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2010-01-05Merge branch 'upstream-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2 * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2: ocfs2: Handle O_DIRECT when writing to a refcounted cluster.
2010-01-04sysfs: Add lockdep annotations for the sysfs active referenceEric W. Biederman
Holding locks over device_del -> kobject_del -> sysfs_deactivate can cause deadlocks if those same locks are grabbed in sysfs show or store methods. The I model s_active count + completion as a sleeping read/write lock. I describe to lockdep sysfs_get_active as a read_trylock, sysfs_put_active as a read_unlock, and sysfs_deactivate as a write_lock and write_unlock pair. This seems to capture the essence for purposes of finding deadlocks, and in my testing gives finds real issues and ignores non-issues. This brings us back to holding locks over kobject_del is a problem that ideally we should find a way of addressing, but at least lockdep can tell us about the problems instead of requiring developers to debug rare strange system deadlocks, that happen when sysfs files are removed while being written to. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-01-04Merge branch 'sh/for-2.6.33' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 * 'sh/for-2.6.33' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: binfmt_elf_fdpic: Fix build breakage introduced by coredump changes. sh: update defconfigs. sh: Don't default enable PMB support. sh: Disable PMB for SH4AL-DSP CPUs. sh: Only provide a PCLK definition for legacy CPG CPUs.
2010-01-04Merge branch 'for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: Calculate metadata requirements more accurately ext4: Fix accounting of reserved metadata blocks
2010-01-04Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2: nilfs2: update mailing list address nilfs2: Storage class should be before const qualifier nilfs2: trivial coding style fix
2010-01-04binfmt_elf_fdpic: Fix build breakage introduced by coredump changes.Daisuke HATAYAMA
Commit f6151dfea21496d43dbaba32cfcd9c9f404769bc introduces build breakage, so this patch fixes it together with some printk formatting cleanup. Signed-off-by: Daisuke HATAYAMA <d.hatayama@jp.fujitsu.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-01-02Merge branch 'reiserfs/kill-bkl' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing * 'reiserfs/kill-bkl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing: reiserfs: Safely acquire i_mutex from xattr_rmdir reiserfs: Safely acquire i_mutex from reiserfs_for_each_xattr reiserfs: Fix journal mutex <-> inode mutex lock inversion reiserfs: Fix unwanted recursive reiserfs lock in reiserfs_unlink() reiserfs: Relax lock before open xattr dir in reiserfs_xattr_set_handle() reiserfs: Relax reiserfs lock while freeing the journal reiserfs: Fix reiserfs lock <-> i_mutex dependency inversion on xattr reiserfs: Warn on lock relax if taken recursively reiserfs: Fix reiserfs lock <-> i_xattr_sem dependency inversion reiserfs: Fix remaining in-reclaim-fs <-> reclaim-fs-on locking inversion reiserfs: Fix reiserfs lock <-> inode mutex dependency inversion reiserfs: Fix reiserfs lock and journal lock inversion dependency reiserfs: Fix possible recursive lock
2010-01-02writeback: add missing kernel-doc notationJaswinder Singh Rajput
Fix the following htmldocs warning: Warning(fs/fs-writeback.c:255): No description found for parameter 'sb' Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Jan Kara <jack@suse.cz> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-01-02reiserfs: Safely acquire i_mutex from xattr_rmdirFrederic Weisbecker
Relax the reiserfs lock before taking the inode mutex from xattr_rmdir() to avoid the usual reiserfs lock <-> inode mutex bad dependency. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Tested-by: Christian Kujau <lists@nerdbynature.de> Cc: Alexander Beregalov <a.beregalov@gmail.com> Cc: Chris Mason <chris.mason@oracle.com> Cc: Ingo Molnar <mingo@elte.hu>
2010-01-02reiserfs: Safely acquire i_mutex from reiserfs_for_each_xattrFrederic Weisbecker
Relax the reiserfs lock before taking the inode mutex from reiserfs_for_each_xattr() to avoid the usual bad dependencies: ======================================================= [ INFO: possible circular locking dependency detected ] 2.6.32-atom #179 ------------------------------------------------------- rm/3242 is trying to acquire lock: (&sb->s_type->i_mutex_key#4/3){+.+.+.}, at: [<c11428ef>] reiserfs_for_each_xattr+0x23f/0x290 but task is already holding lock: (&REISERFS_SB(s)->lock){+.+.+.}, at: [<c1143389>] reiserfs_write_lock+0x29/0x40 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&REISERFS_SB(s)->lock){+.+.+.}: [<c105ea7f>] __lock_acquire+0x11ff/0x19e0 [<c105f2c8>] lock_acquire+0x68/0x90 [<c1401aab>] mutex_lock_nested+0x5b/0x340 [<c1143339>] reiserfs_write_lock_once+0x29/0x50 [<c1117022>] reiserfs_lookup+0x62/0x140 [<c10bd85f>] __lookup_hash+0xef/0x110 [<c10bf21d>] lookup_one_len+0x8d/0xc0 [<c1141e3a>] open_xa_dir+0xea/0x1b0 [<c1142720>] reiserfs_for_each_xattr+0x70/0x290 [<c11429ba>] reiserfs_delete_xattrs+0x1a/0x60 [<c111ea2f>] reiserfs_delete_inode+0x9f/0x150 [<c10c9c32>] generic_delete_inode+0xa2/0x170 [<c10c9d4f>] generic_drop_inode+0x4f/0x70 [<c10c8b07>] iput+0x47/0x50 [<c10c0965>] do_unlinkat+0xd5/0x160 [<c10c0b13>] sys_unlinkat+0x23/0x40 [<c1002ec4>] sysenter_do_call+0x12/0x32 -> #0 (&sb->s_type->i_mutex_key#4/3){+.+.+.}: [<c105f176>] __lock_acquire+0x18f6/0x19e0 [<c105f2c8>] lock_acquire+0x68/0x90 [<c1401aab>] mutex_lock_nested+0x5b/0x340 [<c11428ef>] reiserfs_for_each_xattr+0x23f/0x290 [<c11429ba>] reiserfs_delete_xattrs+0x1a/0x60 [<c111ea2f>] reiserfs_delete_inode+0x9f/0x150 [<c10c9c32>] generic_delete_inode+0xa2/0x170 [<c10c9d4f>] generic_drop_inode+0x4f/0x70 [<c10c8b07>] iput+0x47/0x50 [<c10c0965>] do_unlinkat+0xd5/0x160 [<c10c0b13>] sys_unlinkat+0x23/0x40 [<c1002ec4>] sysenter_do_call+0x12/0x32 other info that might help us debug this: 1 lock held by rm/3242: #0: (&REISERFS_SB(s)->lock){+.+.+.}, at: [<c1143389>] reiserfs_write_lock+0x29/0x40 stack backtrace: Pid: 3242, comm: rm Not tainted 2.6.32-atom #179 Call Trace: [<c13ffa13>] ? printk+0x18/0x1a [<c105d33a>] print_circular_bug+0xca/0xd0 [<c105f176>] __lock_acquire+0x18f6/0x19e0 [<c105c932>] ? mark_held_locks+0x62/0x80 [<c105cc3b>] ? trace_hardirqs_on+0xb/0x10 [<c1401098>] ? mutex_unlock+0x8/0x10 [<c105f2c8>] lock_acquire+0x68/0x90 [<c11428ef>] ? reiserfs_for_each_xattr+0x23f/0x290 [<c11428ef>] ? reiserfs_for_each_xattr+0x23f/0x290 [<c1401aab>] mutex_lock_nested+0x5b/0x340 [<c11428ef>] ? reiserfs_for_each_xattr+0x23f/0x290 [<c11428ef>] reiserfs_for_each_xattr+0x23f/0x290 [<c1143180>] ? delete_one_xattr+0x0/0x100 [<c11429ba>] reiserfs_delete_xattrs+0x1a/0x60 [<c1143339>] ? reiserfs_write_lock_once+0x29/0x50 [<c111ea2f>] reiserfs_delete_inode+0x9f/0x150 [<c11b0d4f>] ? _atomic_dec_and_lock+0x4f/0x70 [<c111e990>] ? reiserfs_delete_inode+0x0/0x150 [<c10c9c32>] generic_delete_inode+0xa2/0x170 [<c10c9d4f>] generic_drop_inode+0x4f/0x70 [<c10c8b07>] iput+0x47/0x50 [<c10c0965>] do_unlinkat+0xd5/0x160 [<c1401098>] ? mutex_unlock+0x8/0x10 [<c10c3e0d>] ? vfs_readdir+0x7d/0xb0 [<c10c3af0>] ? filldir64+0x0/0xf0 [<c1002ef3>] ? sysenter_exit+0xf/0x16 [<c105cbe4>] ? trace_hardirqs_on_caller+0x124/0x170 [<c10c0b13>] sys_unlinkat+0x23/0x40 [<c1002ec4>] sysenter_do_call+0x12/0x32 Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Tested-by: Christian Kujau <lists@nerdbynature.de> Cc: Alexander Beregalov <a.beregalov@gmail.com> Cc: Chris Mason <chris.mason@oracle.com> Cc: Ingo Molnar <mingo@elte.hu>
2010-01-02reiserfs: Fix journal mutex <-> inode mutex lock inversionFrederic Weisbecker
We need to relax the reiserfs lock before locking the inode mutex from xattr_unlink(), otherwise we'll face the usual bad dependencies: ======================================================= [ INFO: possible circular locking dependency detected ] 2.6.32-atom #178 ------------------------------------------------------- rm/3202 is trying to acquire lock: (&journal->j_mutex){+.+...}, at: [<c113c234>] do_journal_begin_r+0x94/0x360 but task is already holding lock: (&sb->s_type->i_mutex_key#4/2){+.+...}, at: [<c1142a67>] xattr_unlink+0x57/0xb0 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&sb->s_type->i_mutex_key#4/2){+.+...}: [<c105ea7f>] __lock_acquire+0x11ff/0x19e0 [<c105f2c8>] lock_acquire+0x68/0x90 [<c1401a7b>] mutex_lock_nested+0x5b/0x340 [<c1142a67>] xattr_unlink+0x57/0xb0 [<c1143179>] delete_one_xattr+0x29/0x100 [<c11427bb>] reiserfs_for_each_xattr+0x10b/0x290 [<c11429ba>] reiserfs_delete_xattrs+0x1a/0x60 [<c111ea2f>] reiserfs_delete_inode+0x9f/0x150 [<c10c9c32>] generic_delete_inode+0xa2/0x170 [<c10c9d4f>] generic_drop_inode+0x4f/0x70 [<c10c8b07>] iput+0x47/0x50 [<c10c0965>] do_unlinkat+0xd5/0x160 [<c10c0b13>] sys_unlinkat+0x23/0x40 [<c1002ec4>] sysenter_do_call+0x12/0x32 -> #1 (&REISERFS_SB(s)->lock){+.+.+.}: [<c105ea7f>] __lock_acquire+0x11ff/0x19e0 [<c105f2c8>] lock_acquire+0x68/0x90 [<c1401a7b>] mutex_lock_nested+0x5b/0x340 [<c1143359>] reiserfs_write_lock+0x29/0x40 [<c113c23c>] do_journal_begin_r+0x9c/0x360 [<c113c680>] journal_begin+0x80/0x130 [<c1127363>] reiserfs_remount+0x223/0x4e0 [<c10b6dd6>] do_remount_sb+0xa6/0x140 [<c10ce6a0>] do_mount+0x560/0x750 [<c10ce914>] sys_mount+0x84/0xb0 [<c1002ec4>] sysenter_do_call+0x12/0x32 -> #0 (&journal->j_mutex){+.+...}: [<c105f176>] __lock_acquire+0x18f6/0x19e0 [<c105f2c8>] lock_acquire+0x68/0x90 [<c1401a7b>] mutex_lock_nested+0x5b/0x340 [<c113c234>] do_journal_begin_r+0x94/0x360 [<c113c680>] journal_begin+0x80/0x130 [<c1116d63>] reiserfs_unlink+0x83/0x2e0 [<c1142a74>] xattr_unlink+0x64/0xb0 [<c1143179>] delete_one_xattr+0x29/0x100 [<c11427bb>] reiserfs_for_each_xattr+0x10b/0x290 [<c11429ba>] reiserfs_delete_xattrs+0x1a/0x60 [<c111ea2f>] reiserfs_delete_inode+0x9f/0x150 [<c10c9c32>] generic_delete_inode+0xa2/0x170 [<c10c9d4f>] generic_drop_inode+0x4f/0x70 [<c10c8b07>] iput+0x47/0x50 [<c10c0965>] do_unlinkat+0xd5/0x160 [<c10c0b13>] sys_unlinkat+0x23/0x40 [<c1002ec4>] sysenter_do_call+0x12/0x32 other info that might help us debug this: 2 locks held by rm/3202: #0: (&sb->s_type->i_mutex_key#4/3){+.+.+.}, at: [<c114274b>] reiserfs_for_each_xattr+0x9b/0x290 #1: (&sb->s_type->i_mutex_key#4/2){+.+...}, at: [<c1142a67>] xattr_unlink+0x57/0xb0 stack backtrace: Pid: 3202, comm: rm Not tainted 2.6.32-atom #178 Call Trace: [<c13ff9e3>] ? printk+0x18/0x1a [<c105d33a>] print_circular_bug+0xca/0xd0 [<c105f176>] __lock_acquire+0x18f6/0x19e0 [<c1142a67>] ? xattr_unlink+0x57/0xb0 [<c105f2c8>] lock_acquire+0x68/0x90 [<c113c234>] ? do_journal_begin_r+0x94/0x360 [<c113c234>] ? do_journal_begin_r+0x94/0x360 [<c1401a7b>] mutex_lock_nested+0x5b/0x340 [<c113c234>] ? do_journal_begin_r+0x94/0x360 [<c113c234>] do_journal_begin_r+0x94/0x360 [<c10411b6>] ? run_timer_softirq+0x1a6/0x220 [<c103cb00>] ? __do_softirq+0x50/0x140 [<c113c680>] journal_begin+0x80/0x130 [<c103cba2>] ? __do_softirq+0xf2/0x140 [<c104f72f>] ? hrtimer_interrupt+0xdf/0x220 [<c1116d63>] reiserfs_unlink+0x83/0x2e0 [<c105c932>] ? mark_held_locks+0x62/0x80 [<c11b8d08>] ? trace_hardirqs_on_thunk+0xc/0x10 [<c1002fd8>] ? restore_all_notrace+0x0/0x18 [<c1142a67>] ? xattr_unlink+0x57/0xb0 [<c1142a74>] xattr_unlink+0x64/0xb0 [<c1143179>] delete_one_xattr+0x29/0x100 [<c11427bb>] reiserfs_for_each_xattr+0x10b/0x290 [<c1143150>] ? delete_one_xattr+0x0/0x100 [<c1401cb9>] ? mutex_lock_nested+0x299/0x340 [<c11429ba>] reiserfs_delete_xattrs+0x1a/0x60 [<c1143309>] ? reiserfs_write_lock_once+0x29/0x50 [<c111ea2f>] reiserfs_delete_inode+0x9f/0x150 [<c11b0d1f>] ? _atomic_dec_and_lock+0x4f/0x70 [<c111e990>] ? reiserfs_delete_inode+0x0/0x150 [<c10c9c32>] generic_delete_inode+0xa2/0x170 [<c10c9d4f>] generic_drop_inode+0x4f/0x70 [<c10c8b07>] iput+0x47/0x50 [<c10c0965>] do_unlinkat+0xd5/0x160 [<c1401068>] ? mutex_unlock+0x8/0x10 [<c10c3e0d>] ? vfs_readdir+0x7d/0xb0 [<c10c3af0>] ? filldir64+0x0/0xf0 [<c1002ef3>] ? sysenter_exit+0xf/0x16 [<c105cbe4>] ? trace_hardirqs_on_caller+0x124/0x170 [<c10c0b13>] sys_unlinkat+0x23/0x40 [<c1002ec4>] sysenter_do_call+0x12/0x32 Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Tested-by: Christian Kujau <lists@nerdbynature.de> Cc: Alexander Beregalov <a.beregalov@gmail.com> Cc: Chris Mason <chris.mason@oracle.com> Cc: Ingo Molnar <mingo@elte.hu>
2010-01-02reiserfs: Fix unwanted recursive reiserfs lock in reiserfs_unlink()Frederic Weisbecker
reiserfs_unlink() may or may not be called under the reiserfs lock. But it also takes the reiserfs lock and can then acquire it recursively which leads to do_journal_begin_r() that fails to relax the reiserfs lock before grabbing the journal mutex, creating an unexpected lock inversion. We need to ensure reiserfs_unlink() won't get the reiserfs lock recursively using reiserfs_write_lock_once(). This fixes the following warning that precedes a lock inversion report (reiserfs lock <-> journal mutex). ------------[ cut here ]------------ WARNING: at fs/reiserfs/lock.c:95 reiserfs_lock_check_recursive+0x3a/0x50() Hardware name: MS-7418 Unwanted recursive reiserfs lock! Pid: 3208, comm: dbench Not tainted 2.6.32-atom #177 Call Trace: [<c114327a>] ? reiserfs_lock_check_recursive+0x3a/0x50 [<c114327a>] ? reiserfs_lock_check_recursive+0x3a/0x50 [<c10373a7>] warn_slowpath_common+0x67/0xc0 [<c114327a>] ? reiserfs_lock_check_recursive+0x3a/0x50 [<c1037446>] warn_slowpath_fmt+0x26/0x30 [<c114327a>] reiserfs_lock_check_recursive+0x3a/0x50 [<c113c213>] do_journal_begin_r+0x83/0x360 [<c105eb16>] ? __lock_acquire+0x1296/0x19e0 [<c1142a57>] ? xattr_unlink+0x57/0xb0 [<c113c670>] journal_begin+0x80/0x130 [<c1116d5d>] reiserfs_unlink+0x7d/0x2d0 [<c1142a57>] ? xattr_unlink+0x57/0xb0 [<c1142a57>] ? xattr_unlink+0x57/0xb0 [<c1142a57>] ? xattr_unlink+0x57/0xb0 [<c1142a64>] xattr_unlink+0x64/0xb0 [<c1143169>] delete_one_xattr+0x29/0x100 [<c11427ab>] reiserfs_for_each_xattr+0x10b/0x290 [<c1143140>] ? delete_one_xattr+0x0/0x100 [<c1401ca9>] ? mutex_lock_nested+0x299/0x340 [<c11429aa>] reiserfs_delete_xattrs+0x1a/0x60 [<c11432f9>] ? reiserfs_write_lock_once+0x29/0x50 [<c111ea1f>] reiserfs_delete_inode+0x9f/0x150 [<c11b0d0f>] ? _atomic_dec_and_lock+0x4f/0x70 [<c111e980>] ? reiserfs_delete_inode+0x0/0x150 [<c10c9c32>] generic_delete_inode+0xa2/0x170 [<c10c9d4f>] generic_drop_inode+0x4f/0x70 [<c10c8b07>] iput+0x47/0x50 [<c10c0965>] do_unlinkat+0xd5/0x160 [<c10505c6>] ? up_read+0x16/0x30 [<c1022ab7>] ? do_page_fault+0x187/0x330 [<c1002fd8>] ? restore_all_notrace+0x0/0x18 [<c1022930>] ? do_page_fault+0x0/0x330 [<c105cbe4>] ? trace_hardirqs_on_caller+0x124/0x170 [<c10c0a00>] sys_unlink+0x10/0x20 [<c1002ec4>] sysenter_do_call+0x12/0x32 ---[ end trace 2e35d71a6cc69d0c ]--- Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Tested-by: Christian Kujau <lists@nerdbynature.de> Cc: Alexander Beregalov <a.beregalov@gmail.com> Cc: Chris Mason <chris.mason@oracle.com> Cc: Ingo Molnar <mingo@elte.hu>
2010-01-02reiserfs: Relax lock before open xattr dir in reiserfs_xattr_set_handle()Frederic Weisbecker
We call xattr_lookup() from reiserfs_xattr_get(). We then hold the reiserfs lock when we grab the i_mutex. But later, we may relax the reiserfs lock, creating dependency inversion between both locks. The lookups and creation jobs ar already protected by the inode mutex, so we can safely relax the reiserfs lock, dropping the unwanted reiserfs lock -> i_mutex dependency, as shown in the following lockdep report: ======================================================= [ INFO: possible circular locking dependency detected ] 2.6.32-atom #173 ------------------------------------------------------- cp/3204 is trying to acquire lock: (&REISERFS_SB(s)->lock){+.+.+.}, at: [<c11432b9>] reiserfs_write_lock_once+0x29/0x50 but task is already holding lock: (&sb->s_type->i_mutex_key#4/3){+.+.+.}, at: [<c1141e18>] open_xa_dir+0xd8/0x1b0 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&sb->s_type->i_mutex_key#4/3){+.+.+.}: [<c105ea7f>] __lock_acquire+0x11ff/0x19e0 [<c105f2c8>] lock_acquire+0x68/0x90 [<c1401a2b>] mutex_lock_nested+0x5b/0x340 [<c1141d83>] open_xa_dir+0x43/0x1b0 [<c1142722>] reiserfs_for_each_xattr+0x62/0x260 [<c114299a>] reiserfs_delete_xattrs+0x1a/0x60 [<c111ea1f>] reiserfs_delete_inode+0x9f/0x150 [<c10c9c32>] generic_delete_inode+0xa2/0x170 [<c10c9d4f>] generic_drop_inode+0x4f/0x70 [<c10c8b07>] iput+0x47/0x50 [<c10c0965>] do_unlinkat+0xd5/0x160 [<c10c0a00>] sys_unlink+0x10/0x20 [<c1002ec4>] sysenter_do_call+0x12/0x32 -> #0 (&REISERFS_SB(s)->lock){+.+.+.}: [<c105f176>] __lock_acquire+0x18f6/0x19e0 [<c105f2c8>] lock_acquire+0x68/0x90 [<c1401a2b>] mutex_lock_nested+0x5b/0x340 [<c11432b9>] reiserfs_write_lock_once+0x29/0x50 [<c1117012>] reiserfs_lookup+0x62/0x140 [<c10bd85f>] __lookup_hash+0xef/0x110 [<c10bf21d>] lookup_one_len+0x8d/0xc0 [<c1141e2a>] open_xa_dir+0xea/0x1b0 [<c1141fe5>] xattr_lookup+0x15/0x160 [<c1142476>] reiserfs_xattr_get+0x56/0x2a0 [<c1144042>] reiserfs_get_acl+0xa2/0x360 [<c114461a>] reiserfs_cache_default_acl+0x3a/0x160 [<c111789c>] reiserfs_mkdir+0x6c/0x2c0 [<c10bea96>] vfs_mkdir+0xd6/0x180 [<c10c0c10>] sys_mkdirat+0xc0/0xd0 [<c10c0c40>] sys_mkdir+0x20/0x30 [<c1002ec4>] sysenter_do_call+0x12/0x32 other info that might help us debug this: 2 locks held by cp/3204: #0: (&sb->s_type->i_mutex_key#4/1){+.+.+.}, at: [<c10bd8d6>] lookup_create+0x26/0xa0 #1: (&sb->s_type->i_mutex_key#4/3){+.+.+.}, at: [<c1141e18>] open_xa_dir+0xd8/0x1b0 stack backtrace: Pid: 3204, comm: cp Not tainted 2.6.32-atom #173 Call Trace: [<c13ff993>] ? printk+0x18/0x1a [<c105d33a>] print_circular_bug+0xca/0xd0 [<c105f176>] __lock_acquire+0x18f6/0x19e0 [<c105d3aa>] ? check_usage+0x6a/0x460 [<c105f2c8>] lock_acquire+0x68/0x90 [<c11432b9>] ? reiserfs_write_lock_once+0x29/0x50 [<c11432b9>] ? reiserfs_write_lock_once+0x29/0x50 [<c1401a2b>] mutex_lock_nested+0x5b/0x340 [<c11432b9>] ? reiserfs_write_lock_once+0x29/0x50 [<c11432b9>] reiserfs_write_lock_once+0x29/0x50 [<c1117012>] reiserfs_lookup+0x62/0x140 [<c105ccca>] ? debug_check_no_locks_freed+0x8a/0x140 [<c105cbe4>] ? trace_hardirqs_on_caller+0x124/0x170 [<c10bd85f>] __lookup_hash+0xef/0x110 [<c10bf21d>] lookup_one_len+0x8d/0xc0 [<c1141e2a>] open_xa_dir+0xea/0x1b0 [<c1141fe5>] xattr_lookup+0x15/0x160 [<c1142476>] reiserfs_xattr_get+0x56/0x2a0 [<c1144042>] reiserfs_get_acl+0xa2/0x360 [<c10ca2e7>] ? new_inode+0x27/0xa0 [<c114461a>] reiserfs_cache_default_acl+0x3a/0x160 [<c1402eb7>] ? _spin_unlock+0x27/0x40 [<c111789c>] reiserfs_mkdir+0x6c/0x2c0 [<c10c7cb8>] ? __d_lookup+0x108/0x190 [<c105c932>] ? mark_held_locks+0x62/0x80 [<c1401c8d>] ? mutex_lock_nested+0x2bd/0x340 [<c10bd17a>] ? generic_permission+0x1a/0xa0 [<c11788fe>] ? security_inode_permission+0x1e/0x20 [<c10bea96>] vfs_mkdir+0xd6/0x180 [<c10c0c10>] sys_mkdirat+0xc0/0xd0 [<c10505c6>] ? up_read+0x16/0x30 [<c1002fd8>] ? restore_all_notrace+0x0/0x18 [<c10c0c40>] sys_mkdir+0x20/0x30 [<c1002ec4>] sysenter_do_call+0x12/0x32 Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Tested-by: Christian Kujau <lists@nerdbynature.de> Cc: Alexander Beregalov <a.beregalov@gmail.com> Cc: Chris Mason <chris.mason@oracle.com> Cc: Ingo Molnar <mingo@elte.hu>
2010-01-02reiserfs: Relax reiserfs lock while freeing the journalFrederic Weisbecker
Keeping the reiserfs lock while freeing the journal on umount path triggers a lock inversion between bdev->bd_mutex and the reiserfs lock. We don't need the reiserfs lock at this stage. The filesystem is not usable anymore, and there are no more pending commits, everything got flushed (even this operation was done in parallel and didn't required the reiserfs lock from the current process). This fixes the following lockdep report: ======================================================= [ INFO: possible circular locking dependency detected ] 2.6.32-atom #172 ------------------------------------------------------- umount/3904 is trying to acquire lock: (&bdev->bd_mutex){+.+.+.}, at: [<c10de2c2>] __blkdev_put+0x22/0x160 but task is already holding lock: (&REISERFS_SB(s)->lock){+.+.+.}, at: [<c1143279>] reiserfs_write_lock+0x29/0x40 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&REISERFS_SB(s)->lock){+.+.+.}: [<c105ea7f>] __lock_acquire+0x11ff/0x19e0 [<c105f2c8>] lock_acquire+0x68/0x90 [<c140199b>] mutex_lock_nested+0x5b/0x340 [<c1143229>] reiserfs_write_lock_once+0x29/0x50 [<c111c485>] reiserfs_get_block+0x85/0x1620 [<c10e1040>] do_mpage_readpage+0x1f0/0x6d0 [<c10e1640>] mpage_readpages+0xc0/0x100 [<c1119b89>] reiserfs_readpages+0x19/0x20 [<c108f1ec>] __do_page_cache_readahead+0x1bc/0x260 [<c108f2b8>] ra_submit+0x28/0x40 [<c1087e3e>] filemap_fault+0x40e/0x420 [<c109b5fd>] __do_fault+0x3d/0x430 [<c109d47e>] handle_mm_fault+0x12e/0x790 [<c1022a65>] do_page_fault+0x135/0x330 [<c1403663>] error_code+0x6b/0x70 [<c10ef9ca>] load_elf_binary+0x82a/0x1a10 [<c10ba130>] search_binary_handler+0x90/0x1d0 [<c10bb70f>] do_execve+0x1df/0x250 [<c1001746>] sys_execve+0x46/0x70 [<c1002fa5>] syscall_call+0x7/0xb -> #2 (&mm->mmap_sem){++++++}: [<c105ea7f>] __lock_acquire+0x11ff/0x19e0 [<c105f2c8>] lock_acquire+0x68/0x90 [<c109b1ab>] might_fault+0x8b/0xb0 [<c11b8f52>] copy_to_user+0x32/0x70 [<c10c3b94>] filldir64+0xa4/0xf0 [<c1109116>] sysfs_readdir+0x116/0x210 [<c10c3e1d>] vfs_readdir+0x8d/0xb0 [<c10c3ea9>] sys_getdents64+0x69/0xb0 [<c1002ec4>] sysenter_do_call+0x12/0x32 -> #1 (sysfs_mutex){+.+.+.}: [<c105ea7f>] __lock_acquire+0x11ff/0x19e0 [<c105f2c8>] lock_acquire+0x68/0x90 [<c140199b>] mutex_lock_nested+0x5b/0x340 [<c110951c>] sysfs_addrm_start+0x2c/0xb0 [<c1109aa0>] create_dir+0x40/0x90 [<c1109b1b>] sysfs_create_dir+0x2b/0x50 [<c11b2352>] kobject_add_internal+0xc2/0x1b0 [<c11b2531>] kobject_add_varg+0x31/0x50 [<c11b25ac>] kobject_add+0x2c/0x60 [<c1258294>] device_add+0x94/0x560 [<c11036ea>] add_partition+0x18a/0x2a0 [<c110418a>] rescan_partitions+0x33a/0x450 [<c10de5bf>] __blkdev_get+0x12f/0x2d0 [<c10de76a>] blkdev_get+0xa/0x10 [<c11034b8>] register_disk+0x108/0x130 [<c11a87a9>] add_disk+0xd9/0x130 [<c12998e5>] sd_probe_async+0x105/0x1d0 [<c10528af>] async_thread+0xcf/0x230 [<c104bfd4>] kthread+0x74/0x80 [<c1003aab>] kernel_thread_helper+0x7/0x3c -> #0 (&bdev->bd_mutex){+.+.+.}: [<c105f176>] __lock_acquire+0x18f6/0x19e0 [<c105f2c8>] lock_acquire+0x68/0x90 [<c140199b>] mutex_lock_nested+0x5b/0x340 [<c10de2c2>] __blkdev_put+0x22/0x160 [<c10de40a>] blkdev_put+0xa/0x10 [<c113ce22>] free_journal_ram+0xd2/0x130 [<c113ea18>] do_journal_release+0x98/0x190 [<c113eb2a>] journal_release+0xa/0x10 [<c1128eb6>] reiserfs_put_super+0x36/0x130 [<c10b776f>] generic_shutdown_super+0x4f/0xe0 [<c10b7825>] kill_block_super+0x25/0x40 [<c11255df>] reiserfs_kill_sb+0x7f/0x90 [<c10b7f4a>] deactivate_super+0x7a/0x90 [<c10cccd8>] mntput_no_expire+0x98/0xd0 [<c10ccfcc>] sys_umount+0x4c/0x310 [<c10cd2a9>] sys_oldumount+0x19/0x20 [<c1002ec4>] sysenter_do_call+0x12/0x32 other info that might help us debug this: 2 locks held by umount/3904: #0: (&type->s_umount_key#30){+++++.}, at: [<c10b7f45>] deactivate_super+0x75/0x90 #1: (&REISERFS_SB(s)->lock){+.+.+.}, at: [<c1143279>] reiserfs_write_lock+0x29/0x40 stack backtrace: Pid: 3904, comm: umount Not tainted 2.6.32-atom #172 Call Trace: [<c13ff903>] ? printk+0x18/0x1a [<c105d33a>] print_circular_bug+0xca/0xd0 [<c105f176>] __lock_acquire+0x18f6/0x19e0 [<c108b66f>] ? free_pcppages_bulk+0x1f/0x250 [<c105f2c8>] lock_acquire+0x68/0x90 [<c10de2c2>] ? __blkdev_put+0x22/0x160 [<c10de2c2>] ? __blkdev_put+0x22/0x160 [<c140199b>] mutex_lock_nested+0x5b/0x340 [<c10de2c2>] ? __blkdev_put+0x22/0x160 [<c105c932>] ? mark_held_locks+0x62/0x80 [<c10afe12>] ? kfree+0x92/0xd0 [<c10de2c2>] __blkdev_put+0x22/0x160 [<c105cc3b>] ? trace_hardirqs_on+0xb/0x10 [<c10de40a>] blkdev_put+0xa/0x10 [<c113ce22>] free_journal_ram+0xd2/0x130 [<c113ea18>] do_journal_release+0x98/0x190 [<c113eb2a>] journal_release+0xa/0x10 [<c1128eb6>] reiserfs_put_super+0x36/0x130 [<c1050596>] ? up_write+0x16/0x30 [<c10b776f>] generic_shutdown_super+0x4f/0xe0 [<c10b7825>] kill_block_super+0x25/0x40 [<c10f41e0>] ? vfs_quota_off+0x0/0x20 [<c11255df>] reiserfs_kill_sb+0x7f/0x90 [<c10b7f4a>] deactivate_super+0x7a/0x90 [<c10cccd8>] mntput_no_expire+0x98/0xd0 [<c10ccfcc>] sys_umount+0x4c/0x310 [<c10cd2a9>] sys_oldumount+0x19/0x20 [<c1002ec4>] sysenter_do_call+0x12/0x32 Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Alexander Beregalov <a.beregalov@gmail.com> Cc: Chris Mason <chris.mason@oracle.com> Cc: Ingo Molnar <mingo@elte.hu>
2010-01-02reiserfs: Fix reiserfs lock <-> i_mutex dependency inversion on xattrFrederic Weisbecker
While deleting the xattrs of an inode, we hold the reiserfs lock and grab the inode->i_mutex of the targeted inode and the root private xattr directory. Later on, we may relax the reiserfs lock for various reasons, this creates inverted dependencies. We can remove the reiserfs lock -> i_mutex dependency by relaxing the former before calling open_xa_dir(). This is fine because the lookup and creation of xattr private directories done in open_xa_dir() are covered by the targeted inode mutexes. And deeper operations in the tree are still done under the write lock. This fixes the following lockdep report: ======================================================= [ INFO: possible circular locking dependency detected ] 2.6.32-atom #173 ------------------------------------------------------- cp/3204 is trying to acquire lock: (&REISERFS_SB(s)->lock){+.+.+.}, at: [<c11432b9>] reiserfs_write_lock_once+0x29/0x50 but task is already holding lock: (&sb->s_type->i_mutex_key#4/3){+.+.+.}, at: [<c1141e18>] open_xa_dir+0xd8/0x1b0 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&sb->s_type->i_mutex_key#4/3){+.+.+.}: [<c105ea7f>] __lock_acquire+0x11ff/0x19e0 [<c105f2c8>] lock_acquire+0x68/0x90 [<c1401a2b>] mutex_lock_nested+0x5b/0x340 [<c1141d83>] open_xa_dir+0x43/0x1b0 [<c1142722>] reiserfs_for_each_xattr+0x62/0x260 [<c114299a>] reiserfs_delete_xattrs+0x1a/0x60 [<c111ea1f>] reiserfs_delete_inode+0x9f/0x150 [<c10c9c32>] generic_delete_inode+0xa2/0x170 [<c10c9d4f>] generic_drop_inode+0x4f/0x70 [<c10c8b07>] iput+0x47/0x50 [<c10c0965>] do_unlinkat+0xd5/0x160 [<c10c0a00>] sys_unlink+0x10/0x20 [<c1002ec4>] sysenter_do_call+0x12/0x32 -> #0 (&REISERFS_SB(s)->lock){+.+.+.}: [<c105f176>] __lock_acquire+0x18f6/0x19e0 [<c105f2c8>] lock_acquire+0x68/0x90 [<c1401a2b>] mutex_lock_nested+0x5b/0x340 [<c11432b9>] reiserfs_write_lock_once+0x29/0x50 [<c1117012>] reiserfs_lookup+0x62/0x140 [<c10bd85f>] __lookup_hash+0xef/0x110 [<c10bf21d>] lookup_one_len+0x8d/0xc0 [<c1141e2a>] open_xa_dir+0xea/0x1b0 [<c1141fe5>] xattr_lookup+0x15/0x160 [<c1142476>] reiserfs_xattr_get+0x56/0x2a0 [<c1144042>] reiserfs_get_acl+0xa2/0x360 [<c114461a>] reiserfs_cache_default_acl+0x3a/0x160 [<c111789c>] reiserfs_mkdir+0x6c/0x2c0 [<c10bea96>] vfs_mkdir+0xd6/0x180 [<c10c0c10>] sys_mkdirat+0xc0/0xd0 [<c10c0c40>] sys_mkdir+0x20/0x30 [<c1002ec4>] sysenter_do_call+0x12/0x32 other info that might help us debug this: 2 locks held by cp/3204: #0: (&sb->s_type->i_mutex_key#4/1){+.+.+.}, at: [<c10bd8d6>] lookup_create+0x26/0xa0 #1: (&sb->s_type->i_mutex_key#4/3){+.+.+.}, at: [<c1141e18>] open_xa_dir+0xd8/0x1b0 stack backtrace: Pid: 3204, comm: cp Not tainted 2.6.32-atom #173 Call Trace: [<c13ff993>] ? printk+0x18/0x1a [<c105d33a>] print_circular_bug+0xca/0xd0 [<c105f176>] __lock_acquire+0x18f6/0x19e0 [<c105d3aa>] ? check_usage+0x6a/0x460 [<c105f2c8>] lock_acquire+0x68/0x90 [<c11432b9>] ? reiserfs_write_lock_once+0x29/0x50 [<c11432b9>] ? reiserfs_write_lock_once+0x29/0x50 [<c1401a2b>] mutex_lock_nested+0x5b/0x340 [<c11432b9>] ? reiserfs_write_lock_once+0x29/0x50 [<c11432b9>] reiserfs_write_lock_once+0x29/0x50 [<c1117012>] reiserfs_lookup+0x62/0x140 [<c105ccca>] ? debug_check_no_locks_freed+0x8a/0x140 [<c105cbe4>] ? trace_hardirqs_on_caller+0x124/0x170 [<c10bd85f>] __lookup_hash+0xef/0x110 [<c10bf21d>] lookup_one_len+0x8d/0xc0 [<c1141e2a>] open_xa_dir+0xea/0x1b0 [<c1141fe5>] xattr_lookup+0x15/0x160 [<c1142476>] reiserfs_xattr_get+0x56/0x2a0 [<c1144042>] reiserfs_get_acl+0xa2/0x360 [<c10ca2e7>] ? new_inode+0x27/0xa0 [<c114461a>] reiserfs_cache_default_acl+0x3a/0x160 [<c1402eb7>] ? _spin_unlock+0x27/0x40 [<c111789c>] reiserfs_mkdir+0x6c/0x2c0 [<c10c7cb8>] ? __d_lookup+0x108/0x190 [<c105c932>] ? mark_held_locks+0x62/0x80 [<c1401c8d>] ? mutex_lock_nested+0x2bd/0x340 [<c10bd17a>] ? generic_permission+0x1a/0xa0 [<c11788fe>] ? security_inode_permission+0x1e/0x20 [<c10bea96>] vfs_mkdir+0xd6/0x180 [<c10c0c10>] sys_mkdirat+0xc0/0xd0 [<c10505c6>] ? up_read+0x16/0x30 [<c1002fd8>] ? restore_all_notrace+0x0/0x18 [<c10c0c40>] sys_mkdir+0x20/0x30 [<c1002ec4>] sysenter_do_call+0x12/0x32 v2: Don't drop reiserfs_mutex_lock_nested_safe() as we'll still need it later Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Tested-by: Christian Kujau <lists@nerdbynature.de> Cc: Alexander Beregalov <a.beregalov@gmail.com> Cc: Chris Mason <chris.mason@oracle.com> Cc: Ingo Molnar <mingo@elte.hu>
2010-01-02reiserfs: Warn on lock relax if taken recursivelyFrederic Weisbecker
When we relax the reiserfs lock to avoid creating unwanted dependencies against others locks while grabbing these, we want to ensure it has not been taken recursively, otherwise the lock won't be really relaxed. Only its depth will be decreased. The unwanted dependency would then actually happen. To prevent from that, add a reiserfs_lock_check_recursive() call in the places that need it. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Alexander Beregalov <a.beregalov@gmail.com> Cc: Chris Mason <chris.mason@oracle.com> Cc: Ingo Molnar <mingo@elte.hu>
2010-01-02reiserfs: Fix reiserfs lock <-> i_xattr_sem dependency inversionFrederic Weisbecker
i_xattr_sem depends on the reiserfs lock. But after we grab i_xattr_sem, we may relax/relock the reiserfs lock while waiting on a freezed filesystem, creating a dependency inversion between the two locks. In order to avoid the i_xattr_sem -> reiserfs lock dependency, let's create a reiserfs_down_read_safe() that acts like reiserfs_mutex_lock_safe(): relax the reiserfs lock while grabbing another lock to avoid undesired dependencies induced by the heivyweight reiserfs lock. This fixes the following warning: [ 990.005931] ======================================================= [ 990.012373] [ INFO: possible circular locking dependency detected ] [ 990.013233] 2.6.33-rc1 #1 [ 990.013233] ------------------------------------------------------- [ 990.013233] dbench/1891 is trying to acquire lock: [ 990.013233] (&REISERFS_SB(s)->lock){+.+.+.}, at: [<ffffffff81159505>] reiserfs_write_lock+0x35/0x50 [ 990.013233] [ 990.013233] but task is already holding lock: [ 990.013233] (&REISERFS_I(inode)->i_xattr_sem){+.+.+.}, at: [<ffffffff8115899a>] reiserfs_xattr_set_handle+0x8a/0x470 [ 990.013233] [ 990.013233] which lock already depends on the new lock. [ 990.013233] [ 990.013233] [ 990.013233] the existing dependency chain (in reverse order) is: [ 990.013233] [ 990.013233] -> #1 (&REISERFS_I(inode)->i_xattr_sem){+.+.+.}: [ 990.013233] [<ffffffff81063afc>] __lock_acquire+0xf9c/0x1560 [ 990.013233] [<ffffffff8106414f>] lock_acquire+0x8f/0xb0 [ 990.013233] [<ffffffff814ac194>] down_write+0x44/0x80 [ 990.013233] [<ffffffff8115899a>] reiserfs_xattr_set_handle+0x8a/0x470 [ 990.013233] [<ffffffff81158e30>] reiserfs_xattr_set+0xb0/0x150 [ 990.013233] [<ffffffff8115a6aa>] user_set+0x8a/0x90 [ 990.013233] [<ffffffff8115901a>] reiserfs_setxattr+0xaa/0xb0 [ 990.013233] [<ffffffff810e2596>] __vfs_setxattr_noperm+0x36/0xa0 [ 990.013233] [<ffffffff810e26bc>] vfs_setxattr+0xbc/0xc0 [ 990.013233] [<ffffffff810e2780>] setxattr+0xc0/0x150 [ 990.013233] [<ffffffff810e289d>] sys_fsetxattr+0x8d/0xa0 [ 990.013233] [<ffffffff81002dab>] system_call_fastpath+0x16/0x1b [ 990.013233] [ 990.013233] -> #0 (&REISERFS_SB(s)->lock){+.+.+.}: [ 990.013233] [<ffffffff81063e30>] __lock_acquire+0x12d0/0x1560 [ 990.013233] [<ffffffff8106414f>] lock_acquire+0x8f/0xb0 [ 990.013233] [<ffffffff814aba77>] __mutex_lock_common+0x47/0x3b0 [ 990.013233] [<ffffffff814abebe>] mutex_lock_nested+0x3e/0x50 [ 990.013233] [<ffffffff81159505>] reiserfs_write_lock+0x35/0x50 [ 990.013233] [<ffffffff811340e5>] reiserfs_prepare_write+0x45/0x180 [ 990.013233] [<ffffffff81158bb6>] reiserfs_xattr_set_handle+0x2a6/0x470 [ 990.013233] [<ffffffff81158e30>] reiserfs_xattr_set+0xb0/0x150 [ 990.013233] [<ffffffff8115a6aa>] user_set+0x8a/0x90 [ 990.013233] [<ffffffff8115901a>] reiserfs_setxattr+0xaa/0xb0 [ 990.013233] [<ffffffff810e2596>] __vfs_setxattr_noperm+0x36/0xa0 [ 990.013233] [<ffffffff810e26bc>] vfs_setxattr+0xbc/0xc0 [ 990.013233] [<ffffffff810e2780>] setxattr+0xc0/0x150 [ 990.013233] [<ffffffff810e289d>] sys_fsetxattr+0x8d/0xa0 [ 990.013233] [<ffffffff81002dab>] system_call_fastpath+0x16/0x1b [ 990.013233] [ 990.013233] other info that might help us debug this: [ 990.013233] [ 990.013233] 2 locks held by dbench/1891: [ 990.013233] #0: (&sb->s_type->i_mutex_key#12){+.+.+.}, at: [<ffffffff810e2678>] vfs_setxattr+0x78/0xc0 [ 990.013233] #1: (&REISERFS_I(inode)->i_xattr_sem){+.+.+.}, at: [<ffffffff8115899a>] reiserfs_xattr_set_handle+0x8a/0x470 [ 990.013233] [ 990.013233] stack backtrace: [ 990.013233] Pid: 1891, comm: dbench Not tainted 2.6.33-rc1 #1 [ 990.013233] Call Trace: [ 990.013233] [<ffffffff81061639>] print_circular_bug+0xe9/0xf0 [ 990.013233] [<ffffffff81063e30>] __lock_acquire+0x12d0/0x1560 [ 990.013233] [<ffffffff8115899a>] ? reiserfs_xattr_set_handle+0x8a/0x470 [ 990.013233] [<ffffffff8106414f>] lock_acquire+0x8f/0xb0 [ 990.013233] [<ffffffff81159505>] ? reiserfs_write_lock+0x35/0x50 [ 990.013233] [<ffffffff8115899a>] ? reiserfs_xattr_set_handle+0x8a/0x470 [ 990.013233] [<ffffffff814aba77>] __mutex_lock_common+0x47/0x3b0 [ 990.013233] [<ffffffff81159505>] ? reiserfs_write_lock+0x35/0x50 [ 990.013233] [<ffffffff81159505>] ? reiserfs_write_lock+0x35/0x50 [ 990.013233] [<ffffffff81062592>] ? mark_held_locks+0x72/0xa0 [ 990.013233] [<ffffffff814ab81d>] ? __mutex_unlock_slowpath+0xbd/0x140 [ 990.013233] [<ffffffff810628ad>] ? trace_hardirqs_on_caller+0x14d/0x1a0 [ 990.013233] [<ffffffff814abebe>] mutex_lock_nested+0x3e/0x50 [ 990.013233] [<ffffffff81159505>] reiserfs_write_lock+0x35/0x50 [ 990.013233] [<ffffffff811340e5>] reiserfs_prepare_write+0x45/0x180 [ 990.013233] [<ffffffff81158bb6>] reiserfs_xattr_set_handle+0x2a6/0x470 [ 990.013233] [<ffffffff81158e30>] reiserfs_xattr_set+0xb0/0x150 [ 990.013233] [<ffffffff814abcb4>] ? __mutex_lock_common+0x284/0x3b0 [ 990.013233] [<ffffffff8115a6aa>] user_set+0x8a/0x90 [ 990.013233] [<ffffffff8115901a>] reiserfs_setxattr+0xaa/0xb0 [ 990.013233] [<ffffffff810e2596>] __vfs_setxattr_noperm+0x36/0xa0 [ 990.013233] [<ffffffff810e26bc>] vfs_setxattr+0xbc/0xc0 [ 990.013233] [<ffffffff810e2780>] setxattr+0xc0/0x150 [ 990.013233] [<ffffffff81056018>] ? sched_clock_cpu+0xb8/0x100 [ 990.013233] [<ffffffff8105eded>] ? trace_hardirqs_off+0xd/0x10 [ 990.013233] [<ffffffff810560a3>] ? cpu_clock+0x43/0x50 [ 990.013233] [<ffffffff810c6820>] ? fget+0xb0/0x110 [ 990.013233] [<ffffffff810c6770>] ? fget+0x0/0x110 [ 990.013233] [<ffffffff81002ddc>] ? sysret_check+0x27/0x62 [ 990.013233] [<ffffffff810e289d>] sys_fsetxattr+0x8d/0xa0 [ 990.013233] [<ffffffff81002dab>] system_call_fastpath+0x16/0x1b Reported-and-tested-by: Christian Kujau <lists@nerdbynature.de> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Alexander Beregalov <a.beregalov@gmail.com> Cc: Chris Mason <chris.mason@oracle.com> Cc: Ingo Molnar <mingo@elte.hu>
2010-01-01ext4: Calculate metadata requirements more accuratelyTheodore Ts'o
In the past, ext4_calc_metadata_amount(), and its sub-functions ext4_ext_calc_metadata_amount() and ext4_indirect_calc_metadata_amount() badly over-estimated the number of metadata blocks that might be required for delayed allocation blocks. This didn't matter as much when functions which managed the reserved metadata blocks were more aggressive about dropping reserved metadata blocks as delayed allocation blocks were written, but unfortunately they were too aggressive. This was fixed in commit 0637c6f, but as a result the over-estimation by ext4_calc_metadata_amount() would lead to reserving 2-3 times the number of pending delayed allocation blocks as potentially required metadata blocks. So if there are 1 megabytes of blocks which have been not yet been allocation, up to 3 megabytes of space would get reserved out of the user's quota and from the file system free space pool until all of the inode's data blocks have been allocated. This commit addresses this problem by much more accurately estimating the number of metadata blocks that will be required. It will still somewhat over-estimate the number of blocks needed, since it must make a worst case estimate not knowing which physical blocks will be needed, but it is much more accurate than before. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-01-01ext4: Fix accounting of reserved metadata blocksTheodore Ts'o
Commit 0637c6f had a typo which caused the reserved metadata blocks to not be released correctly. Fix this. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-12-31Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: [CIFS] Enable mmap on forcedirectio mounts cifs: NULL out tcon, pSesInfo, and srvTcp pointers when chasing DFS referrals
2009-12-30ocfs2: Handle O_DIRECT when writing to a refcounted cluster.Tao Ma
In case of writing to a refcounted cluster with O_DIRECT, we need to fall back to buffer write. And when it is finished, we need to flush the page and the journal as we did for other O_DIRECT writes. This patch fix oss bug 1191. http://oss.oracle.com/bugzilla/show_bug.cgi?id=1191 Signed-off-by: Tao Ma <tao.ma@oracle.com> Tested-by: Tristan Ye <tristan.ye@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-12-30Merge branch 'for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: Patch up how we claim metadata blocks for quota purposes ext4: Ensure zeroout blocks have no dirty metadata ext4: return correct wbc.nr_to_write in ext4_da_writepages ext4: Update documentation to correct the inode_readahead_blks option name jbd2: don't use __GFP_NOFAIL in journal_init_common() ext4: flush delalloc blocks when space is low fs-writeback: Add helper function to start writeback if idle ext4: Eliminate potential double free on error path ext4: fix unsigned long long printk warning in super.c ext4, jbd2: Add barriers for file systems with exernal journals ext4: replace BUG() with return -EIO in ext4_ext_get_blocks ext4: add module aliases for ext2 and ext3 ext4: Don't ask about supporting ext2/3 in ext4 if ext4 is not configured ext4: remove unused #include <linux/version.h>
2009-12-30generic_permission: MAY_OPEN is not write accessSerge E. Hallyn
generic_permission was refusing CAP_DAC_READ_SEARCH-enabled processes from opening DAC-protected files read-only, because do_filp_open adds MAY_OPEN to the open mask. Ignore MAY_OPEN. After this patch, CAP_DAC_READ_SEARCH is again sufficient to open(fname, O_RDONLY) on a file to which DAC otherwise refuses us read permission. Reported-by: Mike Kazantsev <mk.fraggod@gmail.com> Signed-off-by: Serge E. Hallyn <serue@us.ibm.com> Tested-by: Mike Kazantsev <mk.fraggod@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-30ext4: Patch up how we claim metadata blocks for quota purposesTheodore Ts'o
As reported in Kernel Bugzilla #14936, commit d21cd8f triggered a BUG in the function ext4_da_update_reserve_space() found in fs/ext4/inode.c. The root cause of this BUG() was caused by the fact that ext4_calc_metadata_amount() can severely over-estimate how many metadata blocks will be needed, especially when using direct block-mapped files. In addition, it can also badly *under* estimate how much space is needed, since ext4_calc_metadata_amount() assumes that the blocks are contiguous, and this is not always true. If the application is writing blocks to a sparse file, the number of metadata blocks necessary can be severly underestimated by the functions ext4_da_reserve_space(), ext4_da_update_reserve_space() and ext4_da_release_space(). This was the cause of the dq_claim_space reports found on kerneloops.org. Unfortunately, doing this right means that we need to massively over-estimate the amount of free space needed. So in some cases we may need to force the inode to be written to disk asynchronously in to avoid spurious quota failures. http://bugzilla.kernel.org/show_bug.cgi?id=14936 Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-12-29ext4: Ensure zeroout blocks have no dirty metadataAneesh Kumar K.V
This fixes a bug (found by Curt Wohlgemuth) in which new blocks returned from an extent created with ext4_ext_zeroout() can have dirty metadata still associated with them. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Curt Wohlgemuth <curtw@google.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-12-29reiserfs: Fix remaining in-reclaim-fs <-> reclaim-fs-on locking inversionFrederic Weisbecker
Commit 500f5a0bf5f0624dae34307010e240ec090e4cde (reiserfs: Fix possible recursive lock) fixed a vmalloc under reiserfs lock that triggered a lockdep warning because of a IN-FS-RECLAIM <-> RECLAIM-FS-ON locking dependency inversion. But this patch has ommitted another vmalloc call in the same path that allocates the journal. Relax the lock for this one too. Reported-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Chris Mason <chris.mason@oracle.com> Cc: Ingo Molnar <mingo@elte.hu>
2009-12-25ext4: return correct wbc.nr_to_write in ext4_da_writepagesRichard Kennedy
When ext4_da_writepages increases the nr_to_write in writeback_control then it must always re-base the return value. Originally there was a (misguided) attempt prevent wbc.nr_to_write from going negative. In fact, it's necessary to allow nr_to_write to be negative so that wb_writeback() can correctly calculate how many pages were actually written. Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-12-25nilfs2: Storage class should be before const qualifierTobias Klauser
The C99 specification states in section 6.11.5: The placement of a storage-class specifier other than at the beginning of the declaration specifiers in a declaration is an obsolescent feature. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2009-12-25nilfs2: trivial coding style fixJiro SEKIBA
This is a trivial style fix patch to mend errors/warnings reported by "checkpatch.pl --file". Signed-off-by: Jiro SEKIBA <jir@unicus.jp> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2009-12-24Merge branch 'upstream-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2 * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2: ocfs2/trivial: Use le16_to_cpu for a disk value in xattr.c ocfs2/trivial: Use proper mask for 2 places in hearbeat.c Ocfs2: Let ocfs2 support fiemap for symlink and fast symlink. Ocfs2: Should ocfs2 support fiemap for S_IFDIR inode? ocfs2: Use FIEMAP_EXTENT_SHARED fiemap: Add new extent flag FIEMAP_EXTENT_SHARED ocfs2: replace u8 by __u8 in ocfs2_fs.h ocfs2: explicit declare uninitialized var in user_cluster_connect() ocfs2-devel: remove redundant OCFS2_MOUNT_POSIX_ACL check in ocfs2_get_acl_nolock() ocfs2: return -EAGAIN instead of EAGAIN in dlm ocfs2/cluster: Make fence method configurable - v2 ocfs2: Set MS_POSIXACL on remount ocfs2: Make acl use the default ocfs2: Always include ACL support
2009-12-23ocfs2/trivial: Use le16_to_cpu for a disk value in xattr.cTao Ma
In ocfs2_value_metas_in_xattr_header, we should Use le16_to_cpu for ocfs2_extent_list.l_next_free_rec. Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-12-23ocfs2/trivial: Use proper mask for 2 places in hearbeat.cTao Ma
I just noticed today that there are 2 places of "mlog(0,...)" in fs/ocfs2/cluster/heartbeat.c, but actually have no default mask prefix in that file. So change them to mlog(ML_HEARTBEAT,...). Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-12-23Ocfs2: Let ocfs2 support fiemap for symlink and fast symlink.Tristan Ye
For fast symlink, it can be treated the same as inlined files since the data extent we want to return of both case all were stored in metadata block. For symlink, it can be simply treated the same as we did for regular files. Signed-off-by: Tristan Ye <tristan.ye@oracle.com> Acked-by: Sunil Mushran <sunil.mushran@oracle.com> Signed-off-by: Joel Becker <joel.becker@oracle.com>
2009-12-23Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: devtmpfs: unlock mutex in case of string allocation error Driver core: export platform_device_register_data as a GPL symbol driver core: Prevent reference to freed memory on error path Driver-core: Fix bogus 0 error return in device_add() Driver core: driver_attribute parameters can often be const* Driver core: bin_attribute parameters can often be const* Driver core: device_attribute parameters can often be const* Doc/stable rules: add new cherry-pick logic vfs: get_sb_single() - do not pass options twice devtmpfs: Convert dirlock to a mutex
2009-12-23Merge branch 'upstream-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2 * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2: ocfs2: Set i_nlink properly during reflink. ocfs2: Add reflinked file's inode to inode hash eariler. ocfs2: refcounttree.c cleanup. ocfs2: Find proper end cpos for a leaf refcount block.
2009-12-23Driver core: bin_attribute parameters can often be const*Phil Carmody
Many struct bin_attribute descriptors are purely read-only structures, and there's no need to change them. Therefore make the promise not to, which will let those descriptors be put in a ro section. Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-23vfs: get_sb_single() - do not pass options twiceKay Sievers
Filesystem code usually destroys the option buffer while parsing it. This leads to errors when the same buffer is passed twice. In case we fill a new superblock do not call remount. This is needed to quite a warning that the debugfs code causes every boot. Cc: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2009-12-23jbd2: don't use __GFP_NOFAIL in journal_init_common()Andrew Morton
It triggers the warning in get_page_from_freelist(), and it isn't appropriate to use __GFP_NOFAIL here anyway. Addresses http://bugzilla.kernel.org/show_bug.cgi?id=14843 Reported-by: Christian Casteyde <casteyde.christian@free.fr> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-12-23ext4: flush delalloc blocks when space is lowEric Sandeen
Creating many small files in rapid succession on a small filesystem can lead to spurious ENOSPC; on a 104MB filesystem: for i in `seq 1 22500`; do echo -n > $SCRATCH_MNT/$i echo XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX > $SCRATCH_MNT/$i done leads to ENOSPC even though after a sync, 40% of the fs is free again. This is because we reserve worst-case metadata for delalloc writes, and when data is allocated that worst-case reservation is not usually needed. When freespace is low, kicking off an async writeback will start converting that worst-case space usage into something more realistic, almost always freeing up space to continue. This resolves the testcase for me, and survives all 4 generic ENOSPC tests in xfstests. We'll still need a hard synchronous sync to squeeze out the last bit, but this fixes things up to a large degree. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-12-23fs-writeback: Add helper function to start writeback if idleEric Sandeen
ext4, at least, would like to start pushing on writeback if it starts to get close to ENOSPC when reserving worst-case blocks for delalloc writes. Writing out delalloc data will convert those worst-case predictions into usually smaller actual usage, freeing up space before we hit ENOSPC based on this speculation. Thanks to Jens for the suggestion for the helper function, & the naming help. I've made the helper return status on whether writeback was started even though I don't plan to use it in the ext4 patch; it seems like it would be potentially useful to test this in some cases. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Acked-by: Jan Kara <jack@suse.cz>
2009-12-23ext4: Eliminate potential double free on error pathJulia Lawall
b_entry_name and buffer are initially NULL, are initialized within a loop to the result of calling kmalloc, and are freed at the bottom of this loop. The loop contains gotos to cleanup, which also frees b_entry_name and buffer. Some of these gotos are before the reinitializations of b_entry_name and buffer. To maintain the invariant that b_entry_name and buffer are NULL at the top of the loop, and thus acceptable arguments to kfree, these variables are now set to NULL after the kfrees. This seems to be the simplest solution. A more complicated solution would be to introduce more labels in the error handling code at the end of the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r@ identifier E; expression E1; iterator I; statement S; @@ *kfree(E); ... when != E = E1 when != I(E,...) S when != &E *kfree(E); // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-12-23ext4: fix unsigned long long printk warning in super.cAndrew Morton
sparc64 allmodconfig: fs/ext4/super.c: In function `lifetime_write_kbytes_show': fs/ext4/super.c:2174: warning: long long unsigned int format, long unsigned int arg (arg 4) fs/ext4/super.c:2174: warning: long long unsigned int format, long unsigned int arg (arg 4) Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-12-23quota: Improve checking of quota file headerJan Kara
When we are asked for vfsv0 quota format and the file is in vfsv1 format (or vice versa), refuse to use the quota file. Also return with error when we don't like the header of quota file. Signed-off-by: Jan Kara <jack@suse.cz>
2009-12-23jbd: jbd-debug and jbd2-debug should be writableYin Kangkai
jbd-debug and jbd2-debug is currently read-only (S_IRUGO), which is not correct. Make it writable so that we can start debuging. Signed-off-by: Yin Kangkai <kangkai.yin@intel.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jan Kara <jack@suse.cz>
2009-12-23ext4: fix sleep inside spinlock issue with quota and dealloc (#14739)Dmitry Monakhov
Unlock i_block_reservation_lock before vfs_dq_reserve_block(). This patch fixes http://bugzilla.kernel.org/show_bug.cgi?id=14739 CC: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Jan Kara <jack@suse.cz>
2009-12-23ext4: Fix potential quota deadlockDmitry Monakhov
We have to delay vfs_dq_claim_space() until allocation context destruction. Currently we have following call-trace: ext4_mb_new_blocks() /* task is already holding ac->alloc_semp */ ->ext4_mb_mark_diskspace_used ->vfs_dq_claim_space() /* acquire dqptr_sem here. Possible deadlock */ ->ext4_mb_release_context() /* drop ac->alloc_semp here */ Let's move quota claiming to ext4_da_update_reserve_space() ======================================================= [ INFO: possible circular locking dependency detected ] 2.6.32-rc7 #18 ------------------------------------------------------- write-truncate-/3465 is trying to acquire lock: (&s->s_dquot.dqptr_sem){++++..}, at: [<c025e73b>] dquot_claim_space+0x3b/0x1b0 but task is already holding lock: (&meta_group_info[i]->alloc_sem){++++..}, at: [<c02ce962>] ext4_mb_load_buddy+0xb2/0x370 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&meta_group_info[i]->alloc_sem){++++..}: [<c017d04b>] __lock_acquire+0xd7b/0x1260 [<c017d5ea>] lock_acquire+0xba/0xd0 [<c0527191>] down_read+0x51/0x90 [<c02ce962>] ext4_mb_load_buddy+0xb2/0x370 [<c02d0c1c>] ext4_mb_free_blocks+0x46c/0x870 [<c029c9d3>] ext4_free_blocks+0x73/0x130 [<c02c8cfc>] ext4_ext_truncate+0x76c/0x8d0 [<c02a8087>] ext4_truncate+0x187/0x5e0 [<c01e0f7b>] vmtruncate+0x6b/0x70 [<c022ec02>] inode_setattr+0x62/0x190 [<c02a2d7a>] ext4_setattr+0x25a/0x370 [<c022ee81>] notify_change+0x151/0x340 [<c021349d>] do_truncate+0x6d/0xa0 [<c0221034>] may_open+0x1d4/0x200 [<c022412b>] do_filp_open+0x1eb/0x910 [<c021244d>] do_sys_open+0x6d/0x140 [<c021258e>] sys_open+0x2e/0x40 [<c0103100>] sysenter_do_call+0x12/0x32 -> #2 (&ei->i_data_sem){++++..}: [<c017d04b>] __lock_acquire+0xd7b/0x1260 [<c017d5ea>] lock_acquire+0xba/0xd0 [<c0527191>] down_read+0x51/0x90 [<c02a5787>] ext4_get_blocks+0x47/0x450 [<c02a74c1>] ext4_getblk+0x61/0x1d0 [<c02a7a7f>] ext4_bread+0x1f/0xa0 [<c02bcddc>] ext4_quota_write+0x12c/0x310 [<c0262d23>] qtree_write_dquot+0x93/0x120 [<c0261708>] v2_write_dquot+0x28/0x30 [<c025d3fb>] dquot_commit+0xab/0xf0 [<c02be977>] ext4_write_dquot+0x77/0x90 [<c02be9bf>] ext4_mark_dquot_dirty+0x2f/0x50 [<c025e321>] dquot_alloc_inode+0x101/0x180 [<c029fec2>] ext4_new_inode+0x602/0xf00 [<c02ad789>] ext4_create+0x89/0x150 [<c0221ff2>] vfs_create+0xa2/0xc0 [<c02246e7>] do_filp_open+0x7a7/0x910 [<c021244d>] do_sys_open+0x6d/0x140 [<c021258e>] sys_open+0x2e/0x40 [<c0103100>] sysenter_do_call+0x12/0x32 -> #1 (&sb->s_type->i_mutex_key#7/4){+.+...}: [<c017d04b>] __lock_acquire+0xd7b/0x1260 [<c017d5ea>] lock_acquire+0xba/0xd0 [<c0526505>] mutex_lock_nested+0x65/0x2d0 [<c0260c9d>] vfs_load_quota_inode+0x4bd/0x5a0 [<c02610af>] vfs_quota_on_path+0x5f/0x70 [<c02bc812>] ext4_quota_on+0x112/0x190 [<c026345a>] sys_quotactl+0x44a/0x8a0 [<c0103100>] sysenter_do_call+0x12/0x32 -> #0 (&s->s_dquot.dqptr_sem){++++..}: [<c017d361>] __lock_acquire+0x1091/0x1260 [<c017d5ea>] lock_acquire+0xba/0xd0 [<c0527191>] down_read+0x51/0x90 [<c025e73b>] dquot_claim_space+0x3b/0x1b0 [<c02cb95f>] ext4_mb_mark_diskspace_used+0x36f/0x380 [<c02d210a>] ext4_mb_new_blocks+0x34a/0x530 [<c02c83fb>] ext4_ext_get_blocks+0x122b/0x13c0 [<c02a5966>] ext4_get_blocks+0x226/0x450 [<c02a5ff3>] mpage_da_map_blocks+0xc3/0xaa0 [<c02a6ed6>] ext4_da_writepages+0x506/0x790 [<c01de272>] do_writepages+0x22/0x50 [<c01d766d>] __filemap_fdatawrite_range+0x6d/0x80 [<c01d7b9b>] filemap_flush+0x2b/0x30 [<c02a40ac>] ext4_alloc_da_blocks+0x5c/0x60 [<c029e595>] ext4_release_file+0x75/0xb0 [<c0216b59>] __fput+0xf9/0x210 [<c0216c97>] fput+0x27/0x30 [<c02122dc>] filp_close+0x4c/0x80 [<c014510e>] put_files_struct+0x6e/0xd0 [<c01451b7>] exit_files+0x47/0x60 [<c0146a24>] do_exit+0x144/0x710 [<c0147028>] do_group_exit+0x38/0xa0 [<c0159abc>] get_signal_to_deliver+0x2ac/0x410 [<c0102849>] do_notify_resume+0xb9/0x890 [<c01032d2>] work_notifysig+0x13/0x21 other info that might help us debug this: 3 locks held by write-truncate-/3465: #0: (jbd2_handle){+.+...}, at: [<c02e1f8f>] start_this_handle+0x38f/0x5c0 #1: (&ei->i_data_sem){++++..}, at: [<c02a57f6>] ext4_get_blocks+0xb6/0x450 #2: (&meta_group_info[i]->alloc_sem){++++..}, at: [<c02ce962>] ext4_mb_load_buddy+0xb2/0x370 stack backtrace: Pid: 3465, comm: write-truncate- Not tainted 2.6.32-rc7 #18 Call Trace: [<c0524cb3>] ? printk+0x1d/0x22 [<c017ac9a>] print_circular_bug+0xca/0xd0 [<c017d361>] __lock_acquire+0x1091/0x1260 [<c016bca2>] ? sched_clock_local+0xd2/0x170 [<c0178fd0>] ? trace_hardirqs_off_caller+0x20/0xd0 [<c017d5ea>] lock_acquire+0xba/0xd0 [<c025e73b>] ? dquot_claim_space+0x3b/0x1b0 [<c0527191>] down_read+0x51/0x90 [<c025e73b>] ? dquot_claim_space+0x3b/0x1b0 [<c025e73b>] dquot_claim_space+0x3b/0x1b0 [<c02cb95f>] ext4_mb_mark_diskspace_used+0x36f/0x380 [<c02d210a>] ext4_mb_new_blocks+0x34a/0x530 [<c02c601d>] ? ext4_ext_find_extent+0x25d/0x280 [<c02c83fb>] ext4_ext_get_blocks+0x122b/0x13c0 [<c016bca2>] ? sched_clock_local+0xd2/0x170 [<c016be60>] ? sched_clock_cpu+0x120/0x160 [<c016beef>] ? cpu_clock+0x4f/0x60 [<c0178fd0>] ? trace_hardirqs_off_caller+0x20/0xd0 [<c052712c>] ? down_write+0x8c/0xa0 [<c02a5966>] ext4_get_blocks+0x226/0x450 [<c016be60>] ? sched_clock_cpu+0x120/0x160 [<c016beef>] ? cpu_clock+0x4f/0x60 [<c017908b>] ? trace_hardirqs_off+0xb/0x10 [<c02a5ff3>] mpage_da_map_blocks+0xc3/0xaa0 [<c01d69cc>] ? find_get_pages_tag+0x16c/0x180 [<c01d6860>] ? find_get_pages_tag+0x0/0x180 [<c02a73bd>] ? __mpage_da_writepage+0x16d/0x1a0 [<c01dfc4e>] ? pagevec_lookup_tag+0x2e/0x40 [<c01ddf1b>] ? write_cache_pages+0xdb/0x3d0 [<c02a7250>] ? __mpage_da_writepage+0x0/0x1a0 [<c02a6ed6>] ext4_da_writepages+0x506/0x790 [<c016beef>] ? cpu_clock+0x4f/0x60 [<c016bca2>] ? sched_clock_local+0xd2/0x170 [<c016be60>] ? sched_clock_cpu+0x120/0x160 [<c016be60>] ? sched_clock_cpu+0x120/0x160 [<c02a69d0>] ? ext4_da_writepages+0x0/0x790 [<c01de272>] do_writepages+0x22/0x50 [<c01d766d>] __filemap_fdatawrite_range+0x6d/0x80 [<c01d7b9b>] filemap_flush+0x2b/0x30 [<c02a40ac>] ext4_alloc_da_blocks+0x5c/0x60 [<c029e595>] ext4_release_file+0x75/0xb0 [<c0216b59>] __fput+0xf9/0x210 [<c0216c97>] fput+0x27/0x30 [<c02122dc>] filp_close+0x4c/0x80 [<c014510e>] put_files_struct+0x6e/0xd0 [<c01451b7>] exit_files+0x47/0x60 [<c0146a24>] do_exit+0x144/0x710 [<c017b163>] ? lock_release_holdtime+0x33/0x210 [<c0528137>] ? _spin_unlock_irq+0x27/0x30 [<c0147028>] do_group_exit+0x38/0xa0 [<c017babb>] ? trace_hardirqs_on+0xb/0x10 [<c0159abc>] get_signal_to_deliver+0x2ac/0x410 [<c0102849>] do_notify_resume+0xb9/0x890 [<c0178fd0>] ? trace_hardirqs_off_caller+0x20/0xd0 [<c017b163>] ? lock_release_holdtime+0x33/0x210 [<c0165b50>] ? autoremove_wake_function+0x0/0x50 [<c017ba54>] ? trace_hardirqs_on_caller+0x134/0x190 [<c017babb>] ? trace_hardirqs_on+0xb/0x10 [<c0300ba4>] ? security_file_permission+0x14/0x20 [<c0215761>] ? vfs_write+0x131/0x190 [<c0214f50>] ? do_sync_write+0x0/0x120 [<c0103115>] ? sysenter_do_call+0x27/0x32 [<c01032d2>] work_notifysig+0x13/0x21 CC: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Jan Kara <jack@suse.cz>
2009-12-23quota: Fix 64-bit limits setting on 32-bit archsJan Kara
Fix warnings: fs/quota/quota_v2.c: In function ‘v2_read_file_info’: fs/quota/quota_v2.c:123: warning: integer constant is too large for ‘long’ type fs/quota/quota_v2.c:124: warning: integer constant is too large for ‘long’ type Reported-by: Jerry Leo <jerryleo860202@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
2009-12-23ext3: Replace lock/unlock_super() with an explicit lock for resizingEric Sandeen
Use a separate lock to protect s_groups_count and the other block group descriptors which get changed via an on-line resize operation, so we can stop overloading the use of lock_super(). Port of ext4 commit 32ed5058ce90024efcd811254b4b1de0468099df by Theodore Ts'o <tytso@mit.edu>. CC: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz>
2009-12-23ext3: Replace lock/unlock_super() with an explicit lock for the orphan listEric Sandeen
Use a separate lock to protect the orphan list, so we can stop overloading the use of lock_super(). Port of ext4 commit 3b9d4ed26680771295d904a6b83e88e620780893 by Theodore Ts'o <tytso@mit.edu>. CC: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz>
2009-12-23ext3: ext3_mark_recovery_complete() doesn't need to use lock_superEric Sandeen
The function ext3_mark_recovery_complete() is called from two call paths: either (a) while mounting the filesystem, in which case there's no danger of any other CPU calling write_super() until the mount is completed, and (b) while remounting the filesystem read-write, in which case the fs core has already locked the superblock. This also allows us to take out a very vile unlock_super()/lock_super() pair in ext3_remount(). Port of ext4 commit a63c9eb2ce6f5028da90f282798232c4f398ceb8 by Theodore Ts'o <tytso@mit.edu>. CC: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz>
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