Re: [Xen-devel] Linux questions

["Jan Beulich" <jbeulich@xxxxxxxxxx>]

>>> Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx> 03.12.07 12:29 >>>
>Jan Beulich, le Mon 03 Dec 2007 11:24:35 +0000, a écrit :
>> 2) What is the reason for the inconsistent use of rmb() vs. barrier() in
>> time-xen.c? It would seem to me that rmb() should be sufficient in all
>> cases.
>
>rmb() is more powerful than barrier(), not the converse.

Oh, sorry, I mixed barrier() with mb(). So the proposal would then simply
be the other way around (the use of locked operations or fence instructions
on x86 is really unnecessary as long as WC memory or non-temporal stores
don't need to be taken into consideration).

Jan

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