linux-kernel - Re: [PATCH] sched/debug: check p->se.on

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Message-ID: <CAC8teKXxKPsJnvNMiYb2H4HdEBqYPxfTWSUJpxHm90mEFwBsxA@mail.gmail.com>
Date:   Fri, 23 Sep 2016 11:14:51 +0800
From:   Zhu Yanhai <zhu.yanhai@...il.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Zhu Yanhai <zhu.yanhai@...mail.com>,
        Ingo Molnar <mingo@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>, shanpei.csp@...baba-inc.com,
        jinli.zjl@...baba-inc.com, Zhu Yanhai <gaoyang.zyh@...bao.com>
Subject: Re: [PATCH] sched/debug: check p->se.on_rq for 'runnable tasks'

2016-09-22 18:08 GMT+08:00 Peter Zijlstra <peterz@...radead.org>:
> On Thu, Sep 22, 2016 at 05:50:53PM +0800, Zhu Yanhai wrote:
>> From: Zhu Yanhai <gaoyang.zyh@...bao.com>
>>
>> I can't see why the check was removed by commit b32e86b4. Since it was not
>> relevant to the subject of the commit, I guess it was just a plain typo.
>
> No, it was very much on purpose. It shows all tasks now, which is much
> more useful if you want to generate pretty pictures from the output.
>
> Its a bit hard to make pretty pictures when tasks disappear all the
> time.

I see. Thanks for your quick reply!