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2008-01-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (200 commits) [SCSI] usbstorage: use last_sector_bug flag universally [SCSI] libsas: abstract STP task status into a function [SCSI] ultrastor: clean up inline asm warnings [SCSI] aic7xxx: fix firmware build [SCSI] aacraid: fib context lock for management ioctls [SCSI] ch: remove forward declarations [SCSI] ch: fix device minor number management bug [SCSI] ch: handle class_device_create failure properly [SCSI] NCR5380: fix section mismatch [SCSI] sg: fix /proc/scsi/sg/devices when no SCSI devices [SCSI] IB/iSER: add logical unit reset support [SCSI] don't use __GFP_DMA for sense buffers if not required [SCSI] use dynamically allocated sense buffer [SCSI] scsi.h: add macro for enclosure bit of inquiry data [SCSI] sd: add fix for devices with last sector access problems [SCSI] fix pcmcia compile problem [SCSI] aacraid: add Voodoo Lite class of cards. [SCSI] aacraid: add new driver features flags [SCSI] qla2xxx: Update version number to 8.02.00-k7. [SCSI] qla2xxx: Issue correct MBC_INITIALIZE_FIRMWARE command. ...
2008-01-25Merge branch 'upstream-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2 * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2: (31 commits) ocfs2: clean up bh null checks ocfs2: document access rules for blocked_lock_list configfs: file.c fix possible recursive locking configfs: dir.c fix possible recursive locking configfs: Remove EXPERIMENTAL ocfs2: bump version number ocfs2/dlm: Clear joining_node on hearbeat node down ocfs2: convert byte order of constant instead of variable ocfs2: Update default cluster timeouts ocfs2: printf fixes ocfs2: Use generic_file_llseek ocfs2: Safer read_inline_data() ocfs2: Silence false lockdep warnings [PATCH 2/2] ocfs2: cluster aware flock() [PATCH 1/2] ocfs2: add flock lock type ocfs2: Local alloc window size changeable via mount option ocfs2: Support commit= mount option ocfs2: Add missing permission checks [PATCH 2/2] ocfs2: Implement group add for online resize [PATCH 1/2] ocfs2: Add group extend for online resize ...
2008-01-25ocfs2: clean up bh null checksMark Fasheh
If we know a buffer_head is non-null, then brelse() is unnecessary and put_bh() can be used instead. Also, an explicit check for NULL is unnecessary when using brelse(). This patch only covers buffer_head_io.c and resize.c, which have recently added code which exhibits this problem. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: document access rules for blocked_lock_listMark Fasheh
ocfs2_super->blocked_lock_list and ocfs2_super->blocked_lock_count have some usage restrictions which aren't immediately obvious to anyone reading the code. It's a good idea to document this so that we avoid making costly mistakes in the future. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25configfs: file.c fix possible recursive lockingJoonwoo Park
configfs_register_subsystem() with default_groups triggers recursive locking. it seems that mutex_lock_nested is needed. ============================================= [ INFO: possible recursive locking detected ] 2.6.24-rc6 #145 --------------------------------------------- swapper/1 is trying to acquire lock: (&sb->s_type->i_mutex_key#3){--..}, at: [<c40c9a9e>] configfs_add_file+0x2e/0x70 but task is already holding lock: (&sb->s_type->i_mutex_key#3){--..}, at: [<c40ca985>] configfs_register_subsystem+0x55/0x130 other info that might help us debug this: 1 lock held by swapper/1: #0: (&sb->s_type->i_mutex_key#3){--..}, at: [<c40ca985>] configfs_register_subsystem+0x55/0x130 stack backtrace: Pid: 1, comm: swapper Not tainted 2.6.24-rc6 #145 [<c40053ba>] show_trace_log_lvl+0x1a/0x30 [<c4005e82>] show_trace+0x12/0x20 [<c400687e>] dump_stack+0x6e/0x80 [<c404ec72>] __lock_acquire+0xe62/0x1120 [<c404efb2>] lock_acquire+0x82/0xa0 [<c43fda88>] mutex_lock_nested+0x98/0x2e0 [<c40c9a9e>] configfs_add_file+0x2e/0x70 [<c40c9b0c>] configfs_create_file+0x2c/0x40 [<c40ca639>] configfs_attach_item+0x139/0x220 [<c40ca734>] configfs_attach_group+0x14/0x140 [<c40ca7e9>] configfs_attach_group+0xc9/0x140 [<c40ca9f6>] configfs_register_subsystem+0xc6/0x130 [<c45c8186>] init_netconsole+0x2b6/0x300 [<c45a75f2>] kernel_init+0x142/0x320 [<c4004fb3>] kernel_thread_helper+0x7/0x14 ======================= Signed-off-by: Joonwoo Park <joonwpark81@gmail.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25configfs: dir.c fix possible recursive lockingJoonwoo Park
configfs_register_subsystem() with default_groups triggers recursive locking. it seems that mutex_lock_nested is needed. ============================================= [ INFO: possible recursive locking detected ] 2.6.24-rc6 #141 --------------------------------------------- swapper/1 is trying to acquire lock: (&sb->s_type->i_mutex_key#3){--..}, at: [<c40ca76f>] configfs_attach_group+0x4f/0x190 but task is already holding lock: (&sb->s_type->i_mutex_key#3){--..}, at: [<c40ca9d5>] configfs_register_subsystem+0x55/0x130 other info that might help us debug this: 1 lock held by swapper/1: #0: (&sb->s_type->i_mutex_key#3){--..}, at: [<c40ca9d5>] configfs_register_subsystem+0x55/0x130 stack backtrace: Pid: 1, comm: swapper Not tainted 2.6.24-rc6 #141 [<c40053ba>] show_trace_log_lvl+0x1a/0x30 [<c4005e82>] show_trace+0x12/0x20 [<c400687e>] dump_stack+0x6e/0x80 [<c404ec72>] __lock_acquire+0xe62/0x1120 [<c404efb2>] lock_acquire+0x82/0xa0 [<c43fdad8>] mutex_lock_nested+0x98/0x2e0 [<c40ca76f>] configfs_attach_group+0x4f/0x190 [<c40caa46>] configfs_register_subsystem+0xc6/0x130 [<c45c8186>] init_netconsole+0x2b6/0x300 [<c45a75f2>] kernel_init+0x142/0x320 [<c4004fb3>] kernel_thread_helper+0x7/0x14 ======================= Signed-off-by: Joonwoo Park <joonwpark81@gmail.com> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25configfs: Remove EXPERIMENTALJoel Becker
configfs has been alive and kicking for a while now. It underpins some non-EXPERIMENTAL subsystems, such as OCFS2's cluster stack. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: bump version numberMark Fasheh
Bump the printed version to 1.5.0. This helps us quickly identify which version of Ocfs2 a bug filer is running. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2/dlm: Clear joining_node on hearbeat node downTao Ma
Currently the process of dlm join contains 2 steps: query join and assert join. After query join, the joined node will set its joining_node. So if the joining node happens to panic before the 2nd step, the joined node will fail to clear its joining_node flag because that node isn't in the domain map. It at least cause 2 problems. 1. All the new join request will fail. So no new node can mount the volume. 2. The joined node can't umount the volume since during the umount process it has to wait for the joining_node to be unknown. So the umount will be hanged. The solution is to clear the joining_node before we check the domain map. Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: convert byte order of constant instead of variableMarcin Slusarz
Convert byte order of constant instead of variable it will be done at compile time vs run time. Remove unused le32_and_cpu. Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: Update default cluster timeoutsSunil Mushran
Lots of people are having trouble with the default timeouts, which are too low. These new values are derived from an informal survey taken on ocfs2-users, as well as data from bug reports. This should reduce the amount of cluster disconnects and subsequent fencing seen during normal workloads. Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: printf fixesJan Kara
Explicitely convert loff_t to long long in printf. Just for sure... Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: Use generic_file_llseekJan Kara
We should use generic_file_llseek() and not default_llseek() so that s_maxbytes gets properly checked when seeking. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: Safer read_inline_data()Jan Kara
In ocfs2_read_inline_data() we should store file size in loff_t. Although the file size should fit in 32 bits we cannot be sure in case filesystem is corrupted. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: Silence false lockdep warningsJan Kara
Create separate lockdep lock classes for system file's i_mutexes. They are used to guard allocations and similar things and thus rank differently than i_mutex of a regular file or directory. Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25[PATCH 2/2] ocfs2: cluster aware flock()Mark Fasheh
Hook up ocfs2_flock(), using the new flock lock type in dlmglue.c. A new mount option, "localflocks" is added so that users can revert to old functionality as need be. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25[PATCH 1/2] ocfs2: add flock lock typeMark Fasheh
This adds a new dlmglue lock type which is intended to back flock() requests. Since these locks are driven from userspace, usage rules are much more liberal than the typical Ocfs2 internal cluster lock. As a result, we can't make use of most dlmglue features - lock caching and lock level optimizations in particular. Additionally, userspace is free to deadlock itself, so we have to deal with that in the same way as the rest of the kernel - by allowing a signal to abort a lock request. In order to keep ocfs2_cluster_lock() complexity down, ocfs2_file_lock() does it's own dlm coordination. We still use the same helper functions though, so duplicated code is kept to a minimum. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: Local alloc window size changeable via mount optionSunil Mushran
Local alloc is a performance optimization in ocfs2 in which a node takes a window of bits from the global bitmap and then uses that for all small local allocations. This window size is fixed to 8MB currently. This patch allows users to specify the window size in MB including disabling it by passing in 0. If the number specified is too large, the fs will use the default value of 8MB. mount -o localalloc=X /dev/sdX /mntpoint Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: Support commit= mount optionMark Fasheh
Mostly taken from ext3. This allows the user to set the jbd commit interval, in seconds. The default of 5 seconds stays the same, but now users can easily increase the commit interval. Typically, this would be increased in order to benefit performance at the expense of data-safety. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: Add missing permission checksMark Fasheh
Check that an online resize is being driven by a user with permission to change system resource limits. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25[PATCH 2/2] ocfs2: Implement group add for online resizeTao Ma
This patch adds the ability for a userspace program to request that a properly formatted cluster group be added to the main allocation bitmap for an Ocfs2 file system. The request is made via an ioctl, OCFS2_IOC_GROUP_ADD. On a high level, this is similar to ext3, but we use a different ioctl as the structure which has to be passed through is different. During an online resize, tunefs.ocfs2 will format any new cluster groups which must be added to complete the resize, and call OCFS2_IOC_GROUP_ADD on each one. Kernel verifies that the core cluster group information is valid and then does the work of linking it into the global allocation bitmap. Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25[PATCH 1/2] ocfs2: Add group extend for online resizeTao Ma
This patch adds the ability for a userspace program to request an extend of last cluster group on an Ocfs2 file system. The request is made via ioctl, OCFS2_IOC_GROUP_EXTEND. This is derived from EXT3_IOC_GROUP_EXTEND, but is obviously Ocfs2 specific. tunefs.ocfs2 would call this for an online-resize operation if the last cluster group isn't full. Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: Initalize bitmap_cpg of ocfs2_super to be the maximum.Tao Ma
This value is initialized from global_bitmap->id2.i_chain.cl_cpg. If there is only 1 group, it will be equal to the total clusters in the volume. So as for online resize, it should change for all the nodes in the cluster. It isn't easy and there is no corresponding lock for it. bitmap_cpg is only used in 2 areas: 1. Check whether the suballoc is too large for us to allocate from the global bitmap, so it is little used. And now the suballoc size is 2048, it rarely meet this situation and the check is almost useless. 2. Calculate which group a cluster belongs to. We use it during truncate to figure out which cluster group an extent belongs too. But we should be OK if we increase it though as the cluster group calculated shouldn't change and we only ever have a small bitmap_cpg on file systems with a single cluster group. Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: Documentation updateMark Fasheh
Remove 'readpages' from the list in ocfs2.txt. Instead of having two identical lists, I just removed the list in the OCFS2 section of fs/Kconfig and added a pointer to Documentation/filesystems/ocfs2.txt. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: Readpages supportMark Fasheh
Add ->readpages support to Ocfs2. This is rather trivial - all it required is a small update to ocfs2_get_block (for mapping full extents via b_size) and an ocfs2_readpages() function which partially mirrors ocfs2_readpage(). Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: Rename ocfs2_meta_[un]lockMark Fasheh
Call this the "inode_lock" now, since it covers both data and meta data. This patch makes no functional changes. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: Remove data locksMark Fasheh
The meta lock now covers both meta data and data, so this just removes the now-redundant data lock. Combining locks saves us a round of lock mastery per inode and one less lock to ping between nodes during read/write. We don't lose much - since meta locks were always held before a data lock (and at the same level) ordered writeout mode (the default) ensured that flushing for the meta data lock also pushed out data anyways. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: Add data downconvert worker to inode lockMark Fasheh
In order to extend inode lock coverage to inode data, we use the same data downconvert worker with only a small modification to only do work for regular files. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: Remove mount/unmount votesMark Fasheh
The node maps that are set/unset by these votes are no longer relevant, thus we can remove the mount and umount votes. Since those are the last two remaining votes, we can also remove the entire vote infrastructure. The vote thread has been renamed to the downconvert thread, and the small amount of functionality related to managing it has been moved into fs/ocfs2/dlmglue.c. All references to votes have been removed or updated. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2: Remove fs dependency on ocfs2_heartbeat moduleMark Fasheh
Now that the dlm exposes domain information to us, we don't need generic node up / node down callbacks. And since the DLM is only telling us when a node goes down unexpectedly, we no longer need to optimize away node down callbacks via the umount map. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25ocfs2_dlm: Call node eviction callbacks from heartbeat handlerMark Fasheh
With this, a dlm client can take advantage of the group protocol in the dlm to get full notification whenever a node within the dlm domain leaves unexpectedly. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
2008-01-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-schedLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched: (96 commits) sched: keep total / count stats in addition to the max for sched, futex: detach sched.h and futex.h sched: fix: don't take a mutex from interrupt context sched: print backtrace of running tasks too printk: use ktime_get() softlockup: fix signedness sched: latencytop support sched: fix goto retry in pick_next_task_rt() timers: don't #error on higher HZ values sched: monitor clock underflows in /proc/sched_debug sched: fix rq->clock warps on frequency changes sched: fix, always create kernel threads with normal priority debug: clean up kernel/profile.c sched: remove the !PREEMPT_BKL code sched: make PREEMPT_BKL the default debug: track and print last unloaded module in the oops trace debug: show being-loaded/being-unloaded indicator for modules sched: rt-watchdog: fix .rlim_max = RLIM_INFINITY sched: rt-group: reduce rescheduling hrtimer: unlock hrtimer_wakeup ...
2008-01-25Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6: mount options: fix jfs JFS: simplify types to get rid of sparse warning JFS: FIx one more plain integer as NULL pointer warning JFS: Remove defconfig ptr comparison to 0 JFS: use DIV_ROUND_UP where appropriate Remove unnecessary kmalloc casts in the jfs filesystem JFS is missing a memory barrier JFS: Make sure special inode data is written after journal is flushed JFS: clear PAGECACHE_TAG_DIRTY for no-write pages
2008-01-25sched: latencytop supportArjan van de Ven
LatencyTOP kernel infrastructure; it measures latencies in the scheduler and tracks it system wide and per process. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-25Preempt-RCU: implementationPaul E. McKenney
This patch implements a new version of RCU which allows its read-side critical sections to be preempted. It uses a set of counter pairs to keep track of the read-side critical sections and flips them when all tasks exit read-side critical section. The details of this implementation can be found in this paper - http://www.rdrop.com/users/paulmck/RCU/OLSrtRCU.2006.08.11a.pdf and the article- http://lwn.net/Articles/253651/ This patch was developed as a part of the -rt kernel development and meant to provide better latencies when read-side critical sections of RCU don't disable preemption. As a consequence of keeping track of RCU readers, the readers have a slight overhead (optimizations in the paper). This implementation co-exists with the "classic" RCU implementations and can be switched to at compiler. Also includes RCU tracing summarized in debugfs. [ akpm@linux-foundation.org: build fixes on non-preempt architectures ] Signed-off-by: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com> Signed-off-by: Paul E. McKenney <paulmck@us.ibm.com> Reviewed-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-25Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/selinux-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/selinux-2.6: selinux: make mls_compute_sid always polyinstantiate security/selinux: constify function pointer tables and fields security: add a secctx_to_secid() hook security: call security_file_permission from rw_verify_area security: remove security_sb_post_mountroot hook Security: remove security.h include from mm.h Security: remove security_file_mmap hook sparse-warnings (NULL as 0). Security: add get, set, and cloning of superblock security information security/selinux: Add missing "space"
2008-01-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmwLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw: (56 commits) [GFS2] Allow journal recovery on read-only mount [GFS2] Lockup on error [GFS2] Fix page_mkwrite truncation race path [GFS2] Fix typo [GFS2] Fix write alloc required shortcut calculation [GFS2] gfs2_alloc_required performance [GFS2] Remove unneeded i_spin [GFS2] Reduce inode size by moving i_alloc out of line [GFS2] Fix assert in log code [GFS2] Fix problems relating to execution of files on GFS2 [GFS2] Initialize extent_list earlier [GFS2] Allow page migration for writeback and ordered pages [GFS2] Remove unused variable [GFS2] Fix log block mapper [GFS2] Minor correction [GFS2] Eliminate the no longer needed sd_statfs_mutex [GFS2] Incremental patch to fix compiler warning [GFS2] Function meta_read optimization [GFS2] Only fetch the dinode once in block_map [GFS2] Reorganize function gfs2_glmutex_lock ...
2008-01-25[GFS2] Allow journal recovery on read-only mountAbhijith Das
This patch allows gfs2 to perform journal recovery even if it is mounted read-only. Strictly speaking, a read-only mount should not be writing to the filesystem, but we do this only to perform journal recovery. A read-only mount will fail if we don't recover the dirty journal. Also, when gfs2 is used as a root filesystem, it will be mounted read-only before being mounted read-write during the boot sequence. A failed read-only mount will panic the machine during bootup. Signed-off-by: Abhijith Das <adas@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2008-01-25[GFS2] Lockup on errorBob Peterson
I spotted this bug while I was digging around. Looks like it could cause a lockup in some rare error condition. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2008-01-25[GFS2] Fix page_mkwrite truncation race pathSteven Whitehouse
There was a bug in the truncation/invalidation race path for ->page_mkwrite for gfs2. It ought to return 0 so that the effect is the same as if the page was truncated at any of the other points at which the page_lock is dropped. This will result in the restart of the whole page fault path. If it was due to a real truncation (as opposed to an invalidate because we let a glock go) then the ->fault path will pick that up when it gets called again. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2008-01-25[GFS2] Fix typoBob Peterson
This patch fixes a minor typo. Surprisingly, it still compiled. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2008-01-25[GFS2] Fix write alloc required shortcut calculationSteven Whitehouse
The comparison was being made against the wrong quantity. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2008-01-25[GFS2] gfs2_alloc_required performanceBob Peterson
This is a small I/O performance enhancement to gfs2. (Actually, it is a rework of an earlier version I got wrong). The idea here is to check if the write extends past the last block in the file. If so, the function can save itself a lot of time and trouble because it knows an allocate will be required. Benchmarks like iozone should see better performance. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2008-01-25[GFS2] Remove unneeded i_spinBob Peterson
This patch removes a vestigial variable "i_spin" from the gfs2_inode structure. This not only saves us memory (>300000 of these in memory for the oom test) it also saves us time because we don't have to spend time initializing it (i.e. slightly better performance). Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2008-01-25[GFS2] Reduce inode size by moving i_alloc out of lineSteven Whitehouse
It is possible to reduce the size of GFS2 inodes by taking the i_alloc structure out of the gfs2_inode. This patch allocates the i_alloc structure whenever its needed, and frees it afterward. This decreases the amount of low memory we use at the expense of requiring a memory allocation for each page or partial page that we write. A quick test with postmark shows that the overhead is not measurable and I also note that OCFS2 use the same approach. In the future I'd like to solve the problem by shrinking down the size of the members of the i_alloc structure, but for now, this reduces the immediate problem of using too much low-memory on x86 and doesn't add too much overhead. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2008-01-25[GFS2] Fix assert in log codeSteven Whitehouse
Although the values were all being calculated correctly, there was a race in the assert due to the way it was using atomic variables. This changes the value we assert on so that we get the same effect by testing a different variable. This prevents the assert triggering when it shouldn't. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2008-01-25[GFS2] Fix problems relating to execution of files on GFS2Steven Whitehouse
This patch fixes a couple of problems which affected the execution of files on GFS2. The first is that there was a corner case where inodes were not always uptodate at the point at which permissions checks were being carried out, this was resulting in refusal of execute permission, but only on the first lookup, subsequent requests worked correctly. The second was a problem relating to incorrect updating of file sizes which was introduced with the write_begin/end code for GFS2 a little while back. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Abhijith Das <adas@redhat.com>
2008-01-25[GFS2] Initialize extent_list earlierBob Peterson
Here is a patch for the latest upstream GFS2 code: The journal extent map needs to be initialized sooner than it currently is. Otherwise failed mount attempts (e.g. not enough journals, etc.) may panic trying to access the uninitialized list. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2008-01-25[GFS2] Allow page migration for writeback and ordered pagesSteven Whitehouse
To improve performance on NUMA, we use the VM's standard page migration for writeback and ordered pages. Probably we could also do the same for journaled data, but that would need a careful audit of the code, so will be the subject of a later patch. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2008-01-25[GFS2] Remove unused variableSteven Whitehouse
The go_drop_th function is never called or referenced. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>