Hardware Watchdog Device in pSeries?
arnd at arndb.de
Thu Oct 14 21:35:13 EST 2004
On Middeweken 13 Oktober 2004 21:23, Linas Vepstas wrote:
> On Wed, Oct 13, 2004 at 12:01:45PM -0600, Alan Robertson was heard to remark:
> > This would be a logical equivalent to the well-known and long-standing
> > 'softdog' device driver which already has a well-known API, which is also
> > implemented on other hardware devices and architectures.
> > So, my suggestion would be that if it were moved to a userspace driver,
> > that the softdog API be retained.
> I might have volunteered to hack this up real quick, were it not for
> Mike Strosaker's correction, that the surveillance featues were taken
> out of Power5.
FWIW, s390 linux has just added support for a hypervisor watchdog 
that looks like a hardware watchdog to linux, but is implemented with
hypercalls ("diag 0x288"). Since Power5 is typically running in hypervisor
more, the watchdog interface could be provided completely by the
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