From 71b1da46ff70309a2ec12ce943aa0d192d2c8f0c Mon Sep 17 00:00:00 2001 From: Frederic Weisbecker Date: Fri, 12 Apr 2013 01:50:59 +0200 Subject: [PATCH] sched: Update rq clock before setting fair group shares Because we may update the execution time in sched_group_set_shares()->update_cfs_shares()->reweight_entity()->update_curr() before reweighting the entity while setting the group shares and this requires an uptodate version of the runqueue clock. Signed-off-by: Frederic Weisbecker Cc: Li Zhong Cc: Steven Rostedt Cc: Paul Turner Cc: Mike Galbraith Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/1365724262-20142-3-git-send-email-fweisbec@gmail.com Signed-off-by: Ingo Molnar --- kernel/sched/fair.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index f62b16d..f76ca21 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -6107,6 +6107,9 @@ int sched_group_set_shares(struct task_group *tg, unsigned long shares) se = tg->se[i]; /* Propagate contribution to hierarchy */ raw_spin_lock_irqsave(&rq->lock, flags); + + /* Possible calls to update_curr() need rq clock */ + update_rq_clock(rq); for_each_sched_entity(se) update_cfs_shares(group_cfs_rq(se)); raw_spin_unlock_irqrestore(&rq->lock, flags); -- 2.7.4