[Skiboot] [PATCH 3/3] ipmi/wdt: Add ipmi watchdog timer support

Benjamin Herrenschmidt benh at au1.ibm.com
Thu Jan 29 16:08:12 AEDT 2015

On Thu, 2015-01-29 at 12:59 +0800, Jeremy Kerr wrote:
> Hi Ben,
> > Or we just set the pre-timeout interrupt always and use it as the
> > watchdog tickle.
> The downside here is that we'd then have a periodic IPMI transaction,
> which may introduce jitter. I'd prefer to leave it up to the OS to
> enable - there's the IPMI watchdog in the kernel, which is capable of
> handling this.
> The downside is that the watchdog won't "watch" the period between OPAL
> platform init (where we handle the first interrupt) and watchdog driver
> init, but I think that's a reasonable compromise.

I'm not sure ... the watchdog driver init will typically be in the
initramfs or root disk, lots of things can go wrong...


> Cheers,
> Jeremy

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