sched: psi: pass enqueue/dequeue flags to psi callbacks directly

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What psi needs to do on each enqueue and dequeue has gotten more
subtle, and the generic sched code trying to distill this into a bool
for the callbacks is awkward.

Pass the flags directly and let psi parse them. For that to work, the
#include "stats.h" (which has the psi callback implementations) needs
to be below the flag definitions in "sched.h". Move that section
further down, next to some of the other accounting stuff.

This also puts the ENQUEUE_SAVE/RESTORE branch behind the psi jump
label, slightly reducing overhead when PSI=y but runtime disabled.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20241014144358.GB1021@cmpxchg.org

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This commit is contained in:

Johannes Weiner 2024-10-14 10:43:58 -04:00 • committed by Peter Zijlstra

parent 23f1178ad7

commit 1a6151017e

3 changed files with 53 additions and 44 deletions

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12

kernel/sched/core.c

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56

kernel/sched/sched.h

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29

kernel/sched/stats.h

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