On Thu, Dec 17, 2015 at 04:34:57PM +0200, Michael S. Tsirkin wrote: > On Thu, Dec 17, 2015 at 03:02:12PM +0100, Peter Zijlstra wrote: > > > commit 9e1a27ea42691429e31f158cce6fc61bc79bb2e9 > > > Author: Alexander Duyck <alexander.h.duyck@xxxxxxxxxx> > > > Date: Mon Apr 13 21:03:49 2015 +0930 > > > > > > virtio_ring: Update weak barriers to use dma_wmb/rmb > > > > That commit doesn't make any sense. dma_*mb() explicitly does _NOT_ > > cover the smp_*mb() part. > > > > Again, look at the ARM definitions, the smp_*mb() primitives use the > > inner coherence stuff, while the dma_*mb() primitives use the outer > > coherent stuff. > > Does outer coherent imply inner coherent? > > > the *mb() primitives cover both. I do not think so, but lets add Will, he dreams this stuff. _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
