Re: [PATCH 0/8] watchdog: Add support for keepalives triggered by infrastructure

Uwe Kleine-König
2015-08-05T08:27:21Z

Hello Guenter,

On Wed, Aug 05, 2015 at 12:50:25AM -0700, Guenter Roeck wrote:
> On 08/05/2015 12:36 AM, Uwe Kleine-König wrote:
> >the watchdog I'm currently working with on a powerpc platform has a
> >unchangable timeout of ~1 s. To make the machine boot I patched the
> >bootloader and need some automatic pinging in the kernel before
> >userspace takes over.
> >
>
> Does using arch_initcall in the watchdog driver help here, or is that
> still too slow and you really need to hack the kernel ?

I didn't do any measurements yet, but having the bootloader extracting
the kernel, and then send a ping before jumping into it is good enough
even without CONFIG_GPIO_WATCHDOG_ARCH_INITCALL to get the machine up.
(Userspace doesn't do any watchdog handling yet.)

Best regards
Uwe

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