On 05/18/2010 04:19 AM, Michael S. Tsirkin wrote: > With PUBLISH_USED_IDX, guest tells us which used entries > it has consumed. This can be used to reduce the number > of interrupts: after we write a used entry, if the guest has not yet > consumed the previous entry, or if the guest has already consumed the > new entry, we do not need to interrupt. > This imporves bandwidth by 30% under some workflows. > > Signed-off-by: Michael S. Tsirkin<mst@xxxxxxxxxx> > --- > > Rusty, Dave, this patch depends on the patch > "virtio: put last seen used index into ring itself" > which is currently destined at Rusty's tree. > Rusty, if you are taking that one for 2.6.35, please > take this one as well. > Dave, any objections? > I object: I think the index should have its own cacheline, and that it should be documented before merging. -- Do not meddle in the internals of kernels, for they are subtle and quick to panic. _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
