linux-kernel - Re: [PATCH v4 1/6] printk: Collapse shutdown types into a single dump reason

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Date:   Fri, 15 May 2020 15:17:22 -0400
From:   Pavel Tatashin <pasha.tatashin@...een.com>
To:     Kees Cook <keescook@...omium.org>
Cc:     Petr Mladek <pmladek@...e.com>, Anton Vorontsov <anton@...msg.org>,
        Colin Cross <ccross@...roid.com>,
        Tony Luck <tony.luck@...el.com>,
        Jonathan Corbet <corbet@....net>,
        Benson Leung <bleung@...omium.org>,
        Rob Herring <robh+dt@...nel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>, devicetree@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v4 1/6] printk: Collapse shutdown types into a single dump reason

On Fri, May 15, 2020 at 2:44 PM Kees Cook <keescook@...omium.org> wrote:
>
> To turn the KMSG_DUMP_* reasons into a more ordered list, collapse
> the redundant KMSG_DUMP_(RESTART|HALT|POWEROFF) reasons into
> KMSG_DUMP_SHUTDOWN. The current users already don't meaningfully
> distinguish between them, so there's no need to, as discussed here:
> https://lore.kernel.org/lkml/CA+CK2bAPv5u1ih5y9t5FUnTyximtFCtDYXJCpuyjOyHNOkRdqw@mail.gmail.com/
>
> Signed-off-by: Kees Cook <keescook@...omium.org>

Maybe it makes sense to mention in the commit log that for all three
merged cases there is a pr_emerg() message logged right before the
kmsg_dump(), thus the reason is distinguishable from the dmesg log
itself.

Reviewed-by: Pavel Tatashin <pasha.tatashin@...een.com>