Re: [PATCH] bitops: add _local bitops

From: H. Peter Anvin
Date: Wed May 09 2012 - 12:46:23 EST

On 05/09/2012 09:36 AM, Michael S. Tsirkin wrote:
> Well it talks about a memory barrier, not an
> optimization barrier.

Same thing.

> If compiler reorders code, changes will appear in
> the wrong order on the current processor,
> not just on other processors, no?


For your _local I would just copy the atomic bitops but remote the locks
in most cases.


H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.

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