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Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Allow caller to pass in a release function, there might be
other resources that need releasing as well. Needed for
network receive.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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* 'for-2.6.25' of git://git.kernel.dk/linux-2.6-block:
block: implement drain buffers
__bio_clone: don't calculate hw/phys segment counts
block: allow queue dma_alignment of zero
blktrace: Add blktrace ioctls to SCSI generic devices
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Currently you must be root to set idle io prio class on a process. This
is due to the fact that the idle class is implemented as a true idle
class, meaning that it will not make progress if someone else is
requesting disk access. Unfortunately this means that it opens DOS
opportunities by locking down file system resources, hence it is root
only at the moment.
This patch relaxes the idle class a little, by removing the truly idle
part (which entals a grace period with associated timer). The
modifications make the idle class as close to zero impact as can be done
while still guarenteeing progress. This means we can relax the root only
criteria as well.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Detach task state from ioc, instead keep track of how many processes
are accessing the ioc.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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This is where it belongs and then it doesn't take up space for a
process that doesn't do IO.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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If the users sets a new ->bi_bdev on the bio after __bio_clone() has
returned it, the "segment counts valid" flag still remains even though
it may be different with the new target. So don't calculate segment
counts in __bio_clone().
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
[CIFS] DFS build fixes
[CIFS] DFS support: provide shrinkable mounts
[CIFS] Do not log path names in lookup errors
[CIFS] DFS support patchset: Added mountdata
[CIFS] Forgot to add two new files from previous commit
[CIFS] DNS name resolution helper upcall for cifs
[CIFS] fix checkpatch warnings in fs/cifs/inode.c
[CIFS] hold ses sem on tcp session reconnect during mount
[CIFS] Allow setting mode via cifs acl
[CIFS] fix unicode string alignment in SPNEGO setup
[CIFS] cifs_partialpagewrite() cleanup
[CIFS] use krb5 session key from first SMB session after a NegProt
[CIFS] redo existing session setup if needed in cifs_mount
[CIFS] Only dump SPNEGO key if CONFIG_CIFS_DEBUG2 is set
[CIFS] fix SetEA failure to some Samba versions
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* 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.
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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
...
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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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>
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* 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
...
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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
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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>
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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>
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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"
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* 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
...
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Also includes a few minor changes suggested by Christoph
Signed-off-by: Steve French <sfrench@us.ibm.com>
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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>
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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>
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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>
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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>
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