On Wed, Sep 3, 2014 at 2:09 AM, Andrey Korolyov <and...@xdel.ru> wrote: > On Wed, Sep 3, 2014 at 1:51 AM, Michael S. Tsirkin <m...@redhat.com> wrote: >> On Wed, Sep 03, 2014 at 01:29:29AM +0400, Andrey Korolyov wrote: >>> On Wed, Sep 3, 2014 at 1:03 AM, Michael S. Tsirkin <m...@redhat.com> wrote: >>> >> bad one is the >>> >> >>> >> Author: Jason Wang <jasow...@redhat.com> >>> >> Date: Tue Sep 2 18:07:46 2014 +0300 >>> >> >>> >> vhost_net: start/stop guest notifiers properly >>> > >>> > >>> > >>> > upstream has this (pull request sent today): >>> > vhost_net: cleanup start/stop condition >>> > >>> > Could you apply it and see if it helps please? >>> > >>> > Michael, if it helps it should be before start/stop guest notifiers >>> > ideally to avoid bisect problems. >>> >>> It is already applied as shown from the list in the previous message >>> (there are some aio fixes too on top of 2.1 I picked before but they >>> should not impact vhost-net interaction in any mean). The symptoms are >>> a bit interesting - VM crashes only at PCI device initalization (e.g. >>> grub stage after reset and initrd unpacking are passing well, but then >>> things getting ugly). I am running 3.14 guest i686-pae kernel from >>> debian backports in guest, so it may be version-specific after all. If >>> it`ll be hard to reproduce, I can try 64bit, expecting same behavior. >>> Please find args in attached file. >> >> >> >> ok just to make sure - which tree do I clone exactly? >> > > https://github.com/mdroth/qemu.git stable-2.1-staging showing same > behavior for me with those patches
Forgot to mention important detail - I am playing with -mq now, so actually virtio-net working in a bit different way than it may expected (it also shown in args list from above, but someone may miss it): ... qemu-system-x86_64: unable to start vhost net: 95: falling back on userspace virtio qemu-system-x86_64: unable to start vhost net: 95: falling back on userspace virtio ...
