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[Xen-devel] Re: [PATCH] Handle MSI irq storm


  • To: "Shan, Haitao" <haitao.shan@xxxxxxxxx>
  • From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
  • Date: Thu, 03 Jul 2008 14:17:37 +0100
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Thu, 03 Jul 2008 06:18:13 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: Acjcy8F+D4qxw0AnTb6V8UsSMvI8BwAGIrDfAABHUbAAAdev+QAIDYLgAACKzNs=
  • Thread-topic: [PATCH] Handle MSI irq storm

On 3/7/08 14:12, "Shan, Haitao" <haitao.shan@xxxxxxxxx> wrote:

> As I was writing the new patch, I had some other considerations.
> Concerning PV guests, we can depend on the event-channel-pending to decide
> whether we will set timer and rely on the timer to enable this vector some
> time later.
> So for HVM guest, can we also rely on the timer to enable this interrupt
> vector later? (so in hvm_eoi_function, we only unmark the IRQ_INPROGRESS
> without enable it.) Thus, the handling can be the same for both PV guests and
> HVM guests.
> How do you think of this scheme?

Yes, that's exactly what I was thinking.

 -- Keir



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