MIME-Version: 1.0
From: Sriram V <vshrirama@gmail.com>
Date: Fri, 18 Aug 2017 21:10:25 +0530
Message-ID: <CAH9_wRPOnUNQQS9-m0nGpp22wTwPkJXBQ_iOTUvqoqDt_WqMJA@mail.gmail.com>
Subject: Kernel Panic sysrq questions
To: linux-kernel@vger.kernel.org
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Sender: linux-kernel-owner@vger.kernel.org
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Hi,

1. I am testing my watchdog driver. The driver uses the internal
watchdog (Internal to SOC).
2. I use a single core SOC.
3. I have a workqueue which pets the watchdog every 60 seconds.
4. I trigger a kernel crash by doing a echo c > /proc/sysrq-trigger to
trigger  a kernel crash
5. Even after the crash, I observe that the workqueue gets
periodically executed. (I have a printk
    inside the workqueue before the pet as a result the watchdog does
not reset the board.

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.


Thanks,

Regards,
Sriram