>>> On 02.01.18 at 15:17, <[email protected]> wrote: > x86's current implementation of wmb() is a compiler barrier. As a result, the > only change in this patch is to remove an mfence instruction from > cpuidle_disable_deep_cstate(). > > None of these barriers serve any purpose. They are not synchronising with > remote cpus, and their compiler-barrier properties are not needed for > correctness purposes. > > Furthermore, these wmb()'s specifically do not want to turn into sfence > instructions in future changes where wmb()'s implementation is corrected. > > Signed-off-by: Andrew Cooper <[email protected]>
Acked-by: Jan Beulich <[email protected]> _______________________________________________ Xen-devel mailing list [email protected] https://lists.xenproject.org/mailman/listinfo/xen-devel
