See also Bug #517449
Linux sv28 2.6.26-2-amd64 #1 SMP Fri Mar 27 04:02:59 UTC 2009 x86_64
GNU/Linux
CPU0: Quad-Core AMD Opteron(tm) Processor 2372 HE stepping 02
Seemingly during the monthly mdadm re-sync ... And it started at the
time of normal system backups.
Here's the log snippet:
Aug 6 04:03:04 sv28 kernel: [1291504.252722] INFO: task
md1_resync:17780 blocked for more than 120 seconds.
Aug 6 04:04:30 sv28 kernel: [1291680.356669] INFO: task
md1_resync:17780 blocked for more than 120 seconds.
Aug 6 04:05:36 sv28 kernel: [1291814.493607] INFO: task
md1_resync:17780 blocked for more than 120 seconds.
Aug 6 04:07:08 sv28 kernel: [1291991.663419] INFO: task
md1_resync:17780 blocked for more than 120 seconds.
Aug 6 04:09:36 sv28 kernel: [1292301.987361] INFO: task
md1_resync:17780 blocked for more than 120 seconds.
Aug 6 04:12:30 sv28 kernel: [1292643.427055] INFO: task
md1_resync:17780 blocked for more than 120 seconds.
Aug 6 04:14:28 sv28 kernel: [1292773.345568] INFO: task kvm:4449
blocked for more than 120 seconds.
Aug 6 04:14:28 sv28 kernel: [1292773.345816] INFO: task kvm:4450
blocked for more than 120 seconds.
Aug 6 04:14:28 sv28 kernel: [1292773.346118] INFO: task kvm:4451
blocked for more than 120 seconds.
Aug 6 04:14:28 sv28 kernel: [1292773.349674] INFO: task
md1_resync:17780 blocked for more than 120 seconds.
Aug 6 04:14:28 sv28 kernel: [1292773.349674] INFO: task
md2_resync:17782 blocked for more than 120 seconds.
Aug 6 04:14:28 sv28 kernel: [1292773.349674] INFO: task partimage:18809
blocked for more than 120 seconds.
Aug 6 04:14:28 sv28 kernel: [1292773.349674] INFO: task pdflush:18830
blocked for more than 120 seconds.
I was able to recover the services with a reboot -nf - not ideal!
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