linux-kernel - Re: [PATCH 1/1] mm: sysctl: add panic_on_mm

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Message-ID: <063e702f-dc5f-b0ca-fe26-508a9f1e8e9a@I-love.SAKURA.ne.jp>
Date:   Mon, 27 Jan 2020 19:42:56 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:     Grzegorz Halat <ghalat@...hat.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        linux-fsdevel@...r.kernel.org, linux-doc@...r.kernel.org,
        ssaner@...hat.com, atomlin@...hat.com, oleksandr@...hat.com,
        vbendel@...hat.com, kirill@...temov.name,
        khlebnikov@...dex-team.ru, borntraeger@...ibm.com,
        Andrew Morton <akpm@...ux-foundation.org>,
        Iurii Zaikin <yzaikin@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Jonathan Corbet <corbet@....net>
Subject: Re: [PATCH 1/1] mm: sysctl: add panic_on_mm_error sysctl

On 2020/01/27 19:11, Grzegorz Halat wrote:
> diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
> index def074807cee..2fecd6b2547e 100644
> --- a/Documentation/admin-guide/sysctl/kernel.rst
> +++ b/Documentation/admin-guide/sysctl/kernel.rst
> @@ -61,6 +61,7 @@ show up in /proc/sys/kernel:
>  - overflowgid
>  - overflowuid
>  - panic
> +- panic_on_mm_error

Maybe panic_on_inconsistent_mm is better, for an MM error sounds too generic
(e.g. is page allocation failure an error, is OOM killer an error,
is NULL pointer dereference an error, is use-after-free access an error) ?

Also, should this be in /proc/sys/vm/ than /proc/sys/kernel/ ?

>  - panic_on_oops
>  - panic_on_stackoverflow
>  - panic_on_unrecovered_nmi