linux-kernel - Re: [PATCH v2] reboot: allow to specify reboot mode via sysfs

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Message-Id: <20201106143312.830f2a7410efcf397614b9d4@linux-foundation.org>
Date:   Fri, 6 Nov 2020 14:33:12 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Matteo Croce <mcroce@...ux.microsoft.com>
Cc:     linux-kernel@...r.kernel.org, Mike Rapoport <rppt@...nel.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Arnd Bergmann <arnd@...db.de>, Petr Mladek <pmladek@...e.com>,
        Pavel Tatashin <pasha.tatashin@...een.com>,
        Kees Cook <keescook@...omium.org>,
        Tyler Hicks <tyhicks@...ux.microsoft.com>
Subject: Re: [PATCH v2] reboot: allow to specify reboot mode via sysfs

On Fri,  6 Nov 2020 21:07:04 +0100 Matteo Croce <mcroce@...ux.microsoft.com> wrote:

> The kernel cmdline reboot= option offers some sort of control
> on how the reboot is issued.
> Add handles in sysfs to allow setting these reboot options, so they
> can be changed when the system is booted, other than at boot time.

Please include a description of why you believe the kernel needs this
feature.  Use cases, end-user benefits, etc.

We've survived this long without it - what changed?