On Sat, 2011-05-07 at 16:47 +0200, Ingo Molnar wrote: > Can you anything in the virtio protocol implementation that would explain > networking lags, which seem to be caused by guest notifications either not be > sent or being missed? > > In particular this sequence: > > > while pending_requests: > > a = get_next_request(); > > process_next_request(a); > > is apparently not what Qemu uses - so maybe there's some latent bug or some > silly oversight somewhere. > > It is suboptimal and i agree with you that the better sequence should be > implemented, but the above *should* work, yet it does not. Yes, so the performance benefits of Asias' patch aren't the interesting part but the fact that it fixes a real bug in our tool. Pekka -- 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
