linux/kernel/sched/stop_task.c, branch v3.4.19Linux kernel source treehttps://git.amat.us/linux/atom/kernel/sched/stop_task.c?h=v3.4.192012-10-12T20:39:01Zsched: Fix migration thread runtime bogosity2012-10-12T20:39:01ZMike Galbraithmgalbraith@suse.de2012-08-04T03:44:14Zurn:sha1:93875bc33f71bf7a4851b44d387743866b13b130
commit 8f6189684eb4e85e6c593cd710693f09c944450a upstream.
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>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
sched: Move all scheduler bits into kernel/sched/2011-11-17T11:20:22ZPeter Zijlstraa.p.zijlstra@chello.nl2011-11-15T16:14:39Zurn:sha1:391e43da797a96aeb65410281891f6d0b0e9611c
There's too many sched*.[ch] files in kernel/, give them their own
directory.
(No code changed, other than Makefile glue added.)
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>