| From | Paul Gortmaker <> | Subject | [34-longterm 084/247] sched: Move sched_avg_update() to update_cpu_load() | Date | Thu, 23 Jun 2011 13:32:32 -0400 |
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From: Suresh Siddha <suresh.b.siddha@intel.com>
------------------- This is a commit scheduled for the next v2.6.34 longterm release. If you see a problem with using this for longterm, please comment. -------------------
commit da2b71edd8a7db44fe1746261410a981f3e03632 upstream.
Currently sched_avg_update() (which updates rt_avg stats in the rq) is getting called from scale_rt_power() (in the load balance context) which doesn't take rq->lock.
Fix it by moving the sched_avg_update() to more appropriate update_cpu_load() where the CFS load gets updated as well.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1282596171.2694.3.camel@sbsiddha-MOBL3> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> --- kernel/sched.c | 6 ++++++ kernel/sched_fair.c | 2 -- 2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/kernel/sched.c b/kernel/sched.c index 12ee156..c3e891f 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -1269,6 +1269,10 @@ static void resched_task(struct task_struct *p) static void sched_rt_avg_update(struct rq *rq, u64 rt_delta) { } + +static void sched_avg_update(struct rq *rq) +{ +} #endif /* CONFIG_SMP */ #if BITS_PER_LONG == 32 @@ -3102,6 +3106,8 @@ static void update_cpu_load(struct rq *this_rq) this_rq->calc_load_update += LOAD_FREQ; calc_load_account_active(this_rq); } + + sched_avg_update(this_rq); } #ifdef CONFIG_SMP diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 72eb9a6..3a0f7ba 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -2337,8 +2337,6 @@ unsigned long scale_rt_power(int cpu) struct rq *rq = cpu_rq(cpu); u64 total, available; - sched_avg_update(rq); - total = sched_avg_period() + (rq->clock - rq->age_stamp); available = total - rq->rt_avg; -- 1.7.4.4
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