Re: System clock runs too fast after 2.6.27 -> 2.6.28.1 upgrade

[Robert Schwebel]

On Fri, Jan 23, 2009 at 05:36:30PM -0800, john stultz wrote:
> On Fri, Jan 23, 2009 at 3:04 AM, Ingo Molnar <mingo@xxxxxxx> wrote:
> > * john stultz <johnstul@xxxxxxxxxx> wrote:
> >> I'd think this would ideally be more of a subarch in the config
> >> selection like the AMD Elan is, so folks know it really is not just a
> >> extra-support feature and in fact limits what hardware you can use the
> >> resulting kernel on.
> >
> > a better solution is that if RDC is set [it is unset by default] we should
> > turn PIT_TICK_RATE into a variable, defaulting it to 1193182. If a real
> > RDC or ELAN system is running, that variable is changed during early
> > bootup, in the init functions for those platforms.
> 
> Took a quick look at this, and I don't see any detection code for
> either RDC. The X86_ELAN config also has no conditionals, but maybe
> the elan cpufreq code can help here.
> 
> Florian: Is there any way we can check very early (ie: in setup_arch)
> for an RDC box?
> 
> Robert Schwebel, Sven Geggus: Either of you still maintaining the ELAN
> code?  Will the following from elanfreq_cpu_init catch all ELAN chips?
> 
>         if ((c->x86_vendor != X86_VENDOR_AMD) ||
>             (c->x86 != 4) || (c->x86_model != 10))

Nope, I don't have systems available any more with the ELAN.

rsc
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