linux-kernel - Re: [PATCH v5 linux-kselftest-test 4/6] kunit: remove timeout dependence on sysctl_hung_task_timeout

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Message-ID: <CAFd5g45vriC61WvPL_FMbTUjJTRqHW6_Le=7PcMiR-rFmf_9wQ@mail.gmail.com>
Date:   Tue, 3 Dec 2019 14:45:03 -0800
From:   Brendan Higgins <brendanhiggins@...gle.com>
To:     Alan Maguire <alan.maguire@...cle.com>
Cc:     "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        KUnit Development <kunit-dev@...glegroups.com>,
        Kees Cook <keescook@...omium.org>,
        Iurii Zaikin <yzaikin@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        catalin.marinas@....com, joe.lawrence@...hat.com,
        penguin-kernel@...ove.sakura.ne.jp, urezki@...il.com,
        andriy.shevchenko@...ux.intel.com,
        Jonathan Corbet <corbet@....net>,
        David Gow <davidgow@...gle.com>, adilger.kernel@...ger.ca,
        "Theodore Ts'o" <tytso@....edu>,
        Luis Chamberlain <mcgrof@...nel.org>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        Knut Omang <knut.omang@...cle.com>
Subject: Re: [PATCH v5 linux-kselftest-test 4/6] kunit: remove timeout
 dependence on sysctl_hung_task_timeout_seconds

On Tue, Dec 3, 2019 at 4:08 AM Alan Maguire <alan.maguire@...cle.com> wrote:
>
> In discussion of how to handle timeouts, it was noted that if
> sysctl_hung_task_timeout_seconds is exceeded for a kunit test,
> the test task will be killed and an oops generated.  This should
> suffice as a means of debugging such timeout issues for now.
>
> Hence remove use of sysctl_hung_task_timeout_secs, which has the
> added benefit of avoiding the need to export that symbol from
> the core kernel.
>
> Co-developed-by: Knut Omang <knut.omang@...cle.com>
> Signed-off-by: Knut Omang <knut.omang@...cle.com>
> Signed-off-by: Alan Maguire <alan.maguire@...cle.com>
> Reviewed-by: Stephen Boyd <sboyd@...nel.org>

Acked-by: Brendan Higgins <brendanhiggins@...gle.com>