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| author | Vincent Guittot <vincent.guittot@linaro.org> | 2018-09-25 11:17:42 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-10-02 09:45:00 +0200 |
| commit | 11d4afd4ff667f9b6178ee8c142c36cb78bd84db (patch) | |
| tree | a327db3eb28ed3e0b023525528ebf3d9abdfe2c6 /kernel/sched/core.c | |
| parent | b429f71bca5a4ddd914350a39572692e2ea211e0 (diff) | |
| download | linux-stable-11d4afd4ff667f9b6178ee8c142c36cb78bd84db.tar.gz linux-stable-11d4afd4ff667f9b6178ee8c142c36cb78bd84db.tar.bz2 linux-stable-11d4afd4ff667f9b6178ee8c142c36cb78bd84db.zip | |
sched/pelt: Fix warning and clean up IRQ PELT config
Create a config for enabling irq load tracking in the scheduler.
irq load tracking is useful only when irq or paravirtual time is
accounted but it's only possible with SMP for now.
Also use __maybe_unused to remove the compilation warning in
update_rq_clock_task() that has been introduced by:
2e62c4743adc ("sched/fair: Remove #ifdefs from scale_rt_capacity()")
Suggested-by: Ingo Molnar <mingo@redhat.com>
Reported-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
Reported-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: bp@alien8.de
Cc: dou_liyang@163.com
Fixes: 2e62c4743adc ("sched/fair: Remove #ifdefs from scale_rt_capacity()")
Link: http://lkml.kernel.org/r/1537867062-27285-1-git-send-email-vincent.guittot@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/core.c')
| -rw-r--r-- | kernel/sched/core.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index ad97f3ba5ec5..f2caf1bae4a3 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -135,9 +135,8 @@ static void update_rq_clock_task(struct rq *rq, s64 delta) * In theory, the compile should just see 0 here, and optimize out the call * to sched_rt_avg_update. But I don't trust it... */ -#if defined(CONFIG_IRQ_TIME_ACCOUNTING) || defined(CONFIG_PARAVIRT_TIME_ACCOUNTING) - s64 steal = 0, irq_delta = 0; -#endif + s64 __maybe_unused steal = 0, irq_delta = 0; + #ifdef CONFIG_IRQ_TIME_ACCOUNTING irq_delta = irq_time_read(cpu_of(rq)) - rq->prev_irq_time; @@ -177,7 +176,7 @@ static void update_rq_clock_task(struct rq *rq, s64 delta) rq->clock_task += delta; -#ifdef HAVE_SCHED_AVG_IRQ +#ifdef CONFIG_HAVE_SCHED_AVG_IRQ if ((irq_delta + steal) && sched_feat(NONTASK_CAPACITY)) update_irq_load_avg(rq, irq_delta + steal); #endif |