Subject: Re: [PATCH] 2.6 timebase synchronization

From: Samuel Rydh <[email-masked]>
Date: Sun, 10 Aug 2003 23:29:42 +0200

On Sun, Aug 10, 2003 at 11:39:08AM +0200, Benjamin Herrenschmidt wrote:
>
> On Sun, 2003-08-10 at 04:09, Paul Mackerras wrote:
> > Samuel Rydh writes:
> >
> > > Attached is an improved version of the patch.
> >
> > How many SMP machines are there where we don't know how to freeze/thaw
> > the timebase?  We know how to do that on the old powersurge powermacs,
> > on CHRP systems and on at least some of the recent core99 powermacs
> > (those that have a timebase-enable property on the cpu device nodes).
> > What machines are left?
>
> We know how to do it on some core99, though we don't actually do it
> yet ;) We use software sync on all core99 for now.

Btw, the freeze/thaw timebase setting that is done on psurge is lost
since the generic timebase calibration mechanism is still invoked
afterwards (and at that time, the timebases are ticking).

/Samuel

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