sched/proxy: Only return migrate when needed

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Current code will 'unconditionally' return migrate on PROXY_WAKING, even if the
task is (still) on the original CPU.

Check task_cpu(p) against p->waking_cpu, which per proxy_set_task_cpu()
preserves the original CPU the task was on. If they do not mis-match, there is
no need to go through the more expensive wakeup path.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260527082916.GP3126523%40noisy.programming.kicks-ass.net

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Peter Zijlstra 2026-05-27 09:58:02 +02:00

parent 708024b575

commit 7918cf3693

1 changed files with 15 additions and 0 deletions

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kernel/sched/core.c

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