Commit-ID: de5eb2dd7f171ee8a45d23cd41aa2efe9ab922b3 Gitweb: http://git.kernel.org/tip/de5eb2dd7f171ee8a45d23cd41aa2efe9ab922b3 Author: Joonsoo Kim <iamjoonsoo....@lge.com> AuthorDate: Tue, 23 Apr 2013 17:27:38 +0900 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Wed, 24 Apr 2013 08:52:43 +0200
sched: Explicitly cpu_idle_type checking in rebalance_domains() After commit 88b8dac0, dst-cpu can be changed in load_balance(), then we can't know cpu_idle_type of dst-cpu when load_balance() return positive. So, add explicit cpu_idle_type checking. Signed-off-by: Joonsoo Kim <iamjoonsoo....@lge.com> Tested-by: Jason Low <jason.l...@hp.com> Acked-by: Peter Zijlstra <a.p.zijls...@chello.nl> Cc: Srivatsa Vaddagiri <va...@linux.vnet.ibm.com> Cc: Davidlohr Bueso <davidlohr.bu...@hp.com> Cc: Peter Zijlstra <pet...@infradead.org> Link: http://lkml.kernel.org/r/1366705662-3587-3-git-send-email-iamjoonsoo....@lge.com Signed-off-by: Ingo Molnar <mi...@kernel.org> --- kernel/sched/fair.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 25aaf93..726e129 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -5523,10 +5523,11 @@ static void rebalance_domains(int cpu, enum cpu_idle_type idle) if (time_after_eq(jiffies, sd->last_balance + interval)) { if (load_balance(cpu, rq, sd, idle, &balance)) { /* - * We've pulled tasks over so either we're no - * longer idle. + * The LBF_SOME_PINNED logic could have changed + * env->dst_cpu, so we can't know our idle + * state even if we migrated tasks. Update it. */ - idle = CPU_NOT_IDLE; + idle = idle_cpu(cpu) ? CPU_IDLE : CPU_NOT_IDLE; } sd->last_balance = jiffies; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
