On Tue, 2011-05-17 at 18:28 +0300, Michael S. Tsirkin wrote: > Which is the order the descriptors are put on avail ring. > By design, guest should not depend on used ring entries > being in order with avail ring (and btw with virtio block, > they aren't). If it does, it's a bug I think. Ok, I thought, the order should be maintained. > > The original code has no problem, because it gets one head and pass > that > > head to vhost_add_used one by one once done the copy. So it's in > > sequence. > > > > This issue can easily recreate without zerocopy patch by simply > changing > > the order from "head return vhost_get_vq_desc" when passing to > > vhost_add_used. > > > > Thanks > > Shirley > > Ah, did you try that? Could you post this patch pls? > This seems to imply a bug in guest virtio. I am creating the patch against net-next for you to test today. Thanks Shirley -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
