Srivatsa S. Bhat 8f2f748b06 CPU hotplug, cpusets, suspend: Don't touch cpusets during suspend/resume ... Currently, during CPU hotplug, the cpuset callbacks modify the cpusets to reflect the state of the system, and this handling is asymmetric. That is, upon CPU offline, that CPU is removed from all cpusets. However when it comes back online, it is put back only to the root cpuset. This gives rise to a significant problem during suspend/resume. During suspend, we offline all non-boot cpus and during resume we online them back. Which means, after a resume, all cpusets (except the root cpuset) will be restricted to just one single CPU (the boot cpu). But the whole point of suspend/resume is to restore the system to a state which is as close as possible to how it was before suspend. So to fix this, don't touch cpusets during suspend/resume. That is, modify the cpuset-related CPU hotplug callback to just ignore CPU hotplug when it is initiated as part of the suspend/resume sequence. Reported-by: Prashanth Nageshappa <prashanth@linux.vnet.ibm.com> Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/4F460D7B.1020703@linux.vnet.ibm.com Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>		2012-02-27 11:38:13 +01:00
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auto_group.c
auto_group.h
clock.c
core.c	CPU hotplug, cpusets, suspend: Don't touch cpusets during suspend/resume	2012-02-27 11:38:13 +01:00
cpupri.c	kernel-doc: fix kernel-doc warnings in sched	2012-01-23 08:44:54 -08:00
cpupri.h
debug.c
fair.c	sched/events: Revert trace_sched_stat_sleeptime()	2012-02-22 12:06:55 +01:00
features.h
idle_task.c
Makefile
rt.c	sched/rt: Fix task stack corruption under __ARCH_WANT_INTERRUPTS_ON_CTXSW	2012-01-27 12:49:41 +01:00
sched.h
stats.c
stats.h
stop_task.c