>>> On 02.01.18 at 15:17, <andrew.coop...@citrix.com> 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 <andrew.coop...@citrix.com>
Acked-by: Jan Beulich <jbeul...@suse.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
