[mythtv-users] Kernel errors

Tue Apr 17 03:36:22 UTC 2012

My mythbackend computer locked up today, the whole computer, not just
mythbackend.  Following is the syslog at the time this happened.  It's been
rock steady for months, and I haven't made any changes lately.  I rebooted
and now it seems to be functioning normally.

Any suggestions for what I should do?  Is this a sign of disk errors?

Thanks,
Jerry

Version info:

MythTV Version   : v0.24.1-45-g254c9f7
MythTV Branch    : fixes/0.24
Network Protocol : 63
Library API      : 0.24.20110505-1
QT Version       : 4.7.2
Options compiled in:
 linux debug using_alsa using_oss using_pulse using_pulseoutput
using_backend using_bindings_perl using_bindings_python using_dvb
using_firewire using_frontend using_hdhomerun using_hdpvr using_iptv
using_ivtv using_joystick_menu using_lirc using_mheg using_opengl_video
using_opengl_vsync using_qtdbus using_qtwebkit using_v4l using_x11
using_xrandr using_xv using_bindings_perl using_bindings_python
using_mythtranscode using_opengl using_vdpau using_ffmpeg_threads
using_live using_mheg

syslog:

Apr 16 22:30:23 kenny kernel: [270720.200044] INFO: task mythbackend:17865
blocked for more than 120 seconds.
Apr 16 22:30:23 kenny kernel: [270720.200048] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this mess
age.
Apr 16 22:30:23 kenny kernel: [270720.200051] mythbackend     D
0000000000000000     0 17865   1410 0x00000000
Apr 16 22:30:23 kenny kernel: [270720.200055]  ffff880002d4aef8
0000000000000086 ffff880002d4bfd8 ffff880002d4a000
Apr 16 22:30:23 kenny kernel: [270720.200059]  0000000000013d00
ffff880016999a98 ffff880002d4bfd8 0000000000013d00
Apr 16 22:30:23 kenny kernel: [270720.200063]  ffff880019350000
ffff8800169996e0 ffff88003a0026c0 ffff8800169996e0
Apr 16 22:30:23 kenny kernel: [270720.200067] Call Trace:
Apr 16 22:30:23 kenny kernel: [270720.200075]  [<ffffffff815c2e7d>]
rwsem_down_failed_common+0xcd/0x170
Apr 16 22:30:23 kenny kernel: [270720.200080]  [<ffffffff815c2f33>]
rwsem_down_write_failed+0x13/0x20
Apr 16 22:30:23 kenny kernel: [270720.200084]  [<ffffffff812e69e3>]
call_rwsem_down_write_failed+0x13/0x20
Apr 16 22:30:23 kenny kernel: [270720.200088]  [<ffffffff815c2232>] ?
down_write+0x32/0x40
Apr 16 22:30:23 kenny kernel: [270720.200098]  [<ffffffffa0bd1821>]
jfs_get_block+0x51/0x220 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200103]  [<ffffffff81193565>]
__block_write_full_page+0x105/0x3a0
Apr 16 22:30:23 kenny kernel: [270720.200106]  [<ffffffff81192760>] ?
end_buffer_async_write+0x0/0x170
Apr 16 22:30:23 kenny kernel: [270720.200111]  [<ffffffffa0bd17d0>] ?
jfs_get_block+0x0/0x220 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200116]  [<ffffffffa0bd17d0>] ?
jfs_get_block+0x0/0x220 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200119]  [<ffffffff81194513>]
block_write_full_page_endio+0xe3/0x120
Apr 16 22:30:23 kenny kernel: [270720.200122]  [<ffffffff81194565>]
block_write_full_page+0x15/0x20
Apr 16 22:30:23 kenny kernel: [270720.200127]  [<ffffffffa0bd17c8>]
jfs_writepage+0x18/0x20 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200131]  [<ffffffff811594a7>]
fallback_migrate_page+0xc7/0x130
Apr 16 22:30:23 kenny kernel: [270720.200135]  [<ffffffff81159613>]
move_to_new_page+0x103/0x120
Apr 16 22:30:23 kenny kernel: [270720.200138]  [<ffffffff81159ac6>]
unmap_and_move+0x2f6/0x350
Apr 16 22:30:23 kenny kernel: [270720.200142]  [<ffffffff8114e7d0>] ?
compaction_alloc+0x0/0x70
Apr 16 22:30:23 kenny kernel: [270720.200146]  [<ffffffff81159d12>]
migrate_pages+0xa2/0x150
Apr 16 22:30:23 kenny kernel: [270720.200149]  [<ffffffff8114e9a4>]
compact_zone+0xa4/0x220
Apr 16 22:30:23 kenny kernel: [270720.200153]  [<ffffffff8114ecec>]
compact_zone_order+0xac/0xf0
Apr 16 22:30:23 kenny kernel: [270720.200156]  [<ffffffff8105f464>] ?
try_to_wake_up+0x244/0x3e0
Apr 16 22:30:23 kenny kernel: [270720.200160]  [<ffffffff8114edfd>]
try_to_compact_pages+0xcd/0x100
Apr 16 22:30:23 kenny kernel: [270720.200164]  [<ffffffff8111413f>]
__alloc_pages_direct_compact+0xcf/0x190
Apr 16 22:30:23 kenny kernel: [270720.200167]  [<ffffffff8111463d>]
__alloc_pages_nodemask+0x43d/0x840
Apr 16 22:30:23 kenny kernel: [270720.200171]  [<ffffffff81149f65>]
alloc_pages_current+0xa5/0x110
Apr 16 22:30:23 kenny kernel: [270720.200174]  [<ffffffff811536b5>]
new_slab+0x1f5/0x290
Apr 16 22:30:23 kenny kernel: [270720.200177]  [<ffffffff81155152>]
__slab_alloc+0x1b2/0x390
Apr 16 22:30:23 kenny kernel: [270720.200180]  [<ffffffff812dfc79>] ?
radix_tree_preload+0x39/0xa0
Apr 16 22:30:23 kenny kernel: [270720.200183]  [<ffffffff812dfc79>] ?
radix_tree_preload+0x39/0xa0
Apr 16 22:30:23 kenny kernel: [270720.200186]  [<ffffffff81155b25>]
kmem_cache_alloc+0x115/0x120
Apr 16 22:30:23 kenny kernel: [270720.200189]  [<ffffffff812dfc79>]
radix_tree_preload+0x39/0xa0
Apr 16 22:30:23 kenny kernel: [270720.200194]  [<ffffffff8110ca2b>]
add_to_page_cache_locked+0x7b/0x160
Apr 16 22:30:23 kenny kernel: [270720.200197]  [<ffffffff8110cb3c>]
add_to_page_cache_lru+0x2c/0x80
Apr 16 22:30:23 kenny kernel: [270720.200200]  [<ffffffff8110c8be>] ?
find_get_page+0x1e/0x90
Apr 16 22:30:23 kenny kernel: [270720.200204]  [<ffffffff8110ccba>]
do_read_cache_page+0x6a/0x180
Apr 16 22:30:23 kenny kernel: [270720.200210]  [<ffffffffa0be9990>] ?
metapage_readpage+0x0/0x190 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200213]  [<ffffffff8110ce19>]
read_cache_page_async+0x19/0x20
Apr 16 22:30:23 kenny kernel: [270720.200217]  [<ffffffff8110ce2e>]
read_cache_page+0xe/0x20
Apr 16 22:30:23 kenny kernel: [270720.200222]  [<ffffffffa0bea224>]
__get_metapage+0x94/0x5d0 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200228]  [<ffffffffa0bdfd06>]
dbAllocCtl+0x2a6/0x310 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200233]  [<ffffffffa0be007e>]
dbAllocAG+0x30e/0x3b0 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200239]  [<ffffffffa0be0e99>]
dbAlloc+0xe9/0x470 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200242]  [<ffffffff81114325>] ?
__alloc_pages_nodemask+0x125/0x840
Apr 16 22:30:23 kenny kernel: [270720.200248]  [<ffffffffa0be8db2>]
extBalloc+0x82/0x1c0 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200253]  [<ffffffffa0be8fd4>]
extAlloc+0xe4/0x300 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200258]  [<ffffffffa0bd199c>]
jfs_get_block+0x1cc/0x220 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200263]  [<ffffffff81191713>] ?
alloc_buffer_head+0x43/0x50
Apr 16 22:30:23 kenny kernel: [270720.200266]  [<ffffffff811953da>]
nobh_write_begin+0x1ca/0x460
Apr 16 22:30:23 kenny kernel: [270720.200271]  [<ffffffffa0bd1716>]
jfs_write_begin+0x46/0x80 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200276]  [<ffffffffa0bd17d0>] ?
jfs_get_block+0x0/0x220 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200279]  [<ffffffff8110b902>]
generic_perform_write+0xc2/0x1d0
Apr 16 22:30:23 kenny kernel: [270720.200283]  [<ffffffff8110ba6e>]
generic_file_buffered_write+0x5e/0x90
Apr 16 22:30:23 kenny kernel: [270720.200287]  [<ffffffff8110d9f9>]
__generic_file_aio_write+0x229/0x440
Apr 16 22:30:23 kenny kernel: [270720.200291]  [<ffffffff8109b374>] ?
futex_wait+0x204/0x300
Apr 16 22:30:23 kenny kernel: [270720.200294]  [<ffffffff8110dc76>]
generic_file_aio_write+0x66/0xd0
Apr 16 22:30:23 kenny kernel: [270720.200298]  [<ffffffff811646a2>]
do_sync_write+0xd2/0x110
Apr 16 22:30:23 kenny kernel: [270720.200301]  [<ffffffff8109a02a>] ?
get_futex_key+0x15a/0x1d0
Apr 16 22:30:23 kenny kernel: [270720.200307]  [<ffffffff812ae868>] ?
apparmor_file_permission+0x18/0x20
Apr 16 22:30:23 kenny kernel: [270720.200311]  [<ffffffff81279c3c>] ?
security_file_permission+0x2c/0xb0
Apr 16 22:30:23 kenny kernel: [270720.200314]  [<ffffffff81164ad1>] ?
rw_verify_area+0x61/0xf0
Apr 16 22:30:23 kenny kernel: [270720.200317]  [<ffffffff81164e16>]
vfs_write+0xc6/0x180
Apr 16 22:30:23 kenny kernel: [270720.200320]  [<ffffffff81165131>]
sys_write+0x51/0x90
Apr 16 22:30:23 kenny kernel: [270720.200324]  [<ffffffff8100c002>]
system_call_fastpath+0x16/0x1b
Apr 16 22:30:23 kenny kernel: [270720.200327] INFO: task mythbackend:17866
blocked for more than 120 seconds.
Apr 16 22:30:23 kenny kernel: [270720.200329] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 16 22:30:23 kenny kernel: [270720.200331] mythbackend     D
0000000000000000     0 17866   1410 0x00000000
Apr 16 22:30:23 kenny kernel: [270720.200335]  ffff880002d3fa28
0000000000000086 ffff880002d3ffd8 ffff880002d3e000
Apr 16 22:30:23 kenny kernel: [270720.200338]  0000000000013d00
ffff8800373e03b8 ffff880002d3ffd8 0000000000013d00
Apr 16 22:30:23 kenny kernel: [270720.200342]  ffffffff81a0b020
ffff8800373e0000 ffff880002d3fa58 ffff8800373e0000
Apr 16 22:30:23 kenny kernel: [270720.200345] Call Trace:
Apr 16 22:30:23 kenny kernel: [270720.200349]  [<ffffffff815c2e7d>]
rwsem_down_failed_common+0xcd/0x170
Apr 16 22:30:23 kenny kernel: [270720.200353]  [<ffffffff815c2f33>]
rwsem_down_write_failed+0x13/0x20
Apr 16 22:30:23 kenny kernel: [270720.200356]  [<ffffffff812e69e3>]
call_rwsem_down_write_failed+0x13/0x20
Apr 16 22:30:23 kenny kernel: [270720.200360]  [<ffffffff815c2232>] ?
down_write+0x32/0x40
Apr 16 22:30:23 kenny kernel: [270720.200365]  [<ffffffffa0bd1821>]
jfs_get_block+0x51/0x220 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200369]  [<ffffffff812c3431>] ?
__generic_unplug_device+0x21/0x40
Apr 16 22:30:23 kenny kernel: [270720.200373]  [<ffffffff8119c695>]
__mpage_writepage+0x455/0x660
Apr 16 22:30:23 kenny kernel: [270720.200388]  [<ffffffff812dfead>] ?
radix_tree_gang_lookup_tag_slot+0x8d/0xd0
Apr 16 22:30:23 kenny kernel: [270720.200392]  [<ffffffff8110c6b0>] ?
find_get_pages_tag+0x40/0x120
Apr 16 22:30:23 kenny kernel: [270720.200395]  [<ffffffff81115f2d>]
write_cache_pages+0x1ed/0x470
Apr 16 22:30:23 kenny kernel: [270720.200399]  [<ffffffff8119c240>] ?
__mpage_writepage+0x0/0x660
Apr 16 22:30:23 kenny kernel: [270720.200403]  [<ffffffff8119ba6d>]
mpage_writepages+0x3d/0x70
Apr 16 22:30:23 kenny kernel: [270720.200418]  [<ffffffffa0bd17d0>] ?
jfs_get_block+0x0/0x220 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200423]  [<ffffffffa0bd1785>]
jfs_writepages+0x15/0x20 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200426]  [<ffffffff81117191>]
do_writepages+0x21/0x40
Apr 16 22:30:23 kenny kernel: [270720.200430]  [<ffffffff8110d5bb>]
__filemap_fdatawrite_range+0x5b/0x60
Apr 16 22:30:23 kenny kernel: [270720.200433]  [<ffffffff8110d61a>]
filemap_write_and_wait_range+0x5a/0x80
Apr 16 22:30:23 kenny kernel: [270720.200437]  [<ffffffff8118fc7a>]
vfs_fsync_range+0x5a/0x90
Apr 16 22:30:23 kenny kernel: [270720.200440]  [<ffffffff8118fd1c>]
vfs_fsync+0x1c/0x20
Apr 16 22:30:23 kenny kernel: [270720.200444]  [<ffffffff8118fd5a>]
do_fsync+0x3a/0x60
Apr 16 22:30:23 kenny kernel: [270720.200447]  [<ffffffff8118fff3>]
sys_fdatasync+0x13/0x20
Apr 16 22:30:23 kenny kernel: [270720.200450]  [<ffffffff8100c002>]
system_call_fastpath+0x16/0x1b
Apr 16 22:30:23 kenny kernel: [270720.200453] INFO: task mythbackend:17869
blocked for more than 120 seconds.
Apr 16 22:30:23 kenny kernel: [270720.200455] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 16 22:30:23 kenny kernel: [270720.200457] mythbackend     D
0000000000000000     0 17869   1410 0x00000000
Apr 16 22:30:23 kenny kernel: [270720.200460]  ffff8800194f3820
0000000000000086 ffff8800194f3fd8 ffff8800194f2000
Apr 16 22:30:23 kenny kernel: [270720.200464]  0000000000013d00
ffff88001072b178 ffff8800194f3fd8 0000000000013d00
Apr 16 22:30:23 kenny kernel: [270720.200467]  ffff88000d0dadc0
ffff88001072adc0 ffffffff81114325 ffff88001072adc0
Apr 16 22:30:23 kenny kernel: [270720.200470] Call Trace:
Apr 16 22:30:23 kenny kernel: [270720.200473]  [<ffffffff81114325>] ?
__alloc_pages_nodemask+0x125/0x840
Apr 16 22:30:23 kenny kernel: [270720.200477]  [<ffffffff815c2e7d>]
rwsem_down_failed_common+0xcd/0x170
Apr 16 22:30:23 kenny kernel: [270720.200481]  [<ffffffff815c2f55>]
rwsem_down_read_failed+0x15/0x17
Apr 16 22:30:23 kenny kernel: [270720.200485]  [<ffffffff812e69b4>]
call_rwsem_down_read_failed+0x14/0x30
Apr 16 22:30:23 kenny kernel: [270720.200488]  [<ffffffff815c2264>] ?
down_read+0x24/0x30
Apr 16 22:30:23 kenny kernel: [270720.200494]  [<ffffffffa0be0f6b>]
dbAlloc+0x1bb/0x470 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200500]  [<ffffffffa0be8db2>]
extBalloc+0x82/0x1c0 [jfs]
Apr 16 22:30:23 kenny kernel: [270720.200505]  [<ffffffffa0be8fd4>]
extAlloc+0xe4/0x300 [jfs]

[more similar blocks repeated]
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