Article ID: 111896, created on Oct 4, 2011, last review on May 11, 2014

  • Applies to:
  • Virtuozzo containers for Linux 4.6
  • Virtuozzo containers for Linux 4.0

症状

Parallels Containers で、ネットワークファイルシステム(CIFS NFS など)の遅延マウントを復元できない場合があります。 このような障害は、以下のように /var/log/messages で原因を追求できます。

[ 1024.381688] DFS302: resuming daemon started
[ 1243.090701] INFO: task file_read:2511 blocked for more than 120 seconds.
[ 1243.090944] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1243.091160] file_read D ffff88000e96e040 0 2511 2510 0x00000080
[ 1243.091707] ffff88000be87d18 0000000000000082 ffff880015b01c00 00007f5e62f804e0
[ 1243.091985] 0000000000000008 00000000000000d4 00007f5e62f80000 ffffea000055ce00
[ 1243.092185] ffff88000e96e620 ffff88000be87fd8 000000000000f748 ffff88000e96e620
[ 1243.092532] Call Trace:
[ 1243.092845] [<ffffffff814bed95>] rwsem_down_failed_common+0x95/0x1d0
[ 1243.093079] [<ffffffff81058d20>] ? default_wake_function+0x0/0x20
[ 1243.093232] [<ffffffff814beef3>] rwsem_down_write_failed+0x23/0x30
[ 1243.093647] [<ffffffff812585b3>] call_rwsem_down_write_failed+0x13/0x20
[ 1243.093900] [<ffffffff814be3f2>] ? down_write+0x32/0x40
[ 1243.094049] [<ffffffffa04a88d2>] delay_switch_mm+0x22/0xd0 [vzrst]
[ 1243.094206] [<ffffffffa04a89d2>] delay_switch_current+0x52/0x60 [vzrst]
[ 1243.094389] [<ffffffffa04a8a71>] delayfs_wait_file+0x91/0x2c0 [vzrst]
[ 1243.094533] [<ffffffff814bdd1e>] ? mutex_lock+0x1e/0x50
[ 1243.094960] [<ffffffffa04a8d9e>] delay_llseek+0xe/0x20 [vzrst]
[ 1243.095113] [<ffffffff8117d19a>] vfs_llseek+0x3a/0x40
[ 1243.095242] [<ffffffff8117e926>] sys_lseek+0x66/0x80
[ 1243.095372] [<ffffffff8100b242>] system_call_fastpath+0x16/0x1b
[ 1243.095781] INFO: task file_read:2512 blocked for more than 120 seconds.
[ 1243.095991] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1243.096184] file_read D ffff88000be88bc0 0 2512 2510 0x00000080
[ 1243.096363] ffff88000be8bd18 0000000000000086 ffff880015b03c00 00007f5e62f804e0
[ 1243.096859] ffff880000000008 00000000000000d4 00007f5e62f80000 ffffea000055ce00
[ 1243.097071] ffff88000be891a0 ffff88000be8bfd8 000000000000f748 ffff88000be891a0
[ 1243.097273] Call Trace:
[ 1243.097340] [<ffffffff814bed95>] rwsem_down_failed_common+0x95/0x1d0
[ 1243.097543] [<ffffffff81058d20>] ? default_wake_function+0x0/0x20
[ 1243.097946] [<ffffffff814beef3>] rwsem_down_write_failed+0x23/0x30
[ 1243.098102] [<ffffffff812585b3>] call_rwsem_down_write_failed+0x13/0x20
[ 1243.098268] [<ffffffff814be3f2>] ? down_write+0x32/0x40
[ 1243.098406] [<ffffffffa04a88d2>] delay_switch_mm+0x22/0xd0 [vzrst]
[ 1243.098889] [<ffffffffa04a89d2>] delay_switch_current+0x52/0x60 [vzrst]
[ 1243.099065] [<ffffffffa04a8a71>] delayfs_wait_file+0x91/0x2c0 [vzrst]
[ 1243.099229] [<ffffffff814bdd1e>] ? mutex_lock+0x1e/0x50
[ 1243.099475] [<ffffffffa04a8d9e>] delay_llseek+0xe/0x20 [vzrst]
[ 1243.099627] [<ffffffff8117d19a>] vfs_llseek+0x3a/0x40
[ 1243.099923] [<ffffffff8117e926>] sys_lseek+0x66/0x80
[ 1243.100078] [<ffffffff8100b242>] system_call_fastpath+0x16/0x1b

解決策

該当するバグは Parallels Containers バージョン 4.7 で修正されました。この問題の解決には、このバージョンへのアップデートを検討してください。

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