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[Xen-devel] RE: [PATCH] clocksource=tsc

To: "dan.magenheimer@xxxxxxxxxx" <dan.magenheimer@xxxxxxxxxx>, "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx>, "Xen-Devel (E-mail)" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-devel] RE: [PATCH] clocksource=tsc
From: "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx>
Date: Tue, 15 Jul 2008 10:04:03 -0600
Cc: Dave Winchell <dwinchell@xxxxxxxxxxxxxxx>
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Hmmm... 18055 also fails to boot on my machine.

Could we perhaps fall back to my original patch and do
cleanup later/separately?  I also want to try implementing
an hpet64-based get_s_time() so will be working more
in this code later... but want to get clocksource=tsc
working now with minimal code impact given the freeze.

> -----Original Message-----
> From: Dan Magenheimer [mailto:dan.magenheimer@xxxxxxxxxx]
> Sent: Tuesday, July 15, 2008 9:46 AM
> To: 'Keir Fraser'; 'Xen-Devel (E-mail)'
> Cc: 'Dave Winchell'
> Subject: RE: [PATCH] clocksource=tsc
> 
> > Actually in this mode of operation we hardly need a platform 
> > timer *at all*.
> > The idea is that we let the TSCs free-run, because we know 
> > they will behave.
> > Returning to 32-bit read_counter(), and having NULL 
> read_counter when
> > clocksource=tsc would be another possibility...
> 
> That's essentially what the original tscstable.patch did, though
> I was perhaps much uglier in the miscellaneous parts.
> 
> Thanks,
> Dan
>


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