Bug 63801 - System Hangs With Kernel Migration Processes Consuming 100% CPU
Summary: System Hangs With Kernel Migration Processes Consuming 100% CPU
Status: NEW
Alias: None
Product: Process Management
Classification: Unclassified
Component: Scheduler (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: Ingo Molnar
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-10-26 18:58 UTC by Andrew Piziali
Modified: 2017-08-23 04:14 UTC (History)
4 users (show)

See Also:
Kernel Version: 3.13-rc5
Subsystem:
Regression: No
Bisected commit-id:

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Description Andrew Piziali 2013-10-26 18:58:30 UTC 
Once or twice a week, the system becomes non-responsive, with the mouse cursor tracking mouse movement but no keyboard response. Until today I would resort to using the kernel magic keys to reboot the system (R-E-I-S-U-B). Today I remotely logged in from another machine on the LAN and discovered that not only was the kernel alive and all processes running, but that the "migration/0" and "migration/1" processes were consuming 50% of the CPU each, as reported by top(1). I suspect this is why the system becomes non-responsive.

Reference Ubuntu bug 1223055 (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1223055) for a log of diagnostics performed in an attempt to isolate this bug.
Comment 1 Alan 2013-11-13 11:56:27 UTC 
Does the box have encrypted swap ?
Comment 2 Andrew Piziali 2013-11-13 14:05:37 UTC 
No, it does not.
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