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Re: [Xen-devel] Atomic operations

To: Juergen Gross <juergen.gross@xxxxxxxxxxxxxxxxxxx>
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Thu, 26 Mar 2009 07:50:27 +0000
Cc: Timothy Hayes <hayesti@xxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Delivery-date: Thu, 26 Mar 2009 00:50:53 -0700
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
Thread-index: Acmt5Ur5OB7gixOJTuiG67CamXL7AwAAjv5D
Thread-topic: [Xen-devel] Atomic operations

On 26/03/2009 07:34, "Juergen Gross" <juergen.gross@xxxxxxxxxxxxxxxxxxx>
wrote:

> Keir Fraser wrote:
>> The Linux atomic.h operations will be atomic even across domains.
> 
> ... unless CONFIG_SMP was not defined in the domU kernel build.

Yes, good point. Actually I assumed the OP was copying atomic.h for his own
use, but he probably isn't actually. And either way the CONFIG_SMP ifdef'ery
could bite.

 -- Keir

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