Re: lapic fixes & xen impact

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Tue, May 19, 2020 at 10:46:18PM +0000, Andrew Doran wrote:
> I have a fix for the lapic timer to calibrate it properly, which applies to
> native x86 only however there is a xen-related impact.
> 
> 	http://www.netbsd.org/~ad/2020/lapic.diff
> 
> With some recent changes for xen it looks like the clocks on x86 were being
> started at CPU attach and initialized twice in one case.  However the clocks
> on each CPU should be started during the second interrupts-on part of
> autoconf (boot cpu) and at the end of cpu hatch (secondary cpus), i.e. when
> initclocks() is called.
> 
> Other than booting and checking a dom0 and multi-cpu domU with the change is
> there anything else specific I should check?

Please check with both pv and pvh domUs. cpu init is not the same.


-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--