sched/deadline: Fix dl_server time accounting

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The dl_server time accounting code is a little odd. The normal scheduler
pattern is to update curr before doing something, such that the old state is
fully accounted before changing state.

Notably, the dl_server_timer() needs to propagate the current time accounting
since the current task could be ran by dl_server and thus this can affect
dl_se->runtime. Similarly for dl_server_start().

And since the (deferred) dl_server wants idle time accounted, rework
sched_idle_class time accounting to be more like all the others.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20251020141130.GJ3245006@noisy.programming.kicks-ass.net

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This commit is contained in:

Peter Zijlstra 2025-10-20 16:15:05 +02:00

parent e40cea333e

commit e636ffb9e3

4 changed files with 33 additions and 35 deletions

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40

kernel/sched/deadline.c

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9

kernel/sched/fair.c

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16

kernel/sched/idle.c

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3

kernel/sched/sched.h

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