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Re: [Xen-devel] RE: [PATCH] rendezvous-based local time calibration WOW!

To: John Levon <levon@xxxxxxxxxxxxxxxxx>, Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
Subject: Re: [Xen-devel] RE: [PATCH] rendezvous-based local time calibration WOW!
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Mon, 11 Aug 2008 15:38:31 +0100
Cc: Ian Pratt <Ian.Pratt@xxxxxxxxxxxxx>, Nils Nieuwejaar <nils.nieuwejaar@xxxxxxxxx>, Dave Winchell <dwinchell@xxxxxxxxxxxxxxx>, "Xen-Devel \(E-mail\)" <xen-devel@xxxxxxxxxxxxxxxxxxx>
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On 11/8/08 15:37, "John Levon" <levon@xxxxxxxxxxxxxxxxx> wrote:

> It's only non-zero if we can indeed reschedule fast enough. If it's now
> below the threshold, then we can consider it effectively fixed. Only
> testing can really tell us that.

Depending on how critical this guarantee is, I wouldn't rely on Xen to
perform perfectly. Probably you should keep your lock.

 -- Keir

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