On Fri, 2011-04-29 at 10:55 +0300, Pekka Enberg wrote: > On Fri, Apr 29, 2011 at 10:26 AM, Asias He <asias.hejun@xxxxxxxxx> wrote: > >> Yes, looks strange. Asias, did you see some bad behavior that this > >> fixes? > > > > Yes. I see random virtio net hangs with scp test. This commit > > 847838c573f4c04be7547f508a99be2dfdefb4fd triggers this problem as we are > > using separte irq lines for each virtio devices instead of sharing one > > irq line for all virtio devices. > > That's interesting. So reverting that commit makes the hangs go away? I was able to reproduce the hang by running 'ping -f' from the guest to the host and from the host to the guest. >From debugging I found that virtio-net's VIRTIO_PCI_QUEUE_NOTIFY doesn't get called once it's hung. The hang does seems to go away once I revert 847838c573f4c04be7547f508a99be2dfdefb4fd . -- Sasha. -- 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
