Peter Zijlstra e194fab8d7 sched: Fix race in task_group() ... commit 8323f26ce3 upstream. Stefan reported a crash on a kernel before a3e5d1091c ("sched: Don't call task_group() too many times in set_task_rq()"), he found the reason to be that the multiple task_group() invocations in set_task_rq() returned different values. Looking at all that I found a lack of serialization and plain wrong comments. The below tries to fix it using an extra pointer which is updated under the appropriate scheduler locks. Its not pretty, but I can't really see another way given how all the cgroup stuff works. Reported-and-tested-by: Stefan Bader <stefan.bader@canonical.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1340364965.18025.71.camel@twins Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2012-10-02 10:30:35 -07:00
..
auto_group.c	sched: Clean up parameter passing of proc_sched_autogroup_set_nice()	2012-03-02 12:23:49 +01:00
auto_group.h
clock.c
core.c	sched: Fix race in task_group()	2012-10-02 10:30:35 -07:00
cpupri.c
cpupri.h
debug.c	sched: Remove sched_switch	2012-01-27 13:28:53 +01:00
fair.c	sched: Fix more load-balancing fallout	2012-04-26 12:54:52 +02:00
features.h	sched: Fix more load-balancing fallout	2012-04-26 12:54:52 +02:00
idle_task.c	sched/nohz: Rewrite and fix load-avg computation -- again	2012-07-19 08:58:56 -07:00
Makefile
rt.c	sched/rt: Improve pick_next_highest_task_rt()	2012-03-27 14:52:12 +02:00
sched.h	sched: Fix race in task_group()	2012-10-02 10:30:35 -07:00
stats.c	sched: Remove sched_switch	2012-01-27 13:28:53 +01:00
stats.h
stop_task.c