linux-kernel - Re: Kernel Panic sysrq questions

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Message-ID: <20170919002306.GI378890@devbig577.frc2.facebook.com>
Date:   Mon, 18 Sep 2017 17:23:07 -0700
From:   Tejun Heo <tj@...nel.org>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Sriram V <vshrirama@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: Kernel Panic sysrq questions

Hello,

On Mon, Sep 18, 2017 at 03:35:36PM -0700, Randy Dunlap wrote:
> > My Understanding is When a fatal panic happens, The Kernel is in
> > frozen state (no workques
> > or tasks get executed).
> > 
> > Is my understanding correct or am i missing something here.
> 
> Hi,
> What kernel version?
> 
> I don't see anything in the wq docs about that specific point.

There's nothing workqueue specific there.  Panic doesn't bring the
system to a complete stop in general.  If you wanna change how the
system behaves post-panic, please take a look at panic= boot param.

Thanks.

-- 
tejun