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Date: Sun, 15 Mar 2009 14:59:01 +0200
From: Denys Fedoryschenko <denys@...p.net.lb>
To: linux-xfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: XFS lock warning, 2.6.29-rc8
hi
Here is what i got suddently. But seems everything is working.
If any other information required, please let me know.
/dev/md2 on / type xfs (rw,noatime)
[39993.560200]
[39993.560202] =======================================================
[39993.560206] [ INFO: possible circular locking dependency detected ]
[39993.560208] 2.6.29-rc8-home1 #2
[39993.560210] -------------------------------------------------------
[39993.560212] kmail/5077 is trying to acquire lock:
[39993.560214] (&(&ip->i_iolock)->mr_lock){----}, at: [<ffffffff811426aa>]
xfs_ilock+0x27/0x79
[39993.560222]
[39993.560223] but task is already holding lock:
[39993.560225] (&mm->mmap_sem){----}, at: [<ffffffff81095090>]
sys_munmap+0x32/0x59
[39993.560230]
[39993.560231] which lock already depends on the new lock.
[39993.560232]
[39993.560233]
[39993.560234] the existing dependency chain (in reverse order) is:
[39993.560236]
[39993.560236] -> #1 (&mm->mmap_sem){----}:
[39993.560240] [<ffffffff8105b9fc>] __lock_acquire+0x12b0/0x161a
[39993.560244] [<ffffffff8105bdbb>] lock_acquire+0x55/0x71
[39993.560247] [<ffffffff813fc2a5>] down_read+0x34/0x41
[39993.560252] [<ffffffff813ffbfe>] do_page_fault+0x3fa/0x848
[39993.560256] [<ffffffff813fda2f>] page_fault+0x1f/0x30
[39993.560258] [<ffffffff8107e13d>] generic_file_aio_read+0x35f/0x5da
[39993.560268] [<ffffffff811650d8>] xfs_read+0x17d/0x1f5
[39993.560272] [<ffffffff81161646>] xfs_file_aio_read+0x5f/0x61
[39993.560275] [<ffffffff810a88ff>] do_sync_read+0xe7/0x12d
[39993.560284] [<ffffffff810a928c>] vfs_read+0xab/0x134
[39993.560287] [<ffffffff810a93d9>] sys_read+0x47/0x6f
[39993.560289] [<ffffffff8100c0db>] system_call_fastpath+0x16/0x1b
[39993.560293] [<ffffffffffffffff>] 0xffffffffffffffff
[39993.560302]
[39993.560302] -> #0 (&(&ip->i_iolock)->mr_lock){----}:
[39993.560306] [<ffffffff8105b6cb>] __lock_acquire+0xf7f/0x161a
[39993.560309] [<ffffffff8105bdbb>] lock_acquire+0x55/0x71
[39993.560312] [<ffffffff8104ebde>] down_write_nested+0x37/0x46
[39993.560316] [<ffffffff811426aa>] xfs_ilock+0x27/0x79
[39993.560318] [<ffffffff8115b40e>] xfs_inactive+0x14d/0x411
[39993.560322] [<ffffffff8116552f>] xfs_fs_clear_inode+0x83/0x85
[39993.560325] [<ffffffff810ba8f7>] clear_inode+0x8a/0xe3
[39993.560329] [<ffffffff810bb044>] generic_delete_inode+0xf8/0x173
[39993.560332] [<ffffffff810bb0d6>] generic_drop_inode+0x17/0x1d5
[39993.560335] [<ffffffff810ba1c7>] iput+0x61/0x65
[39993.560338] [<ffffffff810b7554>] dentry_iput+0xa9/0xc1
[39993.560341] [<ffffffff810b7651>] d_kill+0x40/0x60
[39993.560344] [<ffffffff810b942d>] dput+0x141/0x14e
[39993.560347] [<ffffffff810a9a85>] __fput+0x173/0x198
[39993.560350] [<ffffffff810a9ac2>] fput+0x18/0x1a
[39993.560353] [<ffffffff8109411e>] remove_vma+0x3e/0x63
[39993.560355] [<ffffffff8109503c>] do_munmap+0x2e9/0x30b
[39993.560358] [<ffffffff8109509e>] sys_munmap+0x40/0x59
[39993.560361] [<ffffffff8100c0db>] system_call_fastpath+0x16/0x1b
[39993.560363] [<ffffffffffffffff>] 0xffffffffffffffff
[39993.560366]
[39993.560367] other info that might help us debug this:
[39993.560368]
[39993.560370] 1 lock held by kmail/5077:
[39993.560371] #0: (&mm->mmap_sem){----}, at: [<ffffffff81095090>]
sys_munmap+0x32/0x59
[39993.560376]
[39993.560377] stack backtrace:
[39993.560379] Pid: 5077, comm: kmail Not tainted 2.6.29-rc8-home1 #2
[39993.560381] Call Trace:
[39993.560384] [<ffffffff8105a366>] print_circular_bug_tail+0xc5/0xd0
[39993.560388] [<ffffffff8105b6cb>] __lock_acquire+0xf7f/0x161a
[39993.560391] [<ffffffff8105bdbb>] lock_acquire+0x55/0x71
[39993.560393] [<ffffffff811426aa>] ? xfs_ilock+0x27/0x79
[39993.560396] [<ffffffff8104ebde>] down_write_nested+0x37/0x46
[39993.560399] [<ffffffff811426aa>] ? xfs_ilock+0x27/0x79
[39993.560401] [<ffffffff811426aa>] xfs_ilock+0x27/0x79
[39993.560404] [<ffffffff8115b40e>] xfs_inactive+0x14d/0x411
[39993.560407] [<ffffffff8116552f>] xfs_fs_clear_inode+0x83/0x85
[39993.560410] [<ffffffff810ba8f7>] clear_inode+0x8a/0xe3
[39993.560413] [<ffffffff810bb044>] generic_delete_inode+0xf8/0x173
[39993.560416] [<ffffffff810bb0d6>] generic_drop_inode+0x17/0x1d5
[39993.560419] [<ffffffff810ba1c7>] iput+0x61/0x65
[39993.560421] [<ffffffff810b7554>] dentry_iput+0xa9/0xc1
[39993.560424] [<ffffffff810b7651>] d_kill+0x40/0x60
[39993.560427] [<ffffffff810b942d>] dput+0x141/0x14e
[39993.560429] [<ffffffff810a9a85>] __fput+0x173/0x198
[39993.560432] [<ffffffff810a9ac2>] fput+0x18/0x1a
[39993.560434] [<ffffffff8109411e>] remove_vma+0x3e/0x63
[39993.560437] [<ffffffff8109503c>] do_munmap+0x2e9/0x30b
[39993.560440] [<ffffffff8109509e>] sys_munmap+0x40/0x59
[39993.560442] [<ffffffff8100c0db>] system_call_fastpath+0x16/0x1b
--
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