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Re: [Xen-devel] [RFC] [PATCH] use "reliable" tsc properly when available

To: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, "Xen-Devel (E-mail)" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] [RFC] [PATCH] use "reliable" tsc properly when available, but verify
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Tue, 29 Sep 2009 19:21:01 +0100
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On 29/09/2009 19:10, "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx> wrote:

> I'd feel better running check_tsc_warp (at least) once
> on ALL processors, even if X86_FEATURE_TSC_RELIABLE
> is set.  Is that OK?  Or should we just trust it under
> exactly the same circumstances as Linux does?

Well, what does trusting it imply for us right now? Do you have another
patch in mind, even if we decide against check_tsc_warp?

I mean, I'm not unhappy with our TSC management code as it is. I'm not
greatly excited to mess with it yet again.

 -- Keir



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