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authorPeter Zijlstra <peterz@infradead.org>2009-04-01 18:40:15 +0200
committerIngo Molnar <mingo@elte.hu>2009-07-10 10:43:29 +0200
commita1ba4d8ba9f06a397e97cbd67a93ee306860b40a (patch)
treef0e0f92a2c0763f8ec162c2b0e2abc389075b207 /kernel/sched.c
parentd4ec36bac3de39b7e10ec8f42fbdd20d9a9ed753 (diff)
downloadop-kernel-dev-a1ba4d8ba9f06a397e97cbd67a93ee306860b40a.zip
op-kernel-dev-a1ba4d8ba9f06a397e97cbd67a93ee306860b40a.tar.gz
sched_rt: Fix overload bug on rt group scheduling
Fixes an easily triggerable BUG() when setting process affinities. Make sure to count the number of migratable tasks in the same place: the root rt_rq. Otherwise the number doesn't make sense and we'll hit the BUG in set_cpus_allowed_rt(). Also, make sure we only count tasks, not groups (this is probably already taken care of by the fact that rt_se->nr_cpus_allowed will be 0 for groups, but be more explicit) Tested-by: Thomas Gleixner <tglx@linutronix.de> CC: stable@kernel.org Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Gregory Haskins <ghaskins@novell.com> LKML-Reference: <1247067476.9777.57.camel@twins> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
-rw-r--r--kernel/sched.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 7c9098d..a17f3d9 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -493,6 +493,7 @@ struct rt_rq {
#endif
#ifdef CONFIG_SMP
unsigned long rt_nr_migratory;
+ unsigned long rt_nr_total;
int overloaded;
struct plist_head pushable_tasks;
#endif
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