http://bugzilla.kernel.org/show_bug.cgi?id=14452
Summary: Syscall to ftruncate hangs on ext4 + mdadm raid0
filesystem on a file preallocated with fallocate
Product: File System
Version: 2.5
Kernel Version: 2.6.31.1
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: blocking
Priority: P1
Component: ext4
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No
My program creates a big file (around 30 GB) with posix_fallocate (to utilize
extents), fills it with data and uses ftruncate to crop it to its final size
(usually somewhere between 20 and 25 GB). The problem is that in around 5% of
the cases, the program locks up completely in a syscall. The process can thus
not be killed even with kill -9, and a reboot is all that will do.
Here is the contents of my /proc/PID/syscall:
76 0xee4a80 0x486d6aaf8 0x36390113f8 0x7fffc63cd350 0xecc050
0x7fffc63cd3f0 0x7fffc63cd5c8 0x36380e0cc7
Syscall 76 is as far as I can tell getrlimit, which I do not call. It
must have been called somewhere from ftruncate.
The file is on a software raid 0 mount with two disks, handled by
mdadm. I have reported the problem to the md people but they insist
it's an ext4 problem.
I have also tried closing the file and opening it again prior to the
ftruncate. No change.
There are no other strange phenomena whatsoever with ext4. This
problem only arises in this particular situation.
I'm running Fedora on an x86_64 system.
I have tried this on several kernel versions, the last one 2.6.31.1.
It has persisted all the way since the 2.6.29 kernel that originally shipped
with Fedora 11.
Following is all data generated by sysrq + w (hung processes).
Drdbmake, receptd and nodeserv are my own processes.
[6130704.521614] SysRq : Show Blocked State
[6130704.521696] task PC stack pid father
[6130704.521702] pdflush D ffff8801f4ce9bdc 0 269 2
[6130704.521707] ffff88021e551960 0000000000000046 ffff88021e5b56e0
ffff8800d3506a80
[6130704.521712] 0000000000010e80 000000000000c748 ffff88021fa24740
ffff88021f843900
[6130704.521717] ffff88021fa24ab0 0000000100000008 000000025819ca1c
0080001000800013
[6130704.521721] Call Trace:
[6130704.521731] [<ffffffff813a9639>] schedule+0x9/0x20
[6130704.521735] [<ffffffff813ab2d5>] __down_read+0x85/0xb7
[6130704.521738] [<ffffffff813aa565>] down_read+0x25/0x30
[6130704.521743] [<ffffffff8114e6f2>] ext4_get_blocks_wrap+0x52/0x290
[6130704.521747] [<ffffffff8114f601>] mpage_da_map_blocks+0xd1/0x7a0
[6130704.521752] [<ffffffff8109d12c>] ? write_cache_pages+0x2fc/0x470
[6130704.521756] [<ffffffff81150330>] ? __mpage_da_writepage+0x0/0x180
[6130704.521760] [<ffffffff8114ffdb>] ext4_da_writepages+0x30b/0x590
[6130704.521764] [<ffffffff8103d91b>] ? finish_task_switch+0x5b/0xd0
[6130704.521768] [<ffffffff8109d2f8>] do_writepages+0x28/0x50
[6130704.521773] [<ffffffff810e60fb>] __writeback_single_inode+0x9b/0x3e0
[6130704.521777] [<ffffffff8104f830>] ? process_timeout+0x0/0x10
[6130704.521781] [<ffffffff813a8827>] ? io_schedule_timeout+0x37/0x50
[6130704.521785] [<ffffffff810e68ec>] generic_sync_sb_inodes+0x36c/0x440
[6130704.521789] [<ffffffff810e6b8e>] writeback_inodes+0x5e/0x100
[6130704.521792] [<ffffffff8109d4ac>] wb_kupdate+0xbc/0x140
[6130704.521796] [<ffffffff8109e6a8>] pdflush+0x118/0x220
[6130704.521799] [<ffffffff8109d3f0>] ? wb_kupdate+0x0/0x140
[6130704.521802] [<ffffffff8109e590>] ? pdflush+0x0/0x220
[6130704.521806] [<ffffffff8105b4c6>] kthread+0x56/0x90
[6130704.521811] [<ffffffff8100cf6a>] child_rip+0xa/0x20
[6130704.521814] [<ffffffff8100c969>] ? restore_args+0x0/0x30
[6130704.521818] [<ffffffff8105b470>] ? kthread+0x0/0x90
[6130704.521821] [<ffffffff8100cf60>] ? child_rip+0x0/0x20
[6130704.521826] kjournald2 D ffff88021f921e28 0 1334 2
[6130704.521830] ffff88021f921d10 0000000000000046 ffff88021f48c890
0000000000000000
[6130704.521835] 0000000000010e80 000000000000c748 ffff88021e5d8000
ffff88021f844740
[6130704.521839] ffff88021e5d8370 0000000100000282 0000000000000000
0000000000000282
[6130704.521844] Call Trace:
[6130704.521847] [<ffffffff813a9639>] schedule+0x9/0x20
[6130704.521853] [<ffffffff81178ebe>]
jbd2_journal_commit_transaction+0x1be/0x1810
[6130704.521856] [<ffffffff81040cd6>] ? dequeue_task_fair+0x256/0x260
[6130704.521860] [<ffffffff8103d91b>] ? finish_task_switch+0x5b/0xd0
[6130704.521864] [<ffffffff8105b900>] ? autoremove_wake_function+0x0/0x40
[6130704.521868] [<ffffffff8117ea8a>] kjournald2+0x11a/0x370
[6130704.521872] [<ffffffff8105b900>] ? autoremove_wake_function+0x0/0x40
[6130704.521875] [<ffffffff8117e970>] ? kjournald2+0x0/0x370
[6130704.521878] [<ffffffff8117e970>] ? kjournald2+0x0/0x370
[6130704.521881] [<ffffffff8105b4c6>] kthread+0x56/0x90
[6130704.521885] [<ffffffff8100cf6a>] child_rip+0xa/0x20
[6130704.521888] [<ffffffff8100c969>] ? restore_args+0x0/0x30
[6130704.521892] [<ffffffff8105b470>] ? kthread+0x0/0x90
[6130704.521895] [<ffffffff8100cf60>] ? child_rip+0x0/0x20
[6130704.521901] receptd D 000000000000002a 0 28746 2063
[6130704.521905] ffff8801d1b39c78 0000000000000082 ffff8801d1b39be8
ffffffff81152dd3
[6130704.521910] 0000000000010e80 000000000000c748 ffff88010014ce60
ffffffff81526360
[6130704.521914] ffff88010014d1d0 00000000810db183 000000025821c45c
0000000000000286
[6130704.521919] Call Trace:
[6130704.521922] [<ffffffff81152dd3>] ? dx_release+0x23/0x50
[6130704.521926] [<ffffffff813a9639>] schedule+0x9/0x20
[6130704.521930] [<ffffffff81177ea5>] start_this_handle+0x365/0x5d0
[6130704.521934] [<ffffffff8105b900>] ? autoremove_wake_function+0x0/0x40
[6130704.521937] [<ffffffff81178306>] jbd2_journal_start+0xa6/0xf0
[6130704.521942] [<ffffffff811593c5>] ext4_journal_start_sb+0x55/0x90
[6130704.521945] [<ffffffff81155441>] ext4_create+0x81/0x130
[6130704.521949] [<ffffffff810d23aa>] vfs_create+0x9a/0xb0
[6130704.521952] [<ffffffff810d522e>] do_filp_open+0x85e/0x990
[6130704.521956] [<ffffffff810d1d16>] ? getname+0x36/0x200
[6130704.521960] [<ffffffff810deada>] ? alloc_fd+0x4a/0x140
[6130704.521964] [<ffffffff810c5dfb>] do_sys_open+0x7b/0x110
[6130704.521967] [<ffffffff810c5ebb>] sys_open+0x1b/0x20
[6130704.521971] [<ffffffff8100bfab>] system_call_fastpath+0x16/0x1b
[6130704.521973] receptd D 000000000000002a 0 10643 2063
[6130704.521977] ffff8800155e9c78 0000000000000082 ffff8800155e9be8
ffffffff81152dd3
[6130704.521982] 0000000000010e80 000000000000c748 ffff880100149560
ffffffff81526360
[6130704.521986] ffff8801001498d0 00000000810db183 000000025adbe421
0000000000000286
[6130704.521991] Call Trace:
[6130704.521994] [<ffffffff81152dd3>] ? dx_release+0x23/0x50
[6130704.521998] [<ffffffff813a9639>] schedule+0x9/0x20
[6130704.522002] [<ffffffff81177ea5>] start_this_handle+0x365/0x5d0
[6130704.522005] [<ffffffff8105b900>] ? autoremove_wake_function+0x0/0x40
[6130704.522009] [<ffffffff81178306>] jbd2_journal_start+0xa6/0xf0
[6130704.522013] [<ffffffff811593c5>] ext4_journal_start_sb+0x55/0x90
[6130704.522016] [<ffffffff81155441>] ext4_create+0x81/0x130
[6130704.522020] [<ffffffff810d23aa>] vfs_create+0x9a/0xb0
[6130704.522023] [<ffffffff810d522e>] do_filp_open+0x85e/0x990
[6130704.522027] [<ffffffff810d1d16>] ? getname+0x36/0x200
[6130704.522030] [<ffffffff810deada>] ? alloc_fd+0x4a/0x140
[6130704.522033] [<ffffffff810c5dfb>] do_sys_open+0x7b/0x110
[6130704.522037] [<ffffffff810c5ebb>] sys_open+0x1b/0x20
[6130704.522040] [<ffffffff8100bfab>] system_call_fastpath+0x16/0x1b
[6130704.522043] receptd D 000000000000002a 0 3658 2063
[6130704.522047] ffff8801792adc78 0000000000000082 ffff8801792adbe8
ffffffff81152dd3
[6130704.522051] 0000000000010e80 000000000000c748 ffff88010014b900
ffffffff81526360
[6130704.522056] ffff88010014bc70 00000000810db183 000000025ddc053f
0000000000000286
[6130704.522060] Call Trace:
[6130704.522063] [<ffffffff81152dd3>] ? dx_release+0x23/0x50
[6130704.522067] [<ffffffff813a9639>] schedule+0x9/0x20
[6130704.522071] [<ffffffff81177ea5>] start_this_handle+0x365/0x5d0
[6130704.522075] [<ffffffff8105b900>] ? autoremove_wake_function+0x0/0x40
[6130704.522079] [<ffffffff81178306>] jbd2_journal_start+0xa6/0xf0
[6130704.522083] [<ffffffff811593c5>] ext4_journal_start_sb+0x55/0x90
[6130704.522086] [<ffffffff81155441>] ext4_create+0x81/0x130
[6130704.522089] [<ffffffff810d23aa>] vfs_create+0x9a/0xb0
[6130704.522093] [<ffffffff810d522e>] do_filp_open+0x85e/0x990
[6130704.522096] [<ffffffff810d1d16>] ? getname+0x36/0x200
[6130704.522099] [<ffffffff810deada>] ? alloc_fd+0x4a/0x140
[6130704.522103] [<ffffffff810c5dfb>] do_sys_open+0x7b/0x110
[6130704.522106] [<ffffffff810c5ebb>] sys_open+0x1b/0x20
[6130704.522109] [<ffffffff8100bfab>] system_call_fastpath+0x16/0x1b
[6130704.522112] receptd D ffff8801f4d04ba4 0 4716 2063
[6130704.522116] ffff880001f43e58 0000000000000082 ffffffff81095e00
ffff880001f43de8
[6130704.522120] 0000000000010e80 000000000000c748 ffff880100149c80
ffffffff81526360
[6130704.522125] ffff880100149ff0 0000000000060d51 000000025fd791a8
0000000000060d51
[6130704.522128] Call Trace:
[6130704.522128] [<ffffffff81095e00>] ? sync_page+0x0/0x60
[6130704.522128] [<ffffffff810b9c48>] ? delete_from_swap_cache+0x48/0x60
[6130704.522128] [<ffffffff810ba70b>] ? swap_info_get+0x6b/0xf0
[6130704.522128] [<ffffffff813a9d7b>]
__mutex_lock_killable_slowpath+0xeb/0x1c0
[6130704.522128] [<ffffffff810d6c90>] ? filldir+0x0/0xe0
[6130704.522128] [<ffffffff813a9ea8>] mutex_lock_killable+0x58/0x70
[6130704.522128] [<ffffffff810d6ed2>] vfs_readdir+0x72/0xc0
[6130704.522128] [<ffffffff810d707b>] sys_getdents+0x8b/0xf0
[6130704.522128] [<ffffffff8100bfab>] system_call_fastpath+0x16/0x1b
[6130704.522128] receptd D ffff8801f4d04ba4 0 18596 2063
[6130704.522128] ffff88015a003e58 0000000000000082 ffff88021c9cb540
000000012905b025
[6130704.522128] 0000000000010e80 000000000000c748 ffff8801fb166ae0
ffff88021f843900
[6130704.522128] ffff8801fb166e50 0000000101c0ba80 000000026291bdc0
ffffe20006bcac40
[6130704.522128] Call Trace:
[6130704.522128] [<ffffffff813a9d7b>]
__mutex_lock_killable_slowpath+0xeb/0x1c0
[6130704.522128] [<ffffffff810d6c90>] ? filldir+0x0/0xe0
[6130704.522128] [<ffffffff813a9ea8>] mutex_lock_killable+0x58/0x70
[6130704.522128] [<ffffffff810d6ed2>] vfs_readdir+0x72/0xc0
[6130704.522128] [<ffffffff810d707b>] sys_getdents+0x8b/0xf0
[6130704.522128] [<ffffffff8100bfab>] system_call_fastpath+0x16/0x1b
[6130704.522128] receptd D ffff8801f4d04ba4 0 569 2063
[6130704.522128] ffff8801c5705e58 0000000000000082 0000000000000000
ffff88021e7a1150
[6130704.522128] 0000000000010e80 000000000000c748 ffff8801fb161560
ffffffff81526360
[6130704.522128] ffff8801fb1618d0 0000000081580a80 00000002654bd5e6
0000000000000001
[6130704.522128] Call Trace:
[6130704.522128] [<ffffffff810b68b4>] ? anon_vma_prepare+0x34/0xf0
[6130704.522128] [<ffffffff813a9d7b>]
__mutex_lock_killable_slowpath+0xeb/0x1c0
[6130704.522128] [<ffffffff810d6c90>] ? filldir+0x0/0xe0
[6130704.522128] [<ffffffff813a9ea8>] mutex_lock_killable+0x58/0x70
[6130704.522128] [<ffffffff810d6ed2>] vfs_readdir+0x72/0xc0
[6130704.522128] [<ffffffff810d707b>] sys_getdents+0x8b/0xf0
[6130704.522128] [<ffffffff8100bfab>] system_call_fastpath+0x16/0x1b
[6130704.522128] receptd D ffff8801f4d04ba4 0 15225 2063
[6130704.522128] ffff880013545e58 0000000000000082 0000000000000000
ffff88021e7a1150
[6130704.522128] 0000000000010e80 000000000000c748 ffff8801fb165ca0
ffffffff81526360
[6130704.522128] ffff8801fb166010 0000000081580a80 000000026805edc6
0000000000000001
[6130704.522128] Call Trace:
[6130704.522128] [<ffffffff810b68b4>] ? anon_vma_prepare+0x34/0xf0
[6130704.522128] [<ffffffff813a9d7b>]
__mutex_lock_killable_slowpath+0xeb/0x1c0
[6130704.522128] [<ffffffff810d6c90>] ? filldir+0x0/0xe0
[6130704.522128] [<ffffffff813a9ea8>] mutex_lock_killable+0x58/0x70
[6130704.522128] [<ffffffff810d6ed2>] vfs_readdir+0x72/0xc0
[6130704.522128] [<ffffffff810d707b>] sys_getdents+0x8b/0xf0
[6130704.522128] [<ffffffff8100bfab>] system_call_fastpath+0x16/0x1b
[6130704.522128] receptd D ffff8801f4d04ba4 0 29613 2063
[6130704.522128] ffff88004071de58 0000000000000082 0000000000000000
ffff88021e7a1150
[6130704.522128] 0000000000010e80 000000000000c748 ffff8801fb1663c0
ffffffff81526360
[6130704.522128] ffff8801fb166730 0000000081580a80 000000026ac00606
0000000000000001
[6130704.522128] Call Trace:
[6130704.522128] [<ffffffff810b68b4>] ? anon_vma_prepare+0x34/0xf0
[6130704.522128] [<ffffffff813a9d7b>]
__mutex_lock_killable_slowpath+0xeb/0x1c0
[6130704.522128] [<ffffffff810d6c90>] ? filldir+0x0/0xe0
[6130704.522128] [<ffffffff813a9ea8>] mutex_lock_killable+0x58/0x70
[6130704.522128] [<ffffffff810d6ed2>] vfs_readdir+0x72/0xc0
[6130704.522128] [<ffffffff810d707b>] sys_getdents+0x8b/0xf0
[6130704.522128] [<ffffffff8100bfab>] system_call_fastpath+0x16/0x1b
[6130704.522128] receptd D ffff8801f4d04ba4 0 4444 2063
[6130704.522128] ffff8800404e5e58 0000000000000082 0000000000000000
ffff88021e7a1150
[6130704.522128] 0000000000010e80 000000000000c748 ffff880040494020
ffffffff81526360
[6130704.522128] ffff880040494390 0000000081580a80 000000026b2c0f52
0000000000000001
[6130704.522128] Call Trace:
[6130704.522128] [<ffffffff810b68b4>] ? anon_vma_prepare+0x34/0xf0
[6130704.522128] [<ffffffff813a9d7b>]
__mutex_lock_killable_slowpath+0xeb/0x1c0
[6130704.522128] [<ffffffff810d6c90>] ? filldir+0x0/0xe0
[6130704.522128] [<ffffffff813a9ea8>] mutex_lock_killable+0x58/0x70
[6130704.522128] [<ffffffff810d6ed2>] vfs_readdir+0x72/0xc0
[6130704.522128] [<ffffffff810d707b>] sys_getdents+0x8b/0xf0
[6130704.522128] [<ffffffff8100bfab>] system_call_fastpath+0x16/0x1b
[6130704.522128] drdbmake D ffff88021e4c7800 0 27019 13796
[6130704.522128] ffff8801d1bcda88 0000000000000082 ffff8801f4ce9bf0
ffff8801678b1380
[6130704.522128] 0000000000010e80 000000000000c748 ffff8800404963c0
ffffffff81526360
[6130704.522128] ffff880040496730 00000000f4ce9bf0 000000025819cebe
0000000000000282
[6130704.522128] Call Trace:
[6130704.522128] [<ffffffff813a9639>] schedule+0x9/0x20
[6130704.522128] [<ffffffff81177ea5>] start_this_handle+0x365/0x5d0
[6130704.522128] [<ffffffff8105b900>] ? autoremove_wake_function+0x0/0x40
[6130704.522128] [<ffffffff811781ce>] jbd2_journal_restart+0xbe/0x150
[6130704.522128] [<ffffffff8116243d>] ext4_ext_truncate+0x6dd/0xa20
[6130704.522128] [<ffffffff81095b3b>] ? find_get_pages+0x3b/0xf0
[6130704.522128] [<ffffffff81150a78>] ext4_truncate+0x198/0x680
[6130704.522128] [<ffffffff810ac984>] ? unmap_mapping_range+0x74/0x280
[6130704.522128] [<ffffffff811772c0>] ? jbd2_journal_stop+0x1e0/0x360
[6130704.522128] [<ffffffff810acd25>] vmtruncate+0xa5/0x110
[6130704.522128] [<ffffffff810dda10>] inode_setattr+0x30/0x180
[6130704.522128] [<ffffffff8114d073>] ext4_setattr+0x173/0x310
[6130704.522128] [<ffffffff810ddc79>] notify_change+0x119/0x330
[6130704.522128] [<ffffffff810c6df3>] do_truncate+0x63/0x90
[6130704.522128] [<ffffffff810d0cc3>] ? get_write_access+0x23/0x60
[6130704.522128] [<ffffffff810c70cb>] sys_truncate+0x17b/0x180
[6130704.522128] [<ffffffff8100bfab>] system_call_fastpath+0x16/0x1b
[6130704.522128] nodeserv D ffff88021eaedca8 0 17888 13796
[6130704.522128] ffff88021eaedbf8 0000000000000082 ffff8800280261e8
ffff88021e5b56e0
[6130704.522128] 0000000000010e80 000000000000c748 ffff880100148e40
ffffffff81526360
[6130704.522128] ffff8801001491b0 000000008119bd17 000000026d668c1b
0000000000000002
[6130704.522128] Call Trace:
[6130704.522128] [<ffffffffa0039291>] ? raid0_unplug+0x51/0x70 [raid0]
[6130704.522128] [<ffffffff813a9639>] schedule+0x9/0x20
[6130704.522128] [<ffffffff813a9687>] io_schedule+0x37/0x50
[6130704.522128] [<ffffffff81095e35>] sync_page+0x35/0x60
[6130704.522128] [<ffffffff81095e69>] sync_page_killable+0x9/0x50
[6130704.522128] [<ffffffff813a99d2>] __wait_on_bit_lock+0x52/0xb0
[6130704.522128] [<ffffffff81095e60>] ? sync_page_killable+0x0/0x50
[6130704.522128] [<ffffffff81095d74>] __lock_page_killable+0x64/0x70
[6130704.522128] [<ffffffff8105b940>] ? wake_bit_function+0x0/0x40
[6130704.522128] [<ffffffff81095c0b>] ? find_get_page+0x1b/0xb0
[6130704.522128] [<ffffffff81097908>] generic_file_aio_read+0x3b8/0x6b0
[6130704.522128] [<ffffffff810c7dc1>] do_sync_read+0xf1/0x140
[6130704.522128] [<ffffffff8106a5e8>] ? do_futex+0xb8/0xb20
[6130704.522128] [<ffffffff813ab78f>] ? _spin_unlock_irqrestore+0x2f/0x40
[6130704.522128] [<ffffffff8105b900>] ? autoremove_wake_function+0x0/0x40
[6130704.522128] [<ffffffff8105bc73>] ? add_wait_queue+0x43/0x60
[6130704.522128] [<ffffffff81062a6c>] ? getnstimeofday+0x5c/0xf0
[6130704.522128] [<ffffffff8105f049>] ? ktime_get_ts+0x59/0x60
[6130704.522128] [<ffffffff810c85b8>] vfs_read+0xc8/0x170
[6130704.522128] [<ffffffff810c86fa>] sys_pread64+0x9a/0xa0
[6130704.522128] [<ffffffff8100bfab>] system_call_fastpath+0x16/0x1b
[6130704.522128] Sched Debug Version: v0.09, 2.6.30.4 #1
[6130704.522128] now at 6130704522.576956 msecs
[6130704.522128] .jiffies : 10425371817
[6130704.522128] .sysctl_sched_latency : 40.000000
[6130704.522128] .sysctl_sched_min_granularity : 8.000000
[6130704.522128] .sysctl_sched_wakeup_granularity : 10.000000
[6130704.522128] .sysctl_sched_child_runs_first : 0.000001
[6130704.522128] .sysctl_sched_features : 113917
[6130704.522128]
[6130704.522128] cpu#0, 1866.760 MHz
[6130704.522128] .nr_running : 0
[6130704.522128] .load : 0
[6130704.522128] .nr_switches : 1088197559
[6130704.522128] .nr_load_updates : 1494088224
[6130704.522128] .nr_uninterruptible : -10143689
[6130704.522128] .next_balance : 10425.371927
[6130704.522128] .curr->pid : 0
[6130704.522128] .clock : 6130704522.001795
[6130704.522128] .cpu_load[0] : 0
[6130704.522128] .cpu_load[1] : 732
[6130704.522128] .cpu_load[2] : 1307
[6130704.522128] .cpu_load[3] : 1628
[6130704.522128] .cpu_load[4] : 2055
[6130704.522128] .yld_count : 62066
[6130704.522128] .sched_switch : 0
[6130704.522128] .sched_count : 1162815210
[6130704.522128] .sched_goidle : 486300434
[6130704.522128] .ttwu_count : 639575934
[6130704.522128] .ttwu_local : 567060963
[6130704.522128] .bkl_count : 643
[6130704.522128]
[6130704.522128] cfs_rq[0]:
[6130704.522128] .exec_clock : 1105652808.029192
[6130704.522128] .MIN_vruntime : 0.000001
[6130704.522128] .min_vruntime : 7063664391.526226
[6130704.522128] .max_vruntime : 0.000001
[6130704.522128] .spread : 0.000000
[6130704.522128] .spread0 : 0.000000
[6130704.522128] .nr_running : 0
[6130704.522128] .load : 0
[6130704.522128] .nr_spread_over : 8978
[6130704.522128]
[6130704.522128] rt_rq[0]:
[6130704.522128] .rt_nr_running : 0
[6130704.522128] .rt_throttled : 0
[6130704.522128] .rt_time : 0.000000
[6130704.522128] .rt_runtime : 950.000000
[6130704.522128]
[6130704.522128] runnable tasks:
[6130704.522128] task PID tree-key switches
prio exec-runtime sum-exec sum-sleep
[6130704.522128]
----------------------------------------------------------------------------------------------------------
[6130704.522128]
[6130704.522128] cpu#1, 1866.760 MHz
[6130704.522128] .nr_running : 1
[6130704.522128] .load : 1024
[6130704.522128] .nr_switches : 818082742
[6130704.522128] .nr_load_updates : 1586872071
[6130704.522128] .nr_uninterruptible : 10143702
[6130704.522128] .next_balance : 10425.371857
[6130704.522128] .curr->pid : 11137
[6130704.522128] .clock : 6130704521.459918
[6130704.522128] .cpu_load[0] : 1024
[6130704.522128] .cpu_load[1] : 514
[6130704.522128] .cpu_load[2] : 318
[6130704.522128] .cpu_load[3] : 299
[6130704.522128] .cpu_load[4] : 261
[6130704.522128] .yld_count : 283011
[6130704.522128] .sched_switch : 0
[6130704.522128] .sched_count : 947252346
[6130704.522128] .sched_goidle : 479113257
[6130704.522128] .ttwu_count : 422473135
[6130704.522128] .ttwu_local : 316765436
[6130704.522128] .bkl_count : 10
[6130704.522128]
[6130704.522128] cfs_rq[1]:
[6130704.522128] .exec_clock : 478641403.088793
[6130704.522128] .MIN_vruntime : 0.000001
[6130704.522128] .min_vruntime : 8051549362.514115
[6130704.522128] .max_vruntime : 0.000001
[6130704.522128] .spread : 0.000000
[6130704.522128] .spread0 : 987884970.987889
[6130704.522128] .nr_running : 1
[6130704.522128] .load : 1024
[6130704.522128] .nr_spread_over : 11703
[6130704.522128]
[6130704.522128] rt_rq[1]:
[6130704.522128] .rt_nr_running : 0
[6130704.522128] .rt_throttled : 0
[6130704.522128] .rt_time : 0.000000
[6130704.522128] .rt_runtime : 950.000000
[6130704.522128]
[6130704.522128] runnable tasks:
[6130704.522128] task PID tree-key switches
prio exec-runtime sum-exec sum-sleep
[6130704.522128]
----------------------------------------------------------------------------------------------------------
[6130704.522128] R bash 11137 8051549322.514115 272
120 8051549322.514115 35.937180 689280132.211960
[6130704.522128]
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http://bugzilla.kernel.org/show_bug.cgi?id=14452
Fredrik Andersson <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected]
Platform|All |x86-64
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Jan Kara <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected]
--- Comment #1 from Jan Kara <[email protected]> 2009-11-05 14:22:32 ---
This looks like a deadlock that was fixed by commit
487caeef9fc08c0565e082c40a8aaf58dad92bbb. The fix went into vanilla kernel
shortly after 2.6.31 was released so you shouldn't see this deadlock anymore
with 2.6.32. I'll attach the patch here for reference if you want to test it by
itself.
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--- Comment #2 from Jan Kara <[email protected]> 2009-11-05 14:23:12 ---
Created an attachment (id=23663)
--> (http://bugzilla.kernel.org/attachment.cgi?id=23663)
Patch fixing deadlock in ext4 truncation code
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--- Comment #3 from Jan Kara <[email protected]> 2009-11-05 14:23:53 ---
Does this patch fix your problem?
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--- Comment #4 from Anonymous Emailer <[email protected]> 2009-11-05 14:35:18 ---
Reply-To: [email protected]
Thank you for this information.
I will upgrade to .32 as soon as it is available and get back to the
list if it doesn't help the problem.
I may patch the kernel too before this if I get the time.
/Fredrik
On Thu, Nov 5, 2009 at 3:22 PM, <[email protected]> wrote:
> http://bugzilla.kernel.org/show_bug.cgi?id=14452
>
>
> Jan Kara <[email protected]> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |[email protected]
>
>
>
>
> --- Comment #1 from Jan Kara <[email protected]> 2009-11-05 14:22:32 ---
> This looks like a deadlock that was fixed by commit
> 487caeef9fc08c0565e082c40a8aaf58dad92bbb. The fix went into vanilla kernel
> shortly after 2.6.31 was released so you shouldn't see this deadlock anymore
> with 2.6.32. I'll attach the patch here for reference if you want to test it by
> itself.
>
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Jan Kara <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|[email protected] |[email protected]
|g |
--- Comment #5 from Jan Kara <[email protected]> 2009-11-18 09:54:42 ---
No, reply for two weeks. Assuming the things got fixed. Closing the bug.
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