linux/kernel/sched
Linus Torvalds 4293f20c19 Revert "CPU hotplug, cpusets, suspend: Don't touch cpusets during suspend/resume"
This reverts commit 8f2f748b06.

It causes some odd regression that we have not figured out, and it's too
late in the -rc series to try to figure it out now.

As reported by Konstantin Khlebnikov, it causes consistent hangs on his
laptop (Thinkpad x220: 2x cores + HT).  They can be avoided by adding
calls to "rebuild_sched_domains();" in cpuset_cpu_[in]active() for the
CPU_{ONLINE/DOWN_FAILED/DOWN_PREPARE}_FROZEN cases, but it's not at all
clear why, and it makes no sense.

Konstantin's config doesn't even have CONFIG_CPUSETS enabled, just to
make things even more interesting.  So it's not the cpusets, it's just
the scheduling domains.

So until this is understood, revert.

Bisected-reported-and-tested-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-07 08:21:19 -08:00
..
auto_group.c
auto_group.h
clock.c
core.c Revert "CPU hotplug, cpusets, suspend: Don't touch cpusets during suspend/resume" 2012-03-07 08:21:19 -08:00
cpupri.c
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