On 04/08/2011 08:42 AM, Jan Beulich wrote:
>>>> On 08.04.11 at 17:25, Jeremy Fitzhardinge <[email protected]> wrote:
>> On 04/07/2011 11:38 PM, Ian Campbell wrote:
>>> Is there any downside to this patch (is X86_CMPXCHG in the same sort of
>>> boat?)
>> Only if we don't use cmpxchg in shared memory with other domains or the
>> hypervisor. (I don't think it will dynamically switch between real and
>> emulated cmpxchg depending on availability.)
> Actually it does - see the "#ifndef CONFIG_X86_CMPXCHG" section
> in asm/cmpxchg_32.h.
Hm, OK. Still, I'm happiest with that dependency in case someone
knobbles the cpu to exclude cmpxchg and breaks things.
J
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