On Wed, Jan 27, 2016 at 03:14:09PM +0100, Peter Zijlstra wrote: > On Wed, Jan 27, 2016 at 04:07:56PM +0200, Michael S. Tsirkin wrote: > > mwait_idle is the only one that calls smp_mb and not mb() > > I couldn't figure out why - original patches did mb() > > there. > > That probably wants changing. That said, running UP kernels on affected > hardware is 'unlikely' :-)
OK that's nice. After changing that one place, everyone calls mb() around clflush so it should be safe to change smp_mb away from mfence without breaking things. I'm testing v4 that does this. -- MST
