tree 9dc1a41330100d587a3ea7a8f0fdfa13ce0d7b76
parent 7c2e8bbd87db661122e92d71a394dd7bb3ada4d3
author Frederic Weisbecker <frederic@kernel.org> 1575388866 +0100
committer Peter Zijlstra <peterz@infradead.org> 1576585970 +0100

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

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