Commit-ID: 2810f611f908112ea1b30bc016d25205acb3d486
Gitweb: http://git.kernel.org/tip/2810f611f908112ea1b30bc016d25205acb3d486
Author: Frederic Weisbecker <fweisbec@xxxxxxxxx>
AuthorDate: Mon, 26 Sep 2016 02:29:18 +0200
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Fri, 30 Sep 2016 11:46:39 +0200
sched/irqtime: Remove needless IRQs disablement on kcpustat update
The callers of the functions performing irqtime kcpustat updates have
IRQS disabled, no need to disable them again.
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>
Cc: Eric Dumazet <eric.dumazet@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Wanpeng Li <wanpeng.li@xxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1474849761-12678-3-git-send-email-fweisbec@xxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/sched/cputime.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index f111076..94b1a72 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -78,30 +78,26 @@ EXPORT_SYMBOL_GPL(irqtime_account_irq);
static cputime_t irqtime_account_hi_update(cputime_t maxtime)
{
u64 *cpustat = kcpustat_this_cpu->cpustat;
- unsigned long flags;
cputime_t irq_cputime;
- local_irq_save(flags);
irq_cputime = nsecs_to_cputime64(__this_cpu_read(cpu_hardirq_time)) -
cpustat[CPUTIME_IRQ];
irq_cputime = min(irq_cputime, maxtime);
cpustat[CPUTIME_IRQ] += irq_cputime;
- local_irq_restore(flags);
+
return irq_cputime;
}
static cputime_t irqtime_account_si_update(cputime_t maxtime)
{
u64 *cpustat = kcpustat_this_cpu->cpustat;
- unsigned long flags;
cputime_t softirq_cputime;
- local_irq_save(flags);
softirq_cputime = nsecs_to_cputime64(__this_cpu_read(cpu_softirq_time)) -
cpustat[CPUTIME_SOFTIRQ];
softirq_cputime = min(softirq_cputime, maxtime);
cpustat[CPUTIME_SOFTIRQ] += softirq_cputime;
- local_irq_restore(flags);
+
return softirq_cputime;
}
@@ -295,6 +291,9 @@ static inline cputime_t account_other_time(cputime_t max)
{
cputime_t accounted;
+ /* Shall be converted to a lockdep-enabled lightweight check */
+ WARN_ON_ONCE(!irqs_disabled());
+
accounted = steal_account_process_time(max);
if (accounted < max)
--
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