Hi,
I get the following lockdep complaint when test reiserfs in the 3.4
kernel using xfstests. Ideas?
[453445.527861] ======================================================
[453445.527977] [ INFO: possible circular locking dependency detected ]
[453445.528085] 3.4.0+ #73 Not tainted
[453445.528085] -------------------------------------------------------
[453445.528085] setfattr/25622 is trying to acquire lock:
[453445.528085] (&ei->tailpack){+.+.+.}, at: [<ffffffffa00d42b9>] reiserfs_vfs_truncate_file+0x29/0x50 [reiserfs]
[453445.528085]
[453445.528085] but task is already holding lock:
[453445.528085] (&REISERFS_SB(s)->lock){+.+.+.}, at: [<ffffffffa00f1299>] reiserfs_write_lock+0x39/0x60 [reiserfs]
[453445.528085]
[453445.528085] which lock already depends on the new lock.
[453445.528085]
[453445.528085]
[453445.528085] the existing dependency chain (in reverse order) is:
[453445.528085]
[453445.528085] -> #1 (&REISERFS_SB(s)->lock){+.+.+.}:
[453445.528085] [<ffffffff810b90e2>] lock_acquire+0x92/0x140
[453445.528085] [<ffffffff8161ff40>] mutex_lock_nested+0x70/0x360
[453445.528085] [<ffffffffa00f1299>] reiserfs_write_lock+0x39/0x60 [reiserfs]
[453445.528085] [<ffffffffa00d459f>] reiserfs_file_release+0x14f/0x340 [reiserfs]
[453445.528085] [<ffffffff8119569d>] fput+0xfd/0x270
[453445.528085] [<ffffffff81191a96>] filp_close+0x66/0x90
[453445.528085] [<ffffffff8105daf3>] put_files_struct+0x103/0x1c0
[453445.528085] [<ffffffff8105dc72>] exit_files+0x52/0x60
[453445.528085] [<ffffffff8105e134>] do_exit+0x174/0x900
[453445.528085] [<ffffffff8105ec0c>] do_group_exit+0x4c/0xb0
[453445.528085] [<ffffffff8105ec87>] sys_exit_group+0x17/0x20
[453445.528085] [<ffffffff8162bee9>] system_call_fastpath+0x16/0x1b
[453445.528085]
[453445.528085] -> #0 (&ei->tailpack){+.+.+.}:
[453445.528085] [<ffffffff810b85d8>] __lock_acquire+0x1658/0x1b80
[453445.528085] [<ffffffff810b90e2>] lock_acquire+0x92/0x140
[453445.528085] [<ffffffff8161ff40>] mutex_lock_nested+0x70/0x360
[453445.528085] [<ffffffffa00d42b9>] reiserfs_vfs_truncate_file+0x29/0x50 [reiserfs]
[453445.528085] [<ffffffff8113e383>] vmtruncate+0x53/0x60
[453445.528085] [<ffffffffa00d41da>] reiserfs_setattr+0x2ea/0x3a0 [reiserfs]
[453445.528085] [<ffffffffa00f06bb>] reiserfs_xattr_set_handle+0x47b/0x4e0 [reiserfs]
[453445.528085] [<ffffffffa00f07dc>] reiserfs_xattr_set+0xbc/0x160 [reiserfs]
[453445.528085] [<ffffffffa00f1467>] user_set+0x77/0x90 [reiserfs]
[453445.528085] [<ffffffffa00f0cc8>] reiserfs_setxattr+0xb8/0xf0 [reiserfs]
[453445.528085] [<ffffffff811b724b>] __vfs_setxattr_noperm+0x7b/0x1c0
[453445.528085] [<ffffffff811b7454>] vfs_setxattr+0xc4/0xd0
[453445.528085] [<ffffffff811b7553>] setxattr+0xf3/0x1a0
[453445.528085] [<ffffffff811b78e5>] sys_lsetxattr+0x95/0xb0
[453445.528085] [<ffffffff8162bee9>] system_call_fastpath+0x16/0x1b
[453445.528085]
[453445.528085] other info that might help us debug this:
[453445.528085]
[453445.528085] Possible unsafe locking scenario:
[453445.528085]
[453445.528085] CPU0 CPU1
[453445.528085] ---- ----
[453445.528085] lock(&REISERFS_SB(s)->lock);
[453445.528085] lock(&ei->tailpack);
[453445.528085] lock(&REISERFS_SB(s)->lock);
[453445.528085] lock(&ei->tailpack);
[453445.528085]
[453445.528085] *** DEADLOCK ***
[453445.528085]
[453445.528085] 4 locks held by setfattr/25622:
[453445.528085] #0: (&sb->s_type->i_mutex_key#14){+.+.+.}, at: [<ffffffff811b740d>] vfs_setxattr+0x7d/0xd0
[453445.528085] #1: (&REISERFS_I(inode)->i_xattr_sem){++++..}, at: [<ffffffffa00f02de>] reiserfs_xattr_set_handle+0x9e/0x4e0 [reiserfs]
[453445.528085] #2: (&sb->s_type->i_mutex_key#14/3){+.+...}, at: [<ffffffffa00f0696>] reiserfs_xattr_set_handle+0x456/0x4e0 [reiserfs]
[453445.528085] #3: (&REISERFS_SB(s)->lock){+.+.+.}, at: [<ffffffffa00f1299>] reiserfs_write_lock+0x39/0x60 [reiserfs]
[453445.528085]
[453445.528085] stack backtrace:
[453445.528085] Pid: 25622, comm: setfattr Not tainted 3.4.0+ #73
[453445.528085] Call Trace:
[453445.528085] [<ffffffff816180a5>] print_circular_bug+0x1fb/0x20c
[453445.528085] [<ffffffff811319ca>] ? find_get_pages+0x2a/0x210
[453445.528085] [<ffffffff810b85d8>] __lock_acquire+0x1658/0x1b80
[453445.528085] [<ffffffff810b9b95>] ? trace_hardirqs_on_caller+0x105/0x190
[453445.528085] [<ffffffff81620e45>] ? __mutex_unlock_slowpath+0xe5/0x180
[453445.528085] [<ffffffffa00d42b9>] ? reiserfs_vfs_truncate_file+0x29/0x50 [reiserfs]
[453445.528085] [<ffffffff810b90e2>] lock_acquire+0x92/0x140
[453445.528085] [<ffffffffa00d42b9>] ? reiserfs_vfs_truncate_file+0x29/0x50 [reiserfs]
[453445.528085] [<ffffffff8161ff40>] mutex_lock_nested+0x70/0x360
[453445.528085] [<ffffffffa00d42b9>] ? reiserfs_vfs_truncate_file+0x29/0x50 [reiserfs]
[453445.528085] [<ffffffffa00d42b9>] reiserfs_vfs_truncate_file+0x29/0x50 [reiserfs]
[453445.528085] [<ffffffff8113e383>] vmtruncate+0x53/0x60
[453445.528085] [<ffffffffa00d41da>] reiserfs_setattr+0x2ea/0x3a0 [reiserfs]
[453445.528085] [<ffffffff81620160>] ? mutex_lock_nested+0x290/0x360
[453445.528085] [<ffffffffa00f06bb>] reiserfs_xattr_set_handle+0x47b/0x4e0 [reiserfs]
[453445.528085] [<ffffffffa00f07dc>] reiserfs_xattr_set+0xbc/0x160 [reiserfs]
[453445.528085] [<ffffffffa00f1467>] user_set+0x77/0x90 [reiserfs]
[453445.528085] [<ffffffffa00f0cc8>] reiserfs_setxattr+0xb8/0xf0 [reiserfs]
[453445.528085] [<ffffffff811b724b>] __vfs_setxattr_noperm+0x7b/0x1c0
[453445.528085] [<ffffffff811b7454>] vfs_setxattr+0xc4/0xd0
[453445.528085] [<ffffffff811b7553>] setxattr+0xf3/0x1a0
[453445.528085] [<ffffffff8119f403>] ? putname+0x33/0x50
[453445.528085] [<ffffffff811a3cb3>] ? user_path_at_empty+0x63/0xa0
[453445.528085] [<ffffffff8115c556>] ? do_brk+0x246/0x360
[453445.528085] [<ffffffff81623cd5>] ? retint_swapgs+0x13/0x1b
[453445.528085] [<ffffffff811b78e5>] sys_lsetxattr+0x95/0xb0
[453445.528085] [<ffffffff8162bee9>] system_call_fastpath+0x16/0x1b
--
Best Regards,
Artem Bityutskiy
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