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Re: [Qemu-devel] [PATCH 04/30] add a header file for atomic operations
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] [PATCH 04/30] add a header file for atomic operations |
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Date: |
Mon, 01 Jul 2013 15:04:43 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130514 Thunderbird/17.0.6 |
Il 01/07/2013 15:00, Anthony Liguori ha scritto:
>> I
>> > cannot find the commit exactly, but I think mst added specific code for
>> > that.
> Right, I'm not questioning whether these functions have strong enough
> semantics in their implementation, but asking what their contract should
> be.
>
> Either we should document that these functions have atomic semantics or
> we should introduce another variant that guarantee atomic access.
>
> I think the later makes more sense since the majority of users probably
> don't need atomic semantics.
I think many of these loads and stores do, actually; perhaps most. It
also matches what hardware does.
Paolo