sched/fair: Set next buddy for preempt short

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If a shorter slice task can preempt current at wakeup, we make sure that
the decision will not be overwritten in between by setting the task as the
next buddy. This still implies that the waking task remains eligible when
the scheduler will actually pick the next task to run.

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: K Prateek Nayak <kprateek.nayak@amd.com>
Link: https://patch.msgid.link/20260624151229.1710703-2-vincent.guittot@linaro.org

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Vincent Guittot 2026-06-24 17:12:24 +02:00 • committed by Peter Zijlstra

parent 3cd1f657fa

commit 8f97b627ff

1 changed files with 10 additions and 1 deletions

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kernel/sched/fair.c

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