Re: [libvirt] virtio network problems with kvm guests with 2.6.26 kernel

2009-09-29 Thread Mark McLoughlin
On Tue, 2009-09-29 at 15:20 -0400, Jim Paris wrote: > Nevermind that, my conclusions were bogus. Things still didn't quite add > up, so I tracked down what's really going on here: > > - Libvirt 0.7.1 (as packaged by Debian) has IFF_VNET_HDR support. > - Qemu-kvm 0.11.0 (as built by myself) did N

Re: [libvirt] virtio network problems with kvm guests with 2.6.26 kernel

2009-09-29 Thread Jim Paris
Jim Paris wrote: > Daniel P. Berrange wrote: > > On Tue, Sep 29, 2009 at 02:39:59AM -0400, Jim Paris wrote: > > > Hi, > > > > > > After upgrading libvirt on one system, my kvm guests running a 2.6.26 > > > kernel with virtio networking could no longer communicate with the > > > network. > > > > >

Re: [libvirt] virtio network problems with kvm guests with 2.6.26 kernel

2009-09-29 Thread Jim Paris
Daniel P. Berrange wrote: > On Tue, Sep 29, 2009 at 02:39:59AM -0400, Jim Paris wrote: > > Hi, > > > > After upgrading libvirt on one system, my kvm guests running a 2.6.26 > > kernel with virtio networking could no longer communicate with the > > network. > > > > It seems that the problem is cau

Re: [libvirt] virtio network problems with kvm guests with 2.6.26 kernel

2009-09-29 Thread Daniel P. Berrange
On Tue, Sep 29, 2009 at 02:39:59AM -0400, Jim Paris wrote: > Hi, > > After upgrading libvirt on one system, my kvm guests running a 2.6.26 > kernel with virtio networking could no longer communicate with the > network. > > It seems that the problem is caused by newer libvirt versions > unconditio

[libvirt] virtio network problems with kvm guests with 2.6.26 kernel

2009-09-28 Thread Jim Paris
Hi, After upgrading libvirt on one system, my kvm guests running a 2.6.26 kernel with virtio networking could no longer communicate with the network. It seems that the problem is caused by newer libvirt versions unconditionally enabling GSO support by setting IFF_VNET_HDR [1]. However, support f