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[Xen-devel] Re: [PATCH V2] passthrough: deliver IRQs even if VCPU#0 is h

To: Kouya Shimura <kouya@xxxxxxxxxxxxxx>
Subject: [Xen-devel] Re: [PATCH V2] passthrough: deliver IRQs even if VCPU#0 is halted
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Fri, 10 Jul 2009 10:38:23 +0100
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On 10/07/2009 10:27, "Kouya Shimura" <kouya@xxxxxxxxxxxxxx> wrote:

> Keir Fraser writes:
>> Just target the i8259_target, and don't bother with the MP efficiency
>> changes.
> Sure. Attached. kdump works fine with this patch.
> I was a little bit worried about i8259_target pointing the halted VCPU#0.

In your specific case it won't when it matters (kdump kernel comes up,
reprograms IO-APIC which fixes i8259_target, then brings up PCI layer).

Really I think some of that dirq assist stuff should be put in a tasklet.
But let's not worry about that now, and just patch it up this way.

 -- Keir

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