linux-kernel - Re: [PATCH 1/2] keep guest wallclock in sync with host clock

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Date:	Wed, 02 Sep 2009 15:56:16 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Glauber Costa <glommer@...hat.com>
CC:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] keep guest wallclock in sync with host clock

On 09/02/2009 03:48 PM, Glauber Costa wrote:
>
>> You can't prevent host preemption.  You might read kvmclock again and
>> repeat if too much time has passed.
>>      
> But then you can be scheduled after you did settimeofday, but before reading
> kvmclock again. Since we're aiming for periodic adjustments here,
> any discrepancies should not last long, so we can maybe live with it.
>    

do {
     read_kvmclock
     settimeofday
     read_kvmclock
} while the_difference_between_the_two_reads_is_too_large


-- 
error compiling committee.c: too many arguments to function

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