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Message-ID: <20231006192445.GE743@noisy.programming.kicks-ass.net>
Date: Fri, 6 Oct 2023 21:24:45 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Mike Galbraith <efault@....de>
Cc: Marek Szyprowski <m.szyprowski@...sung.com>,
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Subject: Re: [PATCH] sched/fair: fix pick_eevdf to always find the correct se
On Fri, Oct 06, 2023 at 05:55:01PM +0200, Peter Zijlstra wrote:
> And yeah, min_deadline is hosed somehow.
>
> migration/28-185 [028] d..2. 70.264274: validate_cfs_rq: --- /
> migration/28-185 [028] d..2. 70.264277: __print_se: ffff88845cf48080 w: 1024 ve: -58857638 lag: 870381 vd: -55861854 vmd: -66302085 E (11372/tr)
> migration/28-185 [028] d..2. 70.264280: __print_se: ffff88810d165800 w: 25 ve: -80323686 lag: 22336429 vd: -41496434 vmd: -66302085 E (-1//autogroup-31)
> migration/28-185 [028] d..2. 70.264282: __print_se: ffff888108379000 w: 25 ve: 0 lag: -57987257 vd: 114632828 vmd: 114632828 N (-1//autogroup-33)
> migration/28-185 [028] d..2. 70.264283: validate_cfs_rq: min_deadline: -55861854 avg_vruntime: -62278313462 / 1074 = -57987256
>
> I need to go make dinner (kids hungry), but I'll see if I can figure out
> how this happens...
*sigh*, does the below help?
---
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 04fbcbda97d5..6a670f119efa 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -3632,6 +3747,7 @@ static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
*/
deadline = div_s64(deadline * old_weight, weight);
se->deadline = se->vruntime + deadline;
+ min_deadline_cb_propagate(&se->run_node, NULL);
}
#ifdef CONFIG_SMP
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