linux-kernel - Re: [v6,3/3] watchdog: introduce CONFIG_WATCHDOG_OPEN

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Date:   Tue, 11 Jul 2017 17:50:33 +0200
From:   Wim Van Sebroeck <wim@...ana.be>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Rasmus Villemoes <rasmus.villemoes@...vas.dk>,
        Jonathan Corbet <corbet@....net>,
        Sebastian Reichel <sebastian.reichel@...labora.co.uk>,
        esben.haabendal@...il.com, Alan Cox <gnomes@...rguk.ukuu.org.uk>,
        linux-watchdog@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [v6,3/3] watchdog: introduce CONFIG_WATCHDOG_OPEN_TIMEOUT

Hi Guenter,

> > This allows setting a default value for the watchdog.open_timeout
> > commandline parameter via Kconfig.
> > 
> > Some BSPs allow remote updating of the kernel image and root file
> > system, but updating the bootloader requires physical access. Hence, if
> > one has a firmware update that requires relaxing the
> > watchdog.open_timeout a little, the value used must be baked into the
> > kernel image itself and cannot come from the u-boot environment via the
> > kernel command line.
> > 
> > Being able to set the initial value in .config doesn't change the fact
> > that the value on the command line, if present, takes precedence, and is
> > of course immensely useful for development purposes while one has
> > console acccess, as well as usable in the cases where one can make a
> > permanent update of the kernel command line.
> > 
> > Signed-off-by: Rasmus Villemoes <rasmus.villemoes@...vas.dk>
> 
> Wim, any thoughts on making this configurable ? I used to be opposed to it,
> but it does seem to make some sense to me now after thinking about it.

I will look at it later this week.

Kind regards,
Wim.