sched/fair: Fix lag clamp

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Vincent reported that he was seeing undue lag clamping in a mixed
slice workload. Implement the max_slice tracking as per the todo
comment.

Fixes: 147f3efaa2 ("sched/fair: Implement an EEVDF-like scheduling policy")
Reported-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Vincent Guittot <vincent.guittot@linaro.org>
Tested-by: K Prateek Nayak <kprateek.nayak@amd.com>
Tested-by: Shubhang Kaushik <shubhang@os.amperecomputing.com>
Link: https://patch.msgid.link/20250422101628.GA33555@noisy.programming.kicks-ass.net

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This commit is contained in:

Peter Zijlstra 2025-04-22 12:16:28 +02:00

parent ff38424030

commit 6e3c0a4e1a

2 changed files with 36 additions and 4 deletions

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1

include/linux/sched.h

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39

kernel/sched/fair.c

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