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Re: [Xen-devel] Re: [XenPPC] Re: IRQs delivery.

from [Tristan Gingold] [Permanent Link][Original]
To: Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Re: [XenPPC] Re: IRQs delivery.
From: Tristan Gingold <Tristan.Gingold@xxxxxxxx>
Date: Tue, 14 Mar 2006 09:27:49 +0100
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Le Lundi 13 Mars 2006 21:44, Jimi Xenidis a écrit :
> On Mar 13, 2006, at 3:41 AM, Tristan Gingold wrote:
> > I don't see any fairness or latency problems [except when we are
> > dealing with
> > event channel].
>
> Problem exists:
> If you defer the delivery of an IO interrupt because the VCPU is
> masking them
> --and--
> If the domain can unmask interrupts without the hypervisor knowing
Sure, but this cannot happen on ia64 since masking/unmasking interrupts is a 
privilegied operation which is always trapped.

Tristan.


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