linux-kernel - Re: [QUESTION] Hung task warning while running syzkaller test

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Message-ID: <1e247b1f-74cf-dab3-05c1-36adc411478d@arm.com>
Date:   Fri, 25 Oct 2019 15:26:43 +0000
From:   Valentin Schneider <Valentin.Schneider@....com>
To:     Zhihao Cheng <chengzhihao1@...wei.com>,
        LKML <linux-kernel@...r.kernel.org>,
        "peterz@...radead.org" <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Patrick Bellasi <Patrick.Bellasi@....com>,
        "tglx@...utronix.de" <tglx@...utronix.de>
CC:     Kefeng Wang <wangkefeng.wang@...wei.com>,
        "zhangyi (F)" <yi.zhang@...wei.com>
Subject: Re: [QUESTION] Hung task warning while running syzkaller test

On 25/10/2019 13:50, Zhihao Cheng wrote:
> I added config in attachment.
>
> It will take 5-10 minutes to reproduce on the kernel of the lower version(for example, v4.4). And ftrace may need to be enabled for the latest mainline to reproduce hung_task, it will take several hours.
>

That sounds fun. I'll try to get that running overnight someday I'm not
running other stuff, though TBH seeing as the freezer is involved I wonder if
it isn't just syzkaller keeping stuff frozen for too long.
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