From: Ben Myers <bpm@sgi.com>
To: Dave Chinner <david@fromorbit.com>
Cc: Christoph Hellwig <hch@infradead.org>,
Mark Tinguely <tinguely@sgi.com>,
xfs@oss.sgi.com
Subject: [PATCH] xfs: stop the sync worker before xfs_unmountfs
Date: Thu, 13 Sep 2012 16:18:47 -0500 [thread overview]
Message-ID: <20120913211847.GS3274@sgi.com> (raw)
In-Reply-To: <20120913164344.GV25175@sgi.com>
Cancel work of the xfs_sync_worker before teardown of the log in
xfs_unmountfs. This prevents occasional crashes on unmount like so:
PID: 21602 TASK: ee9df060 CPU: 0 COMMAND: "kworker/0:3"
#0 [c5377d28] crash_kexec at c0292c94
#1 [c5377d80] oops_end at c07090c2
#2 [c5377d98] no_context at c06f614e
#3 [c5377dbc] __bad_area_nosemaphore at c06f6281
#4 [c5377df4] bad_area_nosemaphore at c06f629b
#5 [c5377e00] do_page_fault at c070b0cb
#6 [c5377e7c] error_code (via page_fault) at c070892c
EAX: f300c6a8 EBX: f300c6a8 ECX: 000000c0 EDX: 000000c0 EBP: c5377ed0
DS: 007b ESI: 00000000 ES: 007b EDI: 00000001 GS: ffffad20
CS: 0060 EIP: c0481ad0 ERR: ffffffff EFLAGS: 00010246
#7 [c5377eb0] atomic64_read_cx8 at c0481ad0
#8 [c5377ebc] xlog_assign_tail_lsn_locked at f7cc7c6e [xfs]
#9 [c5377ed4] xfs_trans_ail_delete_bulk at f7ccd520 [xfs]
#10 [c5377f0c] xfs_buf_iodone at f7ccb602 [xfs]
#11 [c5377f24] xfs_buf_do_callbacks at f7cca524 [xfs]
#12 [c5377f30] xfs_buf_iodone_callbacks at f7cca5da [xfs]
#13 [c5377f4c] xfs_buf_iodone_work at f7c718d0 [xfs]
#14 [c5377f58] process_one_work at c024ee4c
#15 [c5377f98] worker_thread at c024f43d
#16 [c5377fbc] kthread at c025326b
#17 [c5377fe8] kernel_thread_helper at c070e834
PID: 26653 TASK: e79143b0 CPU: 3 COMMAND: "umount"
#0 [cde0fda0] __schedule at c0706595
#1 [cde0fe28] schedule at c0706b89
#2 [cde0fe30] schedule_timeout at c0705600
#3 [cde0fe94] __down_common at c0706098
#4 [cde0fec8] __down at c0706122
#5 [cde0fed0] down at c025936f
#6 [cde0fee0] xfs_buf_lock at f7c7131d [xfs]
#7 [cde0ff00] xfs_freesb at f7cc2236 [xfs]
#8 [cde0ff10] xfs_fs_put_super at f7c80f21 [xfs]
#9 [cde0ff1c] generic_shutdown_super at c0333d7a
#10 [cde0ff38] kill_block_super at c0333e0f
#11 [cde0ff48] deactivate_locked_super at c0334218
#12 [cde0ff58] deactivate_super at c033495d
#13 [cde0ff68] mntput_no_expire at c034bc13
#14 [cde0ff7c] sys_umount at c034cc69
#15 [cde0ffa0] sys_oldumount at c034ccd4
#16 [cde0ffb0] system_call at c0707e66
commit 11159a05 added this to xfs_log_unmount and needs to be cleaned up
at a later date.
Signed-off-by: Ben Myers <bpm@sgi.com>
Index: xfs/fs/xfs/xfs_super.c
===================================================================
--- xfs.orig/fs/xfs/xfs_super.c
+++ xfs/fs/xfs/xfs_super.c
@@ -919,6 +919,7 @@ xfs_fs_put_super(
struct xfs_mount *mp = XFS_M(sb);
xfs_filestream_unmount(mp);
+ cancel_delayed_work_sync(&mp->m_sync_work);
xfs_unmountfs(mp);
xfs_syncd_stop(mp);
xfs_freesb(mp);
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next prev parent reply other threads:[~2012-09-13 21:17 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20120829134624.316257238@sgi.com>
2012-08-29 13:46 ` [PATCH] xfs: flush workers before stopping log tinguely
2012-08-29 14:31 ` Mark Tinguely
2012-08-30 0:23 ` Dave Chinner
2012-08-30 17:25 ` Ben Myers
2012-08-30 22:35 ` Dave Chinner
2012-08-31 18:15 ` Mark Tinguely
2012-09-01 23:08 ` Christoph Hellwig
2012-09-12 18:33 ` xfs: stop the sync worker before xfs_unmountfs Ben Myers
2012-09-12 23:14 ` Dave Chinner
2012-09-13 16:43 ` Ben Myers
2012-09-13 21:18 ` Ben Myers [this message]
2012-09-14 1:07 ` [PATCH] " Dave Chinner
2012-09-18 13:28 ` Mark Tinguely
2012-09-13 8:17 ` Christoph Hellwig
2012-09-13 21:19 ` Ben Myers
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