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

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Message-ID: <6d78bdbc-e4f8-7ff7-8445-c9dc07b0614a@arm.com>
Date:   Thu, 31 Oct 2019 02:36:42 +0100
From:   Valentin Schneider <valentin.schneider@....com>
To:     Zhihao Cheng <chengzhihao1@...wei.com>,
        LKML <linux-kernel@...r.kernel.org>, peterz@...radead.org,
        Ingo Molnar <mingo@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        patrick.bellasi@....com, 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 29/10/2019 03:25, Zhihao Cheng wrote:
> I don't know much about the freezer mechanism of CGroup, but I tried it. I turned off all the CGroup related config options and reproduced the hung task on a fresh busybox-made root file system. I added rootfs in attachment. So, I guess hung task has nothing to do with CGroup(freezer).
> 

That's good to know, thanks for digging some more. I'm on the move ATM but if
I find some time I'll try to stare some more at the C reproducer.