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xen-devel
[Xen-devel] Re: [PATCH] x86: fix the potential of encountering panic "IO
* Jan Beulich <jbeulich@xxxxxxxxxx> wrote:
> >>> Ingo Molnar <mingo@xxxxxxx> 12.12.08 10:13 >>>
> >
> >* Jan Beulich <jbeulich@xxxxxxxxxx> wrote:
> >
> >> >From all I can tell, the below reproduced full description of the
> >> original Linux patch applies to Xen, too - at least in the watchdog
> >> enabled case IRQs can be enabled when entering setup_IO_APIC(). My
> >> attention to this change really got caught just by the fact that it got
> >> added to our (2.6.16-based) SLE10 kernel pretty recently.
> >
> >note that we had to revert that eventually. The real solution is an
> >array of fixes from Maciej spread out over many months.
>
> What do you mean by 'eventually'? 2.6.28-rc8 still has this code, and
> so does -tip.
argh. Different io-apic breakage. I shouldnt remember patches by their
subject lines ;-)
Sorry about the confusion - Jan is right and my fix ported to Xen is good
;-)
the point about the other breakages remains: for the best bootup ratio
you'll want to pick up everything from the (now unified)
arch/x86/kernel/io_apic.c.
Ingo
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