linux-kernel - Re: [PATCH v2 4/6] KVM-GST: KVM Steal time registration

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Message-ID: <1296472297.15234.368.camel@laptop>
Date:	Mon, 31 Jan 2011 12:11:37 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Glauber Costa <glommer@...hat.com>
Cc:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	aliguori@...ibm.com, Rik van Riel <riel@...hat.com>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	Avi Kivity <avi@...hat.com>
Subject: Re: [PATCH v2 4/6] KVM-GST: KVM Steal time registration

On Fri, 2011-01-28 at 14:52 -0500, Glauber Costa wrote:
> +       /*
> +        * using nanoseconds introduces noise, which accumulates easily
> +        * leading to big steal time values. We want, however, to keep the
> +        * interface nanosecond-based for future-proofness. The hypervisor may
> +        * adopt a similar strategy, but we can't rely on that.
> +        */
> +       delta /= NSEC_PER_MSEC;
> +       delta *= NSEC_PER_MSEC; 

I really doubt that claim..

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