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authorMike Galbraith <mgalbraith@suse.de>2012-08-04 05:44:14 +0200
committerThomas Gleixner <tglx@linutronix.de>2012-08-13 18:41:55 +0200
commit8f6189684eb4e85e6c593cd710693f09c944450a (patch)
treea733526c634f4a7ea1366dc0da69371650c1d1d2 /kernel/Kconfig.preempt
parente221d028bb08b47e624c5f0a31732c642db9d19a (diff)
sched: Fix migration thread runtime bogosity
Make stop scheduler class do the same accounting as other classes, Migration threads can be caught in the act while doing exec balancing, leading to the below due to use of unmaintained ->se.exec_start. The load that triggered this particular instance was an apparently out of control heavily threaded application that does system monitoring in what equated to an exec bomb, with one of the VERY frequently migrated tasks being ps. %CPU PID USER CMD 99.3 45 root [migration/10] 97.7 53 root [migration/12] 97.0 57 root [migration/13] 90.1 49 root [migration/11] 89.6 65 root [migration/15] 88.7 17 root [migration/3] 80.4 37 root [migration/8] 78.1 41 root [migration/9] 44.2 13 root [migration/2] Signed-off-by: Mike Galbraith <mgalbraith@suse.de> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1344051854.6739.19.camel@marge.simpson.net Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/Kconfig.preempt')
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