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Re: [Xen-devel] Re: [PATCH] x86: fix the potential of encountering panic

To: Ingo Molnar <mingo@xxxxxxx>
Subject: Re: [Xen-devel] Re: [PATCH] x86: fix the potential of encountering panic "IO-APIC + timer doesn't work! ..."
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Fri, 12 Dec 2008 09:37:15 +0000
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On 12/12/2008 09:24, "Ingo Molnar" <mingo@xxxxxxx> wrote:

>>> note that we had to revert that eventually. The real solution is an
>>> array of fixes from Maciej spread out over many months.
>> 
>> Does it do more harm than good on some systems, or is it simply not a
>> comprehensive fix?
> 
> more harm than good - fixes some, breaks others. Have a look at the
> latest upstream io_apic.c, that has it all settled down reasonably well.

Thanks, Ingo.

Jan: Do you agree we should revert the io_apic.c changes, but keep your
addition of an explicit local_irq_enable() to __start_xen()?

 -- Keir



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