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authorJoonsoo Kim <iamjoonsoo.kim@lge.com>2013-04-23 17:27:37 +0900
committerIngo Molnar <mingo@kernel.org>2013-04-24 08:52:43 +0200
commitf1cd0858100c67273f2c74344e0c464344c4a982 (patch)
tree1b3acc84023a16fabf7c37bf0bdb782fe25094cb /kernel/sched
parent642dbc39ab1ea00f47e0fee1b8e8a27da036d940 (diff)
downloadlinux-f1cd0858100c67273f2c74344e0c464344c4a982.tar.bz2
sched: Change position of resched_cpu() in load_balance()
cur_ld_moved is reset if env.flags hit LBF_NEED_BREAK. So, there is possibility that we miss doing resched_cpu(). Correct it as changing position of resched_cpu() before checking LBF_NEED_BREAK. Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Tested-by: Jason Low <jason.low2@hp.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> Cc: Davidlohr Bueso <davidlohr.bueso@hp.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1366705662-3587-2-git-send-email-iamjoonsoo.kim@lge.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched')
-rw-r--r--kernel/sched/fair.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 1c977350e322..25aaf93281de 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5080,17 +5080,17 @@ more_balance:
double_rq_unlock(env.dst_rq, busiest);
local_irq_restore(flags);
- if (env.flags & LBF_NEED_BREAK) {
- env.flags &= ~LBF_NEED_BREAK;
- goto more_balance;
- }
-
/*
* some other cpu did the load balance for us.
*/
if (cur_ld_moved && env.dst_cpu != smp_processor_id())
resched_cpu(env.dst_cpu);
+ if (env.flags & LBF_NEED_BREAK) {
+ env.flags &= ~LBF_NEED_BREAK;
+ goto more_balance;
+ }
+
/*
* Revisit (affine) tasks on src_cpu that couldn't be moved to
* us and move them to an alternate dst_cpu in our sched_group