linux-kernel - Re: [PATCH] sched_fair: test list head instead of list entry in throttle_cfs

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Message-ID: <CAM_iQpUB1p+63vP-xV0_kieEN1DyGoqc2fVRHunFdsZYzpeYTA@mail.gmail.com>
Date:	Fri, 3 Jul 2015 09:09:12 -0700
From:	Cong Wang <xiyou.wangcong@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Cong Wang <xiyou.wangcong@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Cong Wang <cwang@...pensource.com>
Subject: Re: [PATCH] sched_fair: test list head instead of list entry in throttle_cfs_rq()

On Wed, Jun 24, 2015 at 12:41 PM, Cong Wang <xiyou.wangcong@...il.com> wrote:
> According to the comments, we need to test if this is
> the first throttled task, however, list_empty() tests on
> the entry cfs_rq->throttled_list, not the head, this is wrong.
>
> This is a bug because we don't re-init the list entry after
> removing it from the list, so list_empty() could return false
> even if the list is really empty.
>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>
> Signed-off-by: Cong Wang <cwang@...pensource.com>

ping.

What's the status of this patch?
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