's new version of faultaround patchset. It took a while to tune it and collect performance data. First patch adds new callback ->map_pages to vm_operations_struct. ->map_pages() is called when VM asks to map easy accessible pages. Filesystem should find and map pages associated with offsets from "pgoff" till "max_pgoff". ->map_pages() is called with page table locked and must not block. If it's not possible to reach a page without blocking, filesystem should skip it. Filesystem should use do_set_pte() to setup page table entry. Pointer to entry associated with offset "pgoff" is passed in "pte" field in vm_fault structure. Pointers to entries for other offsets should be calculated relative to "pte". Currently VM use ->map_pages only on read page fault path. We try to map FAULT_AROUND_PAGES a time. FAULT_AROUND_PAGES is 16 for now. Performance data for different FAULT_AROUND_ORDER is below. TODO: - implement ->map_pages() for shmem/tmpfs; - modify get_user_pages() to be able to use ->map_pages() and implement mmap(MAP_POPULATE|MAP_NONBLOCK) on top. ========================================================================= Tested on 4-socket machine (120 threads) with 128GiB of RAM. Few real-world workloads. The sweet spot for FAULT_AROUND_ORDER here is somewhere between 3 and 5. Let's say 4 :) Linux build (make -j60) FAULT_AROUND_ORDER Baseline 1 3 4 5 7 9 minor-faults 283,301,572 247,151,987 212,215,789 204,772,882 199,568,944 194,703,779 193,381,485 time, seconds 151.227629483 153.920996480 151.356125472 150.863792049 150.879207877 151.150764954 151.450962358 Linux rebuild (make -j60) FAULT_AROUND_ORDER Baseline 1 3 4 5 7 9 minor-faults 5,396,854 4,148,444 2,855,286 2,577,282 2,361,957 2,169,573 2,112,643 time, seconds 27.404543757 27.559725591 27.030057426 26.855045126 26.678618635 26.974523490 26.761320095 Git test suite (make -j60 test) FAULT_AROUND_ORDER Baseline 1 3 4 5 7 9 minor-faults 129,591,823 99,200,751 66,106,718 57,606,410 51,510,808 45,776,813 44,085,515 time, seconds 66.087215026 64.784546905 64.401156567 65.282708668 66.034016829 66.793780811 67.237810413 Two synthetic tests: access every word in file in sequential/random order. It doesn't improve much after FAULT_AROUND_ORDER == 4. Sequential access 16GiB file FAULT_AROUND_ORDER Baseline 1 3 4 5 7 9 1 thread minor-faults 4,195,437 2,098,275 525,068 262,251 131,170 32,856 8,282 time, seconds 7.250461742 6.461711074 5.493859139 5.488488147 5.707213983 5.898510832 5.109232856 8 threads minor-faults 33,557,540 16,892,728 4,515,848 2,366,999 1,423,382 442,732 142,339 time, seconds 16.649304881 9.312555263 6.612490639 6.394316732 6.669827501 6.75078944 6.371900528 32 threads minor-faults 134,228,222 67,526,810 17,725,386 9,716,537 4,763,731 1,668,921 537,200 time, seconds 49.164430543 29.712060103 12.938649729 10.175151004 11.840094583 9.594081325 9.928461797 60 threads minor-faults 251,687,988 126,146,952 32,919,406 18,208,804 10,458,947 2,733,907 928,217 time, seconds 86.260656897 49.626551828 22.335007632 17.608243696 16.523119035 16.339489186 16.326390902 120 threads minor-faults 503,352,863 252,939,677 67,039,168 35,191,827 19,170,091 4,688,357 1,471,862 time, seconds 124.589206333 79.757867787 39.508707872 32.167281632 29.972989292 28.729834575 28.042251622 Random access 1GiB file 1 thread minor-faults 262,636 132,743 34,369 17,299 8,527 3,451 1,222 time, seconds 15.351890914 16.613802482 16.569227308 15.179220992 16.557356122 16.578247824 15.365266994 8 threads minor-faults 2,098,948 1,061,871 273,690 154,501 87,110 25,663 7,384 time, seconds 15.040026343 15.096933500 14.474757288 14.289129964 14.411537468 14.296316837 14.395635804 32 threads minor-faults 8,390,734 4,231,023 1,054,432 528,847 269,242 97,746 26,881 time, seconds 20.430433109 21.585235358 22.115062928 14.872878951 14.880856305 14.883370649 14.821261690 60 threads minor-faults 15,733,258 7,892,809 1,973,393 988,266 594,789 164,994 51,691 time, seconds 26.577302548 25.692397770 18.728863715 20.153026398 21.619101933 17.745086260 17.613215273 120 threads minor-faults 31,471,111 15,816,616 3,959,209 1,978,685 1,008,299 264,635 96,010 time, seconds 41.835322703 40.459786095 36.085306105 35.313894834 35.814445675 36.552633793 34.289210594 Touch only one page in page table in 16GiB file FAULT_AROUND_ORDER Baseline 1 3 4 5 7 9 1 thread minor-faults 8,372 8,324 8,270 8,260 8,249 8,239 8,237 time, seconds 0.039892712 0.045369149 0.051846126 0.063681685 0.079095975 0.17652406 0.541213386 8 threads minor-faults 65,731 65,681 65,628 65,620 65,608 65,599 65,596 time, seconds 0.124159196 0.488600638 0.156854426 0.191901957 0.242631486 0.543569456 1.677303984 32 threads minor-faults 262,388 262,341 262,285 262,276 262,266 262,257 263,183 time, seconds 0.452421421 0.488600638 0.565020946 0.648229739 0.789850823 1.651584361 5.000361559 60 threads minor-faults 491,822 491,792 491,723 491,711 491,701 491,691 491,825 time, seconds 0.763288616 0.869620515 0.980727360 1.161732354 1.466915814 3.04041448 9.308612938 120 threads minor-faults 983,466 983,655 983,366 983,372 983,363 984,083 984,164 time, seconds 1.595846553 1.667902182 2.008959376 2.425380942 2.941368804 5.977807890 18.401846125 This patch (of 2): Introduce new vm_ops callback ->map_pages() and uses it for mapping easy accessible pages around fault address. On read page fault, if filesystem provides ->map_pages(), we try to map up to FAULT_AROUND_PAGES pages around page fault address in hope to reduce number of minor page faults. We call ->map_pages first and use ->fault() as fallback if page by the offset is not ready to be mapped (cold page cache or something). Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Matthew Wilcox <matthew.r.wilcox@intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Dave Chinner <david@fromorbit.com> Cc: Ning Qu <quning@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07mm, thp: add VM_INIT_DEF_MASK and PRCTL_THP_DISABLEAlex Thorlton
Add VM_INIT_DEF_MASK, to allow us to set the default flags for VMs. It also adds a prctl control which allows us to set the THP disable bit in mm->def_flags so that VMs will pick up the setting as they are created. Signed-off-by: Alex Thorlton <athorlton@sgi.com> Suggested-by: Oleg Nesterov <oleg@redhat.com> Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Mel Gorman <mgorman@suse.de> Acked-by: Rik van Riel <riel@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: David Rientjes <rientjes@google.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07Merge tag 'cpu-hotplug-3.15-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull CPU hotplug notifiers registration fixes from Rafael Wysocki: "The purpose of this single series of commits from Srivatsa S Bhat (with a small piece from Gautham R Shenoy) touching multiple subsystems that use CPU hotplug notifiers is to provide a way to register them that will not lead to deadlocks with CPU online/offline operations as described in the changelog of commit 93ae4f978ca7f ("CPU hotplug: Provide lockless versions of callback registration functions"). The first three commits in the series introduce the API and document it and the rest simply goes through the users of CPU hotplug notifiers and converts them to using the new method" * tag 'cpu-hotplug-3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (52 commits) net/iucv/iucv.c: Fix CPU hotplug callback registration net/core/flow.c: Fix CPU hotplug callback registration mm, zswap: Fix CPU hotplug callback registration mm, vmstat: Fix CPU hotplug callback registration profile: Fix CPU hotplug callback registration trace, ring-buffer: Fix CPU hotplug callback registration xen, balloon: Fix CPU hotplug callback registration hwmon, via-cputemp: Fix CPU hotplug callback registration hwmon, coretemp: Fix CPU hotplug callback registration thermal, x86-pkg-temp: Fix CPU hotplug callback registration octeon, watchdog: Fix CPU hotplug callback registration oprofile, nmi-timer: Fix CPU hotplug callback registration intel-idle: Fix CPU hotplug callback registration clocksource, dummy-timer: Fix CPU hotplug callback registration drivers/base/topology.c: Fix CPU hotplug callback registration acpi-cpufreq: Fix CPU hotplug callback registration zsmalloc: Fix CPU hotplug callback registration scsi, fcoe: Fix CPU hotplug callback registration scsi, bnx2fc: Fix CPU hotplug callback registration scsi, bnx2i: Fix CPU hotplug callback registration ...
2014-04-07sched: remove sleep_on() and friendsArnd Bergmann
This is the final piece in the puzzle, as all patches to remove the last users of \(interruptible_\|\)sleep_on\(_timeout\|\) have made it into the 3.15 merge window. The work was long overdue, and this interface in particular should not have survived the BKL removal that was done a couple of years ago. Citing Jon Corbet from http://lwn.net/2001/0201/kernel.php3": "[...] it was suggested that the janitors look for and fix all code that calls sleep_on() [...] since (1) almost all such code is incorrect, and (2) Linus has agreed that those functions should be removed in the 2.5 development series". We haven't quite made it for 2.5, but maybe we can merge this for 3.15. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-07Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client Pull Ceph updates from Sage Weil: "The biggest chunk is a series of patches from Ilya that add support for new Ceph osd and crush map features, including some new tunables, primary affinity, and the new encoding that is needed for erasure coding support. This brings things into parity with the server side and the looming firefly release. There is also support for allocation hints in RBD that help limit fragmentation on the server side. There is also a series of patches from Zheng fixing NFS reexport, directory fragmentation support, flock vs fnctl behavior, and some issues with clustered MDS. Finally, there are some miscellaneous fixes from Yunchuan Wen for fscache, Fabian Frederick for ACLs, and from me for fsync(dirfd) behavior" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (79 commits) ceph: skip invalid dentry during dcache readdir libceph: dump pool {read,write}_tier to debugfs libceph: output primary affinity values on osdmap updates ceph: flush cap release queue when trimming session caps ceph: don't grabs open file reference for aborted request ceph: drop extra open file reference in ceph_atomic_open() ceph: preallocate buffer for readdir reply libceph: enable PRIMARY_AFFINITY feature bit libceph: redo ceph_calc_pg_primary() in terms of ceph_calc_pg_acting() libceph: add support for osd primary affinity libceph: add support for primary_temp mappings libceph: return primary from ceph_calc_pg_acting() libceph: switch ceph_calc_pg_acting() to new helpers libceph: introduce apply_temps() helper libceph: introduce pg_to_raw_osds() and raw_to_up_osds() helpers libceph: ceph_can_shift_osds(pool) and pool type defines libceph: ceph_osd_{exists,is_up,is_down}(osd) definitions libceph: enable OSDMAP_ENC feature bit libceph: primary_affinity decode bits libceph: primary_affinity infrastructure ...
2014-04-07NTB: Code Style Clean-upJon Mason
Some white space and 80 char overruns corrected. Signed-off-by: Jon Mason <jon.mason@intel.com>
2014-04-07NTB: client event cleanupJon Mason
Provide a better event interface between the client and transport Signed-off-by: Jon Mason <jon.mason@intel.com>
2014-04-07Merge tag 'for-f2fs-3.15' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs Pull f2fs updates from Jaegeuk Kim: "This patch-set includes the following major enhancement patches. - introduce large directory support - introduce f2fs_issue_flush to merge redundant flush commands - merge write IOs as much as possible aligned to the segment - add sysfs entries to tune the f2fs configuration - use radix_tree for the free_nid_list to reduce in-memory operations - remove costly bit operations in f2fs_find_entry - enhance the readahead flow for CP/NAT/SIT/SSA blocks The other bug fixes are as follows: - recover xattr node blocks correctly after sudden-power-cut - fix to calculate the maximum number of node ids - enhance to handle many error cases And, there are a bunch of cleanups" * tag 'for-f2fs-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (62 commits) f2fs: fix wrong statistics of inline data f2fs: check the acl's validity before setting f2fs: introduce f2fs_issue_flush to avoid redundant flush issue f2fs: fix to cover io->bio with io_rwsem f2fs: fix error path when fail to read inline data f2fs: use list_for_each_entry{_safe} for simplyfying code f2fs: avoid free slab cache under spinlock f2fs: avoid unneeded lookup when xattr name length is too long f2fs: avoid unnecessary bio submit when wait page writeback f2fs: return -EIO when node id is not matched f2fs: avoid RECLAIM_FS-ON-W warning f2fs: skip unnecessary node writes during fsync f2fs: introduce fi->i_sem to protect fi's info f2fs: change reclaim rate in percentage f2fs: add missing documentation for dir_level f2fs: remove unnecessary threshold f2fs: throttle the memory footprint with a sysfs entry f2fs: avoid to drop nat entries due to the negative nr_shrink f2fs: call f2fs_wait_on_page_writeback instead of native function f2fs: introduce nr_pages_to_write for segment alignment ...
2014-04-07Merge tag 'fbdev-omap-3.15' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux Pull OMAP fbdev changes from Tomi Valkeinen: "This is based on the already pulled fbdev-main changes, and this also merges .dts branch from Tony Lindgren (which has also been pulled), so that I was able to add the display related .dts changes. This contains OMAP related fbdev changes for 3.15. The bulk of the patches are for adding Device Tree support for OMAP Display Subsystem: - SoCs: OMAP2/3/4 - Boards: OMAP4 Panda, OMAP4 SDP, OMAP3 Beagle, OMAP3 Beagle-xM, OMAP3 IGEP0020, OMAP3 N900 - Devices: TFP410 Encoder, tpd12s015 HDMI companion chip, Sony acx565akm panel, MIPI DSI Command mode panel and HDMI, DVI and Analog TV connectors" * tag 'fbdev-omap-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux: (45 commits) OMAPDSS: HDMI: fix interlace output OMAPDSS: add missing __init for dss_init_ports ARM: OMAP2+: remove pdata quirks for displays OMAPDSS: remove DT hacks for regulators Doc/DT: Add DT binding documentation for tpd12s015 encoder Doc/DT: Add DT binding documentation for TFP410 encoder Doc/DT: Add DT binding documentation for Sony acx565akm panel Doc/DT: Add DT binding documentation for MIPI DSI CM Panel Doc/DT: Add DT binding documentation for HDMI Connector Doc/DT: Add DT binding documentation for DVI Connector Doc/DT: Add DT binding documentation for Analog TV Connector ARM: omap3-n900.dts: add display information ARM: omap3-igep0020.dts: add display information ARM: omap3-beagle-xm.dts: add display information ARM: omap3-beagle.dts: add display information ARM: omap4-sdp.dts: add display information Doc/DT: Add DT binding documentation for OMAP DSS OMAPDSS: acx565akm: Add DT support OMAPDSS: connector-analog-tv: Add DT support OMAPDSS: hdmi-connector: Add DT support ...
2014-04-07Merge tag 'mfd-for-linus-3.15' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd Pull MFD updates from Lee Jones: "Changes to existing drivers: - Use of managed resources - omap, twl4030, ti_am335x_tscadc - Advanced error handling - omap - Rework clk management - omap - Device Tree (re-)work - tc3589x, pm8921, da9055, sec - IRC management overhaul and !BROKEN - pm8921 - Convert to regmap - ssbi, pm8921 - Use simple power-management ops - ucb1x00 - Include file clean-up - adp5520, cs5535, janz, lpc_ich, - lpc_sch, max14577, mcp-sa11x0, pcf50633-adc, rc5t583, rdc321x-southbridge, retu, smsc-ece1099, ti-ssp, ti_am335x_tscadc, tps65912, vexpress-config, wm8350, ywm8350 - Various bug fixes across the subsystem - NULL/invalid pointer dereference prevention - Resource leak mitigation, - Variable used initialised - Staticise various containers - Enforce return value checks New drivers/supported devices: - Add support for s2mps14 and s2mpa01 to sec - Add support for da9063 (v5) to da9063 - Add support for atom-c2000 to gpio-ich - Add support for come-{mbt10,cbt6,chl6} to kempld - Add support for da9053 to da9052 - Add support for itco-wdt (v3) and baytrail to lpc_ich - Add new drivers for tps65218, rtsx_usb, bcm590xx (Re-)moved drivers: - twl4030 ==> drivers/iio - ti-ssp ==> /dev/null" * tag 'mfd-for-linus-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (103 commits) mfd: wm5110: Correct default for HEADPHONE_DETECT_1 mfd: arizona: Correct small errors in the DT binding documentation mfd: arizona: Mark DSP clocking register as volatile mfd: devicetree: bindings: Add pm8xxx RTC description mfd: kempld-core: Fix potential hang-up during boot mfd: sec-core: Fix uninitialized 'regmap_rtc' on S2MPA01 mfd: tps65910: Fix regmap_irq_chip_data leak on mfd_add_devices fail mfd: tps65910: Fix possible invalid pointer dereference on regmap_add_irq_chip fail mfd: sec-core: Fix I2C dummy device resource leak on probe failure mfd: sec-core: Add of_compatible strings for clock MFD cells mfd: Remove obsolete ti-ssp driver Documentation: mfd: s2mps11: Describe S5M8767 and S2MPS14 clocks mfd: bcm590xx: Fix type argument for module device table mfd: lpc_ich: Add support for Intel Bay Trail SoC mfd: lpc_ich: Add support for NM10 GPIO mfd: lpc_ich: Change Avoton to iTCO v3 watchdog: iTCO_wdt: Add support for v3 silicon mfd: lpc_ich: Add support for iTCO v3 mfd: lpc_ich: Remove lpc_ich_cfg struct use mfd: lpc_ich: Only configure watchdog or GPIO when present ...
2014-04-07Merge tag 'for-linus-20140405' of git://git.infradead.org/linux-mtdLinus Torvalds
Pull MTD updates from Brian Norris: - A few SPI NOR ID definitions - Kill the NAND "max pagesize" restriction - Fix some x16 bus-width NAND support - Add NAND JEDEC parameter page support - DT bindings for NAND ECC - GPMI NAND updates (subpage reads) - More OMAP NAND refactoring - New STMicro SPI NOR driver (now in 40 patches!) - A few other random bugfixes * tag 'for-linus-20140405' of git://git.infradead.org/linux-mtd: (120 commits) Fix index regression in nand_read_subpage mtd: diskonchip: mem resource name is not optional mtd: nand: fix mention to CONFIG_MTD_NAND_ECC_BCH mtd: nand: fix GET/SET_FEATURES address on 16-bit devices mtd: omap2: Use devm_ioremap_resource() mtd: denali_dt: Use devm_ioremap_resource() mtd: devices: elm: update DRIVER_NAME as "omap-elm" mtd: devices: elm: configure parallel channels based on ecc_steps mtd: devices: elm: clean elm_load_syndrome mtd: devices: elm: check for hardware engine's design constraints mtd: st_spi_fsm: Succinctly reorganise .remove() mtd: st_spi_fsm: Allow loop to run at least once before giving up CPU mtd: st_spi_fsm: Correct vendor name spelling issue - missing "M" mtd: st_spi_fsm: Avoid duplicating MTD core code mtd: st_spi_fsm: Remove useless consts from function arguments mtd: st_spi_fsm: Convert ST SPI FSM (NOR) Flash driver to new DT partitions mtd: st_spi_fsm: Move runtime configurable msg sequences into device's struct mtd: st_spi_fsm: Supply the W25Qxxx chip specific configuration call-back mtd: st_spi_fsm: Supply the S25FLxxx chip specific configuration call-back mtd: st_spi_fsm: Supply the MX25xxx chip specific configuration call-back ...
2014-04-07cpufreq: create another field .flags in cpufreq_frequency_tableViresh Kumar
Currently cpufreq frequency table has two fields: frequency and driver_data. driver_data is only for drivers' internal use and cpufreq core shouldn't use it at all. But with the introduction of BOOST frequencies, this assumption was broken and we started using it as a flag instead. There are two problems due to this: - It is against the description of this field, as driver's data is used by the core now. - if drivers fill it with -3 for any frequency, then those frequencies are never considered by cpufreq core as it is exactly same as value of CPUFREQ_BOOST_FREQ, i.e. ~2. The best way to get this fixed is by creating another field flags which will be used for such flags. This patch does that. Along with that various drivers need modifications due to the change of struct cpufreq_frequency_table. Reviewed-by: Gautham R Shenoy <ego@linux.vnet.ibm.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-04-07target/sbc: Add sbc_dif_read_strip software emulationNicholas Bellinger
Split up __sbc_dif_verify_read() so that VERIFY READ emulation can perform target-core specific READ_STRIP, seperate from the existing FILEIO/RAMDISK backend emulation code. Also add sbc_dif_read_strip() in order to determine number of sectors using cmd->prot_length, and skip the extra sbc_dif_copy_prot(). Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Or Gerlitz <ogerlitz@mellanox.com> Cc: Quinn Tran <quinn.tran@qlogic.com> Cc: Giridhar Malavali <giridhar.malavali@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-04-07target/sbc: Add sbc_dif_generate software emulationNicholas Bellinger
This patch adds WRITE_INSERT emulation within target-core using TYPE1 / TYPE3 PI modes in sbc_dif_generate() code. This is useful in order for existing legacy fabrics that do not support protection offloads to interact with backend devices that currently have T10 PI enabled. v2 changes: - Rename to sbc_dif_generate() (Sagi) Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Or Gerlitz <ogerlitz@mellanox.com> Cc: Quinn Tran <quinn.tran@qlogic.com> Cc: Giridhar Malavali <giridhar.malavali@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-04-07target: Pass in transport supported PI at session initializationNicholas Bellinger
In order to support local WRITE_INSERT + READ_STRIP operations for non PI enabled fabrics, the fabric driver needs to be able signal what protection offload operations are supported. This is done at session initialization time so the modes can be signaled by individual se_wwn + se_portal_group endpoints, as well as optionally across different transports on the same endpoint. For iser-target, set TARGET_PROT_ALL if the underlying ib_device has already signaled PI offload support, and allow this to be exposed via a new iscsit_transport->iscsit_get_sup_prot_ops() callback. For loopback, set TARGET_PROT_ALL to signal SCSI initiator mode operation. For all other drivers, set TARGET_PROT_NORMAL to disable fabric level PI. Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Or Gerlitz <ogerlitz@mellanox.com> Cc: Quinn Tran <quinn.tran@qlogic.com> Cc: Giridhar Malavali <giridhar.malavali@qlogic.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-04-07target: Add TFO->abort_task for aborted task resources releaseNicholas Bellinger
Now that TASK_ABORTED status is not generated for all cases by TMR ABORT_TASK + LUN_RESET, a new TFO->abort_task() caller is necessary in order to give fabric drivers a chance to unmap hardware / software resources before the se_cmd descriptor is released via the normal TFO->release_cmd() codepath. This patch adds TFO->aborted_task() in core_tmr_abort_task() in place of the original transport_send_task_abort(), and also updates all fabric drivers to implement this caller. The fabric drivers that include changes to perform cleanup via ->aborted_task() are: - iscsi-target - iser-target - srpt - tcm_qla2xxx The fabric drivers that currently set ->aborted_task() to NOPs are: - loopback - tcm_fc - usb-gadget - sbp-target - vhost-scsi For the latter five, there appears to be no additional cleanup required before invoking TFO->release_cmd() to release the se_cmd descriptor. v2 changes: - Move ->aborted_task() call into transport_cmd_finish_abort (Alex) Cc: Alex Leung <amleung21@yahoo.com> Cc: Mark Rustad <mark.d.rustad@intel.com> Cc: Roland Dreier <roland@kernel.org> Cc: Vu Pham <vu@mellanox.com> Cc: Chris Boot <bootc@bootc.net> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Giridhar Malavali <giridhar.malavali@qlogic.com> Cc: Saurav Kashyap <saurav.kashyap@qlogic.com> Cc: Quinn Tran <quinn.tran@qlogic.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-04-07target: Fix Task Aborted Status (TAS) handlingAlex Leung
This patch addresses three of long standing issues wrt to Task Aborted Status (TAS) handling. The first is the incorrect assumption in core_tmr_handle_tas_abort() that TASK_ABORTED status is sent for the task referenced by TMR ABORT_TASK, and sending TASK_ABORTED status for TMR LUN_RESET on the same nexus the LUN_RESET was received. The second is to ensure the lun reference count is dropped within transport_cmd_finish_abort() by calling transport_lun_remove_cmd() before invoking transport_cmd_check_stop_to_fabric(). The last is to fix the delayed TAS handling to allow outstanding WRITEs to complete before sending the TASK_ABORTED status. This includes changing transport_check_aborted_status() to avoid processing when SCF_SEND_DELAYED_TAS has not be set, and updating transport_send_task_abort() to drop the SCF_SENT_DELAYED_TAS check. Signed-off-by: Alex Leung <amleung21@yahoo.com> Cc: Alex Leung <amleung21@yahoo.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-04-07Target/core: Remove prot_handover use for nowSagi Grimberg
This is not going to be supported soon - so drop it. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-04-07Target/dif: Introduce protection-passthough-only modeSagi Grimberg
Some transports (iSCSI/iSER/SRP/FC) support hardware INSERT/STRIP capabilities while other transports like loopback/vhost-scsi need perform this is software. This patch allows fabrics using SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC to signal the early LUN scan handling case where PROTECT CDB bits are set, but no fabric buffer has been provided. For transports which use generic new command these buffers have yet to be allocated. Also this way, target may support protection information against legacy initiators (writes are inserted and reads are stripped). (Only set prot_pto for loopback during early special case - nab) Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2014-04-06Merge tag 'nfs-for-3.15-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds
Pull NFS client updates from Trond Myklebust: "Highlights include: - Stable fix for a use after free issue in the NFSv4.1 open code - Fix the SUNRPC bi-directional RPC code to account for TCP segmentation - Optimise usage of readdirplus when confronted with 'ls -l' situations - Soft mount bugfixes - NFS over RDMA bugfixes - NFSv4 close locking fixes - Various NFSv4.x client state management optimisations - Rename/unlink code cleanups" * tag 'nfs-for-3.15-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (28 commits) nfs: pass string length to pr_notice message about readdir loops NFSv4: Fix a use-after-free problem in open() SUNRPC: rpc_restart_call/rpc_restart_call_prepare should clear task->tk_status SUNRPC: Don't let rpc_delay() clobber non-timeout errors SUNRPC: Ensure call_connect_status() deals correctly with SOFTCONN tasks SUNRPC: Ensure call_status() deals correctly with SOFTCONN tasks NFSv4: Ensure we respect soft mount timeouts during trunking discovery NFSv4: Schedule recovery if nfs40_walk_client_list() is interrupted NFS: advertise only supported callback netids SUNRPC: remove KERN_INFO from dprintk() call sites SUNRPC: Fix large reads on NFS/RDMA NFS: Clean up: revert increase in READDIR RPC buffer max size SUNRPC: Ensure that call_bind times out correctly SUNRPC: Ensure that call_connect times out correctly nfs: emit a fsnotify_nameremove call in sillyrename codepath nfs: remove synchronous rename code nfs: convert nfs_rename to use async_rename infrastructure nfs: make nfs_async_rename non-static nfs: abstract out code needed to complete a sillyrename NFSv4: Clear the open state flags if the new stateid does not match ...
2014-04-06Merge tag 'modules-next-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull module updates from Rusty Russell: "Nothing major: the stricter permissions checking for sysfs broke a staging driver; fix included. Greg KH said he'd take the patch but hadn't as the merge window opened, so it's included here to avoid breaking build" * tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: staging: fix up speakup kobject mode Use 'E' instead of 'X' for unsigned module taint flag. VERIFY_OCTAL_PERMISSIONS: stricter checking for sysfs perms. kallsyms: fix percpu vars on x86-64 with relocation. kallsyms: generalize address range checking module: LLVMLinux: Remove unused function warning from __param_check macro Fix: module signature vs tracepoints: add new TAINT_UNSIGNED_MODULE module: remove MODULE_GENERIC_TABLE module: allow multiple calls to MODULE_DEVICE_TABLE() per module module: use pr_cont
2014-04-06[media] rc-core: remove generic scancode filterDavid Härdeman
The generic scancode filtering has questionable value and makes it impossible to determine from userspace if there is an actual scancode hw filter present or not. So revert the generic parts. Based on a patch from James Hogan <james.hogan@imgtec.com>, but this version also makes sure that only the valid sysfs files are created in the first place. Signed-off-by: David Härdeman <david@hardeman.nu> Acked-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
2014-04-06[media] rc-core: split dev->s_filterDavid Härdeman
Overloading dev->s_filter to do two different functions (set wakeup filters and generic hardware filters) makes it impossible to tell what the hardware actually supports, so create a separate dev->s_wakeup_filter and make the distinction explicit. Signed-off-by: David Härdeman <david@hardeman.nu> Acked-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
2014-04-06[media] v4l2-common: fix warning when used on userpaceMauro Carvalho Chehab
As reported by Linus, make headers_check is reporting: usr/include/linux/v4l2-common.h:72: found __[us]{8,16,32,64} type without #include <linux/types.h> which seems to have come in through commits 777f4f85b75f1 and 254a47770163f. That happens because struct v4l2_edid should be visible by both subdev and V4L2 APIs. So, it was moved to v4l2-common.h. As Linus pointed, the proper fix is to just add an include for linux/types.h at v4l2-common.h. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
2014-04-05Merge tag 'dm-3.15-changes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm Pull device mapper changes from Mike Snitzer: - Fix dm-cache corruption caused by discard_block_size > cache_block_size - Fix a lock-inversion detected by LOCKDEP in dm-cache - Fix a dangling bio bug in the dm-thinp target's process_deferred_bios error path - Fix corruption due to non-atomic transaction commit which allowed a metadata superblock to be written before all other metadata was successfully written -- this is common to all targets that use the persistent-data library's transaction manager (dm-thinp, dm-cache and dm-era). - Various small cleanups in the DM core - Add the dm-era target which is useful for keeping track of which blocks were written within a user defined period of time called an 'era'. Use cases include tracking changed blocks for backup software, and partially invalidating the contents of a cache to restore cache coherency after rolling back a vendor snapshot. - Improve the on-disk layout of multithreaded writes to the dm-thin-pool by splitting the pool's deferred bio list to be a per-thin device list and then sorting that list using an rb_tree. The subsequent read throughput of the data written via multiple threads improved by ~70%. - Simplify the multipath target's handling of queuing IO by pushing requests back to the request queue rather than queueing the IO internally. * tag 'dm-3.15-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (24 commits) dm cache: fix a lock-inversion dm thin: sort the per thin deferred bios using an rb_tree dm thin: use per thin device deferred bio lists dm thin: simplify pool_is_congested dm thin: fix dangling bio in process_deferred_bios error path dm mpath: print more useful warnings in multipath_message() dm-mpath: do not activate failed paths dm mpath: remove extra nesting in map function dm mpath: remove map_io() dm mpath: reduce memory pressure when requeuing dm mpath: remove process_queued_ios() dm mpath: push back requests instead of queueing dm table: add dm_table_run_md_queue_async dm mpath: do not call pg_init when it is already running dm: use RCU_INIT_POINTER instead of rcu_assign_pointer in __unbind dm: stop using bi_private dm: remove dm_get_mapinfo dm: make dm_table_alloc_md_mempools static dm: take care to copy the space map roots before locking the superblock dm transaction manager: fix corruption due to non-atomic transaction commit ...
2014-04-05Merge tag 'iommu-updates-v3.15' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu Pull IOMMU upates from Joerg Roedel: "This time a few more updates queued up. - Rework VT-d code to support ACPI devices - Improvements for memory and PCI hotplug support in the VT-d driver - Device-tree support for OMAP IOMMU - Convert OMAP IOMMU to use devm_* interfaces - Fixed PASID support for AMD IOMMU - Other random cleanups and fixes for OMAP, ARM-SMMU and SHMOBILE IOMMU Most of the changes are in the VT-d driver because some rework was necessary for better hotplug and ACPI device support" * tag 'iommu-updates-v3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (75 commits) iommu/vt-d: Fix error handling in ANDD processing iommu/vt-d: returning free pointer in get_domain_for_dev() iommu/vt-d: Only call dmar_acpi_dev_scope_init() if DRHD units present iommu/vt-d: Check for NULL pointer in dmar_acpi_dev_scope_init() iommu/amd: Fix logic to determine and checking max PASID iommu/vt-d: Include ACPI devices in iommu=pt iommu/vt-d: Finally enable translation for non-PCI devices iommu/vt-d: Remove to_pci_dev() in intel_map_page() iommu/vt-d: Remove pdev from intel_iommu_attach_device() iommu/vt-d: Remove pdev from iommu_no_mapping() iommu/vt-d: Make domain_add_dev_info() take struct device iommu/vt-d: Make domain_remove_one_dev_info() take struct device iommu/vt-d: Rename 'hwdev' variables to 'dev' now that that's the norm iommu/vt-d: Remove some pointless to_pci_dev() calls iommu/vt-d: Make get_valid_domain_for_dev() take struct device iommu/vt-d: Make iommu_should_identity_map() take struct device iommu/vt-d: Handle RMRRs for non-PCI devices iommu/vt-d: Make get_domain_for_dev() take struct device iommu/vt-d: Make domain_context_mapp{ed,ing}() take struct device iommu/vt-d: Make device_to_iommu() cope with non-PCI devices ...
2014-04-05Merge tag 'clk-for-linus-3.15' of ↵Linus Torvalds
git://git.linaro.org/people/mike.turquette/linux Pull clock framework changes from Mike Turquette: "The clock framework changes for 3.15 look similar to past pull requests. Mostly clock driver updates, more Device Tree support in the form of common functions useful across platforms and a handful of features and fixes to the framework core" * tag 'clk-for-linus-3.15' of git://git.linaro.org/people/mike.turquette/linux: (86 commits) clk: shmobile: fix setting paretn clock rate clk: shmobile: rcar-gen2: fix lb/sd0/sd1/sdh clock parent to pll1 clk: Fix minor errors in of_clk_init() function comments clk: reverse default clk provider initialization order in of_clk_init() clk: sirf: update copyright years to 2014 clk: mmp: try to use closer one when do round rate clk: mmp: fix the wrong calculation formula clk: mmp: fix wrong mask when calculate denominator clk: st: Adds quadfs clock binding clk: st: Adds clockgen-vcc and clockgen-mux clock binding clk: st: Adds clockgen clock binding clk: st: Adds divmux and prediv clock binding clk: st: Support for A9 MUX clocks clk: st: Support for ClockGenA9/DDR/GPU clk: st: Support for QUADFS inside ClockGenB/C/D/E/F clk: st: Support for VCC-mux and MUX clocks clk: st: Support for PLLs inside ClockGenA(s) clk: st: Support for DIVMUX and PreDiv Clocks clk: support hardware-specific debugfs entries clk: s2mps11: Use of_get_child_by_name ...
2014-04-05Merge tag 'pwm/for-3.15-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm Pull pwm changes from Thierry Reding: "The legacy HAVE_PWM Kconfig symbol is finally being retired. Thanks a lot to Sascha Hauer for doing that. Three new drivers are added: Freescale FTM, Cirrus Logic CLPS711X and Intel Low Power Subsystem. An assortment of fixes and cleanups rounds things off for this release cycle" * tag 'pwm/for-3.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: pwm: pxa: Constify OF match table pwm: pxa: Fix typo "pwm" -> "PWM" Revert "pwm: pxa: Use of_match_ptr()" pwm: add support for Intel Low Power Subsystem PWM pwm: Add CLPS711X PWM support pwm: atmel: correct CDTY calculation pwm: atmel: Fix polarity handling Documentation: Add device tree bindings for Freescale FTM PWM. pwm: Add Freescale FTM PWM driver support pwm: pxa: Use of_match_ptr() pwm: samsung: Use SIMPLE_DEV_PM_OPS macro pwm: renesas-tpu: Add dependency on HAS_IOMEM pwm: Remove obsolete HAVE_PWM Kconfig symbol
2014-04-05Merge tag 'tags/cleanup2-3.15' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC late cleanups from Arnd Bergmann: "These could not be part of the first cleanup branch, because they either came too late in the cycle, or they have dependencies on other branches. Important changes are: - The integrator platform is almost multiplatform capable after some reorganization (Linus Walleij) - Minor cleanups on Zynq (Michal Simek) - Lots of changes for Exynos and other Samsung platforms, including further preparations for multiplatform support and the clocks bindings are rearranged" * tag 'tags/cleanup2-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (54 commits) devicetree: fix newly added exynos sata bindings ARM: EXYNOS: Fix compilation error in cpuidle.c ARM: S5P64X0: Explicitly include linux/serial_s3c.h in mach/pm-core.h ARM: EXYNOS: Remove hardware.h file ARM: SAMSUNG: Remove hardware.h inclusion ARM: S3C24XX: Remove invalid code from hardware.h dt-bindings: clock: Move exynos-audss-clk.h to dt-bindings/clock ARM: dts: Keep some essential LDOs enabled for arndale-octa board ARM: dts: Disable MDMA1 node for arndale-octa board ARM: S3C64XX: Fix build for implicit serial_s3c.h inclusion serial: s3c: Fix build of header without serial_core.h preinclusion ARM: EXYNOS: Allow wake-up using GIC interrupts ARM: EXYNOS: Stop using legacy Samsung PM code ARM: EXYNOS: Remove PM initcalls and useless indirection ARM: EXYNOS: Fix abuse of CONFIG_PM ARM: SAMSUNG: Move s3c_pm_check_* prototypes to plat/pm-common.h ARM: SAMSUNG: Move common save/restore helpers to separate file ARM: SAMSUNG: Move Samsung PM debug code into separate file ARM: SAMSUNG: Consolidate PM debug functions ARM: SAMSUNG: Use debug_ll_addr() to get UART base address ...
2014-04-05Merge tag 'drivers-3.15' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC driver changes from Arnd Bergmann: "These changes are mostly for ARM specific device drivers that either don't have an upstream maintainer, or that had the maintainer ask us to pick up the changes to avoid conflicts. A large chunk of this are clock drivers (bcm281xx, exynos, versatile, shmobile), aside from that, reset controllers for STi as well as a large rework of the Marvell Orion/EBU watchdog driver are notable" * tag 'drivers-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (99 commits) Revert "dts: socfpga: Add DTS entry for adding the stmmac glue layer for stmmac." Revert "net: stmmac: Add SOCFPGA glue driver" ARM: shmobile: r8a7791: Fix SCIFA3-5 clocks ARM: STi: Add reset controller support to mach-sti Kconfig drivers: reset: stih416: add softreset controller drivers: reset: stih415: add softreset controller drivers: reset: Reset controller driver for STiH416 drivers: reset: Reset controller driver for STiH415 drivers: reset: STi SoC system configuration reset controller support dts: socfpga: Add sysmgr node so the gmac can use to reference dts: socfpga: Add support for SD/MMC on the SOCFPGA platform reset: Add optional resets and stubs ARM: shmobile: r7s72100: fix bus clock calculation Power: Reset: Generalize qnap-poweroff to work on Synology devices. dts: socfpga: Update clock entry to support multiple parents ARM: socfpga: Update socfpga_defconfig dts: socfpga: Add DTS entry for adding the stmmac glue layer for stmmac. net: stmmac: Add SOCFPGA glue driver watchdog: orion_wdt: Use %pa to print 'phys_addr_t' drivers: cci: Export CCI PMU revision ...
2014-04-05Merge tag 'dt-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds
Pull ARM SoC device tree changes from Arnd Bergmann: "A large part of the arm-soc patches are nowadays DT changes, adding support for new SoCs, boards and devices without changing kernel source. The plan is still to move the devicetree files out of the kernel tree and reduce the amount of churn going on here, but we keep finding reasons to delay doing that. Changes are really all over the place, with little sticking out particularly. We have contributions from a total of 116 people in this branch. Unfortunately, the size of this branch also causes a significant number of conflicts at the moment, typically when subsystem maintainers merge patches that change the driver at the same time as the dts files. In most cases this could be avoided because the dts changes are supposed to be compatible in both ways, and we are asking everyone to send ARM dts changes through our tree only" * tag 'dt-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (541 commits) dts: stmmac: Document the clocks property in the stmmac base document dts: socfpga: Add DTS entry for adding the stmmac glue layer for stmmac. ARM: STi: stih41x: Add support for the FSM Serial Flash Controller ARM: STi: stih416: Add support for the FSM Serial Flash Controller ARM: tegra: fix Dalmore pinctrl configuration ARM: dts: keystone: use common "ti,keystone" compatible instead of -evm ARM: dts: k2hk-evm: set ubifs partition size for 512M NAND ARM: dts: Build all keystone dt blobs ARM: dts: keystone: Fix control register range for clktsip ARM: dts: keystone: Fix domain register range for clkfftc1 ARM: dts: bcm28155-ap: leave camldo1 on to fix reboot ARM: dts: add bcm590xx pmu support and enable for bcm28155-ap ARM: dts: bcm21664: Add device tree files. ARM: DT: bcm21664: Device tree bindings ARM: efm32: properly namespace i2c location property ARM: efm32: fix unit address part in USART2 device nodes' names ARM: mvebu: Enable NAND controller in Armada 385-DB ARM: mvebu: Add support for NAND controller in Armada 38x SoC ARM: mvebu: Add the Core Divider clock to Armada 38x SoCs ARM: mvebu: Add a 2 GHz fixed-clock on Armada 38x SoCs ...
2014-04-05Merge tag 'soc-3.15' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC specific changes from Arnd Bergmann: "Lots of changes specific to one of the SoC families. Some that stick out are: - mach-qcom gains new features, most importantly SMP support for the newer chips (Stephen Boyd, Rohit Vaswani) - mvebu gains support for three new SoCs: Armada 375, 380 and 385 (Thomas Petazzoni and Free-electrons team) - SMP support for Rockchips (Heiko Stübner) - Lots of i.MX changes (Shawn Guo) - Added support for BCM5301x SoC (Hauke Mehrtens) - Multiplatform support for Marvell Kirkwood and Dove (Andrew Lunn and Sebastian Hesselbarth doing the final part of a long journey) - Unify davinci platforms and remove obsolete ones (Sekhar Nori, Arnd Bergmann)" * tag 'soc-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (126 commits) ARM: sunxi: Select HAVE_ARM_ARCH_TIMER ARM: cache-tauros2: remove ARMv6 code ARM: mvebu: don't select CONFIG_NEON ARM: davinci: fix DT booting with default defconfig ARM: configs: bcm_defconfig: enable bcm590xx regulator support ARM: davinci: remove tnetv107x support MAINTAINERS: Update ARM STi maintainers ARM: restrict BCM_KONA_UART to ARCH_BCM_MOBILE ARM: bcm21664: Add board support. ARM: sunxi: Add the new watchog compatibles to the reboot code ARM: enable ARM_HAS_SG_CHAIN for multiplatform ARM: davinci: remove da8xx_omapl_defconfig ARM: davinci: da8xx: fix multiple watchdog device registration ARM: davinci: add da8xx specific configs to davinci_all_defconfig ARM: davinci: enable da8xx build concurrently with older devices ARM: BCM5301X: workaround suppress fault ARM: BCM5301X: add early debugging support ARM: BCM5301X: initial support for the BCM5301X/BCM470X SoCs with ARM CPU ARM: mach-bcm: Remove GENERIC_TIME ARM: shmobile: APMU: Fix warnings due to improper printk formats ...