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Re: [Xen-devel] RE: [PATCH] Don't free irqaction for com irq when releas

from [Jan Beulich] [Permanent Link][Original]
To: "Christoph Egger" <Christoph.Egger@xxxxxxx>
Subject: Re: [Xen-devel] RE: [PATCH] Don't free irqaction for com irq when release irq.
From: "Jan Beulich" <JBeulich@xxxxxxxxxx>
Date: Thu, 03 Sep 2009 11:20:31 +0100
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, Xiantao Zhang <xiantao.zhang@xxxxxxxxx>
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>>> Christoph Egger <Christoph.Egger@xxxxxxx> 03.09.09 12:04 >>>
>On Thursday 03 September 2009 11:38:35 Zhang, Xiantao wrote:
>> No, host S3 issue is caused by ioapic suspend/resume in dom0.  IMO, dom0
>> shouldn't perform S3 for ioapic , right ?
>
>dom0 initializes and programs ioapic. In short: ioapic is under control of 
>dom0. Please explain why dom0 shouldn't do ioapic suspend/resume.

Because Xen itself does so (and has to for its own interrupts to work).

Jan


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