On Sun, Jan 31, 2016 at 12:12 PM, Michael S. Tsirkin <mst@xxxxxxxxxx> wrote: > On Thu, Jan 28, 2016 at 06:31:13PM -0800, Andy Lutomirski wrote: >> This switches virtio to use the DMA API on Xen and if requested by >> module option. >> >> This fixes virtio on Xen, and it should break anything because it's >> off by default on everything except Xen PV on x86. >> >> To the Xen people: is this okay? If it doesn't work on other Xen >> variants (PVH? HVM?), can you submit follow-up patches to fix it? >> >> To everyone else: we've waffled on this for way too long. I think >> we should to get DMA API implementation in with a conservative >> policy like this rather than waiting until we achieve perfection. >> I'm tired of carrying these patches around. > > I agree, thanks for working on this! > >> Michael, if these survive review, can you stage these in your tree? > > Yes, I'll stage everything except 10/10. I'd rather not maintain a > module option like this, things work for now and I'm working on a > clean solution for things like dpdk within guest. The module option was mainly for testing, but patching in a "return true" works just as well. I ran the code through the DMA API debugging stuff and swiotlb=force with the module option set under KVM (no Xen), and everything seemed to work. --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
