Commit-ID: b52fad2db5d792d89975cebf2fe1646a7af28ed0 Gitweb: http://git.kernel.org/tip/b52fad2db5d792d89975cebf2fe1646a7af28ed0 Author: Matt Fleming <m...@codeblueprint.co.uk> AuthorDate: Tue, 3 May 2016 20:46:54 +0100 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Thu, 5 May 2016 09:41:09 +0200
sched/fair: Update rq clock before updating nohz CPU load If we're accessing rq_clock() (e.g. in sched_avg_update()) we should update the rq clock before calling cpu_load_update(), otherwise any time calculations will be stale. All other paths currently call update_rq_clock(). Signed-off-by: Matt Fleming <m...@codeblueprint.co.uk> Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org> Reviewed-by: Wanpeng Li <wanpeng...@hotmail.com> Cc: Frederic Weisbecker <fweis...@gmail.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Mel Gorman <mgor...@techsingularity.net> Cc: Mike Galbraith <efa...@gmx.de> Cc: Mike Galbraith <umgwanakikb...@gmail.com> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Rik van Riel <r...@redhat.com> Cc: Thomas Gleixner <t...@linutronix.de> Link: http://lkml.kernel.org/r/1462304814-11715-1-git-send-email-m...@codeblueprint.co.uk Signed-off-by: Ingo Molnar <mi...@kernel.org> --- kernel/sched/fair.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 8c381a6..7a00c7c 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -4724,6 +4724,7 @@ void cpu_load_update_nohz_stop(void) load = weighted_cpuload(cpu_of(this_rq)); raw_spin_lock(&this_rq->lock); + update_rq_clock(this_rq); cpu_load_update_nohz(this_rq, curr_jiffies, load); raw_spin_unlock(&this_rq->lock); }
