Messages in this thread | | | Date | Sun, 11 Oct 2009 01:09:50 +0200 (CEST) | From | John Kacur <> | Subject | INFO: possible circular locking dependency detected |
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======================================================= [ INFO: possible circular locking dependency detected ] 2.6.32-rc3 #1 ------------------------------------------------------- mono/3284 is trying to acquire lock: (&(&ip->i_iolock)->mr_lock){++++++}, at: [<ffffffffa005b3b8>] xfs_ilock+0x3a/0xa3 [xfs]
but task is already holding lock: (&mm->mmap_sem){++++++}, at: [<ffffffff8111f353>] sys_munmap+0x45/0x83
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&mm->mmap_sem){++++++}: [<ffffffff8109caff>] __lock_acquire+0xc04/0xde2 [<ffffffff8109cdc0>] lock_acquire+0xe3/0x114 [<ffffffff811162cf>] might_fault+0x9f/0xd8 [<ffffffff810f9047>] file_read_actor+0xdc/0x166 [<ffffffff810fb743>] generic_file_aio_read+0x381/0x5d5 [<ffffffffa0082630>] xfs_read+0x185/0x209 [xfs] [<ffffffffa007e162>] xfs_file_aio_read+0x72/0x88 [xfs] [<ffffffff8114290e>] do_sync_read+0xf9/0x152 [<ffffffff811435d9>] vfs_read+0xbb/0x12c [<ffffffff81143740>] sys_read+0x56/0x93 [<ffffffff8100bf6b>] system_call_fastpath+0x16/0x1b
-> #0 (&(&ip->i_iolock)->mr_lock){++++++}: [<ffffffff8109c9d7>] __lock_acquire+0xadc/0xde2 [<ffffffff8109cdc0>] lock_acquire+0xe3/0x114 [<ffffffff81089d72>] down_write_nested+0x57/0xa2 [<ffffffffa005b3b8>] xfs_ilock+0x3a/0xa3 [xfs] [<ffffffffa0076843>] xfs_free_eofblocks+0x115/0x21a [xfs] [<ffffffffa00772ff>] xfs_release+0x146/0x169 [xfs] [<ffffffffa007dfc0>] xfs_file_release+0x23/0x3b [xfs] [<ffffffff811440ed>] __fput+0x12a/0x1ec [<ffffffff811441da>] fput+0x2b/0x41 [<ffffffff8111df77>] remove_vma+0x5f/0xad [<ffffffff8111f2d8>] do_munmap+0x313/0x349 [<ffffffff8111f361>] sys_munmap+0x53/0x83 [<ffffffff8100bf6b>] system_call_fastpath+0x16/0x1b
other info that might help us debug this:
1 lock held by mono/3284: #0: (&mm->mmap_sem){++++++}, at: [<ffffffff8111f353>] sys_munmap+0x45/0x83
stack backtrace: Pid: 3284, comm: mono Not tainted 2.6.32-rc3 #1 Call Trace: [<ffffffff8109ba46>] print_circular_bug+0xc2/0xe7 [<ffffffff8109c9d7>] __lock_acquire+0xadc/0xde2 [<ffffffffa005b3b8>] ? xfs_ilock+0x3a/0xa3 [xfs] [<ffffffffa005b3b8>] ? xfs_ilock+0x3a/0xa3 [xfs] [<ffffffff8109cdc0>] lock_acquire+0xe3/0x114 [<ffffffffa005b3b8>] ? xfs_ilock+0x3a/0xa3 [xfs] [<ffffffff81089d72>] down_write_nested+0x57/0xa2 [<ffffffffa005b3b8>] ? xfs_ilock+0x3a/0xa3 [xfs] [<ffffffffa00722af>] ? xfs_trans_alloc+0xa7/0xc8 [xfs] [<ffffffffa005b3b8>] xfs_ilock+0x3a/0xa3 [xfs] [<ffffffffa0076843>] xfs_free_eofblocks+0x115/0x21a [xfs] [<ffffffff8104c1b8>] ? get_parent_ip+0x20/0x67 [<ffffffffa00772ff>] xfs_release+0x146/0x169 [xfs] [<ffffffffa007dfc0>] xfs_file_release+0x23/0x3b [xfs] [<ffffffff811440ed>] __fput+0x12a/0x1ec [<ffffffff8111ddf1>] ? tlb_finish_mmu+0x6c/0x90 [<ffffffff811441da>] fput+0x2b/0x41 [<ffffffff8111df77>] remove_vma+0x5f/0xad [<ffffffff8111f2d8>] do_munmap+0x313/0x349 [<ffffffff81428853>] ? down_write+0x80/0x9d [<ffffffff8111f361>] sys_munmap+0x53/0x83 [<ffffffff8100bf6b>] system_call_fastpath+0x16/0x1b
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