linux-kernel - Re: 回复: [PATCH v2] sched/eevdf: Force propagating min_slice of cfs

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Message-ID: <d83e1631-237e-4743-b067-6cc54771eee7@linux.alibaba.com>
Date: Thu, 14 Nov 2024 10:45:56 +0800
From: Tianchen Ding <dtcccc@...ux.alibaba.com>
To: 解 咏梅 <xieym_ict@...mail.com>
Cc: Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org>,
 Juri Lelli <juri.lelli@...hat.com>,
 Vincent Guittot <vincent.guittot@...aro.org>,
 Dietmar Eggemann <dietmar.eggemann@....com>,
 Steven Rostedt <rostedt@...dmis.org>, Ben Segall <bsegall@...gle.com>,
 Mel Gorman <mgorman@...e.de>, Valentin Schneider <vschneid@...hat.com>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: 回复: [PATCH v2] sched/eevdf: Force propagating min_slice of cfs_rq when a task changing slice

On 2024/11/13 19:50, 解 咏梅 wrote:
> Similar problem as commit d2929762 & 8dafa9d0, but this time heap integrity is corrupted by min_slice attr.
> commit eab03c23c fixed it by explicitly calling __dequeue_entity and __enqueue_entity in reweight_entity.
> 
> But, it's rare case, it only happens when adjust task's select by setting up scheduler attribute.
> 

It's not rare. Since it's in enqueue/dequeue common path, wakeup/sleep may also 
trigger this issue.

> 
> Regards,
> Yongmei.