Subject: Re: [PATCH] vhost-net: switch to smp barriers

From: Avi Kivity <[email-masked]>
Date: Sun, 07 Feb 2010 11:42:29 +0200

On 02/01/2010 07:21 PM, Michael S. Tsirkin wrote:
> vhost-net only uses memory barriers to control SMP effects
> (communication with userspace potentially running on a different CPU),
> so it should use SMP barriers and not mandatory barriers for memory
> access ordering, as suggested by Documentation/memory-barriers.txt
>
>    

A UP guest running on an SMP host still needs those barriers.

-- 
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