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authorPeter Zijlstra <peterz@infradead.org>2021-05-13 02:29:23 +0300
committerIngo Molnar <mingo@kernel.org>2021-05-13 15:21:23 +0300
commit0fdcccfafcffac70b452b3127cc3d981f0117655 (patch)
tree9c23bd4ad372b6ea648045d1bdee187e2e0a9d5a /kernel/time/tick-sched.c
parenta1dfb6311c7739e21e160bc4c5575a1b21b48c87 (diff)
downloadlinux-0fdcccfafcffac70b452b3127cc3d981f0117655.tar.xz
tick/nohz: Call tick_nohz_task_switch() with interrupts disabled
Call tick_nohz_task_switch() slightly earlier after the context switch to benefit from disabled IRQs. This way the function doesn't need to disable them once more. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20210512232924.150322-10-frederic@kernel.org
Diffstat (limited to 'kernel/time/tick-sched.c')
-rw-r--r--kernel/time/tick-sched.c7
1 files changed, 1 insertions, 6 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 197a3bd882ad..6ea619d644fa 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -487,13 +487,10 @@ void tick_nohz_dep_clear_signal(struct signal_struct *sig, enum tick_dep_bits bi
*/
void __tick_nohz_task_switch(void)
{
- unsigned long flags;
struct tick_sched *ts;
- local_irq_save(flags);
-
if (!tick_nohz_full_cpu(smp_processor_id()))
- goto out;
+ return;
ts = this_cpu_ptr(&tick_cpu_sched);
@@ -502,8 +499,6 @@ void __tick_nohz_task_switch(void)
atomic_read(&current->signal->tick_dep_mask))
tick_nohz_full_kick();
}
-out:
- local_irq_restore(flags);
}
/* Get the boot-time nohz CPU list from the kernel parameters. */