sched: Use fair:prio_changed() instead of ad-hoc implementation

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set_user_nice() implements its own version of fair::prio_changed() and
therefore misses a specific optimization towards nohz_full CPUs that
avoid sending an resched IPI to a reniced task running alone. Use the
proper callback instead.

Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20191203160106.18806-3-frederic@kernel.org

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Frederic Weisbecker 2019-12-03 17:01:06 +01:00 • committed by Peter Zijlstra

parent 7c2e8bbd87

commit 5443a0be61

1 changed files with 8 additions and 8 deletions

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kernel/sched/core.c

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