Am 07.11.2006 13:52 schrieb Srinivasa Ds:
> This looks like a different problem which got revealed after my patch 
> got applied. Please test below patch and let me know your comments.

This reveals another one. Now I get:

Nov  8 00:47:27 gx110 kernel: [  285.838595]
Nov  8 00:47:27 gx110 kernel: [  285.838602] =======================================================
Nov  8 00:47:27 gx110 kernel: [  285.838628] [ INFO: possible circular locking dependency detected ]
Nov  8 00:47:27 gx110 kernel: [  285.838639] 2.6.19-rc4-noinitrd #3
Nov  8 00:47:27 gx110 kernel: [  285.838646] -------------------------------------------------------
Nov  8 00:47:27 gx110 kernel: [  285.838656] kdm/3237 is trying to acquire lock:
Nov  8 00:47:27 gx110 kernel: [  285.838664]  (&inode->i_mutex/2){--..}, at: [<c01c29d2>] reiserfs_xattr_set+0xe9/0x2c3
Nov  8 00:47:27 gx110 kernel: [  285.838709]
Nov  8 00:47:27 gx110 kernel: [  285.838711] but task is already holding lock:
Nov  8 00:47:27 gx110 kernel: [  285.838719]  (&REISERFS_SB(s)->xattr_dir_sem){----}, at: [<c01c3992>] reiserfs_acl_chmod+0x116/0x180
Nov  8 00:47:27 gx110 kernel: [  285.838744]
Nov  8 00:47:27 gx110 kernel: [  285.838746] which lock already depends on the new lock.
Nov  8 00:47:27 gx110 kernel: [  285.838749]
Nov  8 00:47:27 gx110 kernel: [  285.838758]
Nov  8 00:47:27 gx110 kernel: [  285.838760] the existing dependency chain (in reverse order) is:
Nov  8 00:47:27 gx110 kernel: [  285.838769]
Nov  8 00:47:27 gx110 kernel: [  285.838771] -> #3 (&REISERFS_SB(s)->xattr_dir_sem){----}:
Nov  8 00:47:27 gx110 kernel: [  285.838785]        [<c012fcb7>] add_lock_to_list+0x62/0x7e
Nov  8 00:47:27 gx110 kernel: [  285.838814]        [<c0130577>] __lock_acquire+0x8a4/0x99c
Nov  8 00:47:27 gx110 kernel: [  285.838834]        [<c0130930>] lock_acquire+0x5b/0x7b
Nov  8 00:47:27 gx110 kernel: [  285.838853]        [<c012c8c5>] down_read+0x3a/0x4b
Nov  8 00:47:27 gx110 kernel: [  285.838891]        [<c01c3820>] reiserfs_cache_default_acl+0x43/0x9f
Nov  8 00:47:27 gx110 kernel: [  285.838912]        [<c01a2824>] reiserfs_create+0x68/0x1e3
Nov  8 00:47:27 gx110 kernel: [  285.838936]        [<c016a559>] vfs_create+0xd1/0x149
Nov  8 00:47:27 gx110 kernel: [  285.839030]        [<c016a738>] open_namei+0x167/0x57f
Nov  8 00:47:27 gx110 kernel: [  285.839056]        [<c0160ba4>] do_filp_open+0x26/0x3b
Nov  8 00:47:27 gx110 kernel: [  285.839086]        [<c0160cc3>] do_sys_open+0x43/0xc2
Nov  8 00:47:27 gx110 kernel: [  285.839112]        [<c0160d79>] sys_open+0x1a/0x1c
Nov  8 00:47:27 gx110 kernel: [  285.839138]        [<c0102dfd>] sysenter_past_esp+0x56/0x8d
Nov  8 00:47:27 gx110 kernel: [  285.839170]        [<ffffffff>] 0xffffffff
Nov  8 00:47:27 gx110 kernel: [  285.839224]
Nov  8 00:47:27 gx110 kernel: [  285.839226] -> #2 (&REISERFS_I(inode)->xattr_sem){----}:
Nov  8 00:47:27 gx110 kernel: [  285.839253]        [<c012fcb7>] add_lock_to_list+0x62/0x7e
Nov  8 00:47:27 gx110 kernel: [  285.839280]        [<c0130577>] __lock_acquire+0x8a4/0x99c
Nov  8 00:47:27 gx110 kernel: [  285.839307]        [<c0130930>] lock_acquire+0x5b/0x7b
Nov  8 00:47:27 gx110 kernel: [  285.839333]        [<c012c8c5>] down_read+0x3a/0x4b
Nov  8 00:47:27 gx110 kernel: [  285.839360]        [<c01c380a>] reiserfs_cache_default_acl+0x2d/0x9f
Nov  8 00:47:27 gx110 kernel: [  285.839388]        [<c01a2824>] reiserfs_create+0x68/0x1e3
Nov  8 00:47:27 gx110 kernel: [  285.839415]        [<c016a559>] vfs_create+0xd1/0x149
Nov  8 00:47:27 gx110 kernel: [  285.839441]        [<c016a738>] open_namei+0x167/0x57f
Nov  8 00:47:27 gx110 kernel: [  285.839467]        [<c0160ba4>] do_filp_open+0x26/0x3b
Nov  8 00:47:27 gx110 kernel: [  285.839493]        [<c0160cc3>] do_sys_open+0x43/0xc2
Nov  8 00:47:27 gx110 kernel: [  285.839519]        [<c0160d79>] sys_open+0x1a/0x1c
Nov  8 00:47:27 gx110 kernel: [  285.839544]        [<c0102dfd>] sysenter_past_esp+0x56/0x8d
Nov  8 00:47:27 gx110 kernel: [  285.839571]        [<ffffffff>] 0xffffffff
Nov  8 00:47:27 gx110 kernel: [  285.839597]
Nov  8 00:47:27 gx110 kernel: [  285.839599] -> #1 (&inode->i_mutex){--..}:
Nov  8 00:47:27 gx110 kernel: [  285.839625]        [<c012fcb7>] add_lock_to_list+0x62/0x7e
Nov  8 00:47:27 gx110 kernel: [  285.839651]        [<c0130577>] __lock_acquire+0x8a4/0x99c
Nov  8 00:47:27 gx110 kernel: [  285.839678]        [<c0130930>] lock_acquire+0x5b/0x7b
Nov  8 00:47:27 gx110 kernel: [  285.839704]        [<c035ab6d>] __mutex_lock_slowpath+0xc6/0x23a
Nov  8 00:47:27 gx110 kernel: [  285.839739]        [<c035acfd>] mutex_lock+0x1c/0x1f
Nov  8 00:47:27 gx110 kernel: [  285.839765]        [<c01685fc>] vfs_rename+0x2d2/0x489
Nov  8 00:47:27 gx110 kernel: [  285.839805]        [<c016a01d>] sys_renameat+0x174/0x1d9
Nov  8 00:47:27 gx110 kernel: [  285.839831]        [<c016a0aa>] sys_rename+0x28/0x2a
Nov  8 00:47:27 gx110 kernel: [  285.839856]        [<c0102dfd>] sysenter_past_esp+0x56/0x8d
Nov  8 00:47:27 gx110 kernel: [  285.839883]        [<ffffffff>] 0xffffffff
Nov  8 00:47:27 gx110 kernel: [  285.839964]
Nov  8 00:47:27 gx110 kernel: [  285.839966] -> #0 (&inode->i_mutex/2){--..}:
Nov  8 00:47:27 gx110 kernel: [  285.839994]        [<c012fc1f>] print_circular_bug_tail+0x30/0x66
Nov  8 00:47:27 gx110 kernel: [  285.840022]        [<c0130476>] __lock_acquire+0x7a3/0x99c
Nov  8 00:47:27 gx110 kernel: [  285.840049]        [<c0130930>] lock_acquire+0x5b/0x7b
Nov  8 00:47:27 gx110 kernel: [  285.840075]        [<c035add9>] mutex_lock_nested+0xd9/0x24d
Nov  8 00:47:27 gx110 kernel: [  285.840102]        [<c01c29d2>] reiserfs_xattr_set+0xe9/0x2c3
Nov  8 00:47:27 gx110 kernel: [  285.840129]        [<c01c33fb>] reiserfs_set_acl+0x18d/0x204
Nov  8 00:47:27 gx110 kernel: [  285.840157]        [<c01c39a0>] reiserfs_acl_chmod+0x124/0x180
Nov  8 00:47:27 gx110 kernel: [  285.840185]        [<c01a3c49>] reiserfs_setattr+0x20b/0x243
Nov  8 00:47:27 gx110 kernel: [  285.840214]        [<c0173963>] notify_change+0x135/0x2c2
Nov  8 00:47:27 gx110 kernel: [  285.840254]        [<c015fbbf>] sys_fchmodat+0xa5/0xcf
Nov  8 00:47:27 gx110 kernel: [  285.840280]        [<c015fc0a>] sys_chmod+0x21/0x23
Nov  8 00:47:27 gx110 kernel: [  285.840306]        [<c0102dfd>] sysenter_past_esp+0x56/0x8d
Nov  8 00:47:27 gx110 kernel: [  285.840333]        [<ffffffff>] 0xffffffff
Nov  8 00:47:27 gx110 kernel: [  285.840360]
Nov  8 00:47:27 gx110 kernel: [  285.840362] other info that might help us debug this:
Nov  8 00:47:27 gx110 kernel: [  285.840365]
Nov  8 00:47:27 gx110 kernel: [  285.840397] 3 locks held by kdm/3237:
Nov  8 00:47:27 gx110 kernel: [  285.840410]  #0:  (&inode->i_mutex/1){--..}, at: [<c015fb8b>] sys_fchmodat+0x71/0xcf
Nov  8 00:47:28 gx110 kernel: [  285.840438]  #1:  (&REISERFS_I(inode)->xattr_sem){----}, at: [<c01c395d>] reiserfs_acl_chmod+0xe1/0x180
Nov  8 00:47:28 gx110 kernel: [  285.840468]  #2:  (&REISERFS_SB(s)->xattr_dir_sem){----}, at: [<c01c3992>] reiserfs_acl_chmod+0x116/0x180
Nov  8 00:47:28 gx110 kernel: [  285.840497]
Nov  8 00:47:28 gx110 kernel: [  285.840499] stack backtrace:
Nov  8 00:47:28 gx110 kernel: [  285.840526]  [<c0103dc4>] dump_trace+0x64/0x1cc
Nov  8 00:47:28 gx110 kernel: [  285.840554]  [<c0103f45>] show_trace_log_lvl+0x19/0x2e
Nov  8 00:47:28 gx110 kernel: [  285.840578]  [<c01042a2>] show_trace+0x12/0x14
Nov  8 00:47:28 gx110 kernel: [  285.840601]  [<c01042bb>] dump_stack+0x17/0x19
Nov  8 00:47:28 gx110 kernel: [  285.840623]  [<c012fc4c>] print_circular_bug_tail+0x5d/0x66
Nov  8 00:47:28 gx110 kernel: [  285.840646]  [<c0130476>] __lock_acquire+0x7a3/0x99c
Nov  8 00:47:28 gx110 kernel: [  285.840668]  [<c0130930>] lock_acquire+0x5b/0x7b
Nov  8 00:47:28 gx110 kernel: [  285.840691]  [<c035add9>] mutex_lock_nested+0xd9/0x24d
Nov  8 00:47:28 gx110 kernel: [  285.840713]  [<c01c29d2>] reiserfs_xattr_set+0xe9/0x2c3
Nov  8 00:47:28 gx110 kernel: [  285.840736]  [<c01c33fb>] reiserfs_set_acl+0x18d/0x204
Nov  8 00:47:28 gx110 kernel: [  285.840760]  [<c01c39a0>] reiserfs_acl_chmod+0x124/0x180
Nov  8 00:47:28 gx110 kernel: [  285.840783]  [<c01a3c49>] reiserfs_setattr+0x20b/0x243
Nov  8 00:47:28 gx110 kernel: [  285.840806]  [<c0173963>] notify_change+0x135/0x2c2
Nov  8 00:47:28 gx110 kernel: [  285.840829]  [<c015fbbf>] sys_fchmodat+0xa5/0xcf
Nov  8 00:47:28 gx110 kernel: [  285.840851]  [<c015fc0a>] sys_chmod+0x21/0x23
Nov  8 00:47:28 gx110 kernel: [  285.840872]  [<c0102dfd>] sysenter_past_esp+0x56/0x8d
Nov  8 00:47:28 gx110 kernel: [  285.840898] DWARF2 unwinder stuck at sysenter_past_esp+0x56/0x8d
Nov  8 00:47:28 gx110 kernel: [  285.840914]
Nov  8 00:47:28 gx110 kernel: [  285.840927] Leftover inexact backtrace:
Nov  8 00:47:28 gx110 kernel: [  285.840930]
Nov  8 00:47:28 gx110 kernel: [  285.840951]  =======================

Thanks
Tilman

-- 
Tilman Schmidt                          E-Mail: tilman@imap.cc
Bonn, Germany
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