From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir@xensource.com>
Subject: Re: [Patch] Fix the slow wall clock time issue in x64
	SMP Vista
Date: Wed, 10 Jan 2007 12:02:05 +0000
Message-ID: <C1CA863D.7671%keir@xensource.com>
References: <666CC8FCE3247C4DA876BA979059781A5C288A@pdsmsx401.ccr.corp.intel.com>
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To: "Cui, Dexuan" <dexuan.cui@intel.com>, Keir Fraser <keir@xensource.com>, xen-devel@lists.xensource.com
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On 10/1/07 11:53, "Cui, Dexuan" <dexuan.cui@intel.com> wrote:

> 1) I made the change mainly for timer1 of HPET. Actually I don't know exactly
> how x64 SMP Vista uses HPET's timer1 to adjust the wall clock time; but
> without the patch, HPET's timer1 can generate and inject interrupts with a
> frequency of 20KHz or so! and the wall clock time would become slow.

I cannot see the logic behind the change though. If the guest has set up a
timeout, and the timeout is in the past, it makes sense to deliver
immediately.

 -- Keir