smp: Optimize send_call_function_single_ipi()

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Just like the ttwu_queue_remote() IPI, make use of _TIF_POLLING_NRFLAG
to avoid sending IPIs to idle CPUs.

[ mingo: Fix UP build bug. ]

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200526161907.953304789@infradead.org

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Peter Zijlstra 2020-05-26 18:11:01 +02:00 • committed by Ingo Molnar

parent afaa653c56

commit b2a02fc43a

4 changed files with 34 additions and 4 deletions

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10

kernel/sched/core.c

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5

kernel/sched/idle.c

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7

kernel/sched/sched.h

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16

kernel/smp.c

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