linux-kernel - Re: [PATCH v3 7/9] KVM-GST: KVM Steal time accounting

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Message-ID: <1309470874.12449.610.camel@twins>
Date:	Thu, 30 Jun 2011 23:54:34 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Glauber Costa <glommer@...hat.com>
Cc:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Rik van Riel <riel@...hat.com>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	Avi Kivity <avi@...hat.com>,
	Anthony Liguori <aliguori@...ibm.com>,
	Eric B Munson <emunson@...bm.net>
Subject: Re: [PATCH v3 7/9] KVM-GST: KVM Steal time accounting

On Wed, 2011-06-29 at 11:29 -0400, Glauber Costa wrote:
> +static inline u64 steal_ticks(u64 steal)
> +{
> +       if (unlikely(steal > NSEC_PER_SEC))
> +               return steal / TICK_NSEC;

That won't compile on a number of 32bit architecture, use div_u64 or
something similar.

> +
> +       return __iter_div_u64_rem(steal, TICK_NSEC, &steal);
> +} 
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