diff options
| author | Will Deacon <will@kernel.org> | 2021-07-30 12:24:31 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-08-20 12:32:59 +0200 |
| commit | 97c0054dbe2c3c59d1156fd233f2d44e91981c8e (patch) | |
| tree | fe236eb64fc7760d430b8b2272ffb10f222efa79 /kernel/sched | |
| parent | 431c69fac05baa7477d61a44f2708e069f2bed6c (diff) | |
cpuset: Cleanup cpuset_cpus_allowed_fallback() use in select_fallback_rq()
select_fallback_rq() only needs to recheck for an allowed CPU if the
affinity mask of the task has changed since the last check.
Return a 'bool' from cpuset_cpus_allowed_fallback() to indicate whether
the affinity mask was updated, and use this to elide the allowed check
when the mask has been left alone.
No functional change.
Suggested-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Link: https://lore.kernel.org/r/20210730112443.23245-5-will@kernel.org
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 6f31267c4beb..b9d4bae922a8 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3141,8 +3141,7 @@ static int select_fallback_rq(int cpu, struct task_struct *p) /* No more Mr. Nice Guy. */ switch (state) { case cpuset: - if (IS_ENABLED(CONFIG_CPUSETS)) { - cpuset_cpus_allowed_fallback(p); + if (cpuset_cpus_allowed_fallback(p)) { state = possible; break; } |