linux-kernel - Re: [PATCH] lib/test_lockup: test module to generate lockups

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Message-Id: <20200210144101.e144335455399d6d84d92370@linux-foundation.org>
Date:   Mon, 10 Feb 2020 14:41:01 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
Cc:     linux-kernel@...r.kernel.org, Sasha Levin <sashal@...nel.org>,
        Petr Mladek <pmladek@...e.com>,
        Kees Cook <keescook@...omium.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Dmitry Monakhov <dmtrmonakhov@...dex-team.ru>
Subject: Re: [PATCH] lib/test_lockup: test module to generate lockups

On Mon, 10 Feb 2020 12:56:31 +0300 Konstantin Khlebnikov <khlebnikov@...dex-team.ru> wrote:

> CONFIG_TEST_LOCKUP=m adds module "test_lockup" that helps to make sure
> that watchdogs and lockup detectors are working properly.

Now we'll get test robot reports "hey this makes my kernel lock up" ;)

Is there any way in which we can close the loop here?  Add a
tools/testing/selftests script which loads the module, attempts to
trigger a lockup and then checks whether it happened as expected? 
Sounds tricky.