Re: [libvirt] two hostdev devices problem

On 05/22/2013 06:32 PM, Dominik Mostowiec wrote: > > I tested on 1.0.5 patched version and vm with 2 vfs working fine. > > I have another problem > When i set max_vfs=63: > internal error missing IFLA_VF_INFO in netlink response > > Its working when max_vfs=31 > What is the platform, kernel version, and what version of libnl are you using (libnl 1 or libnl3?) There have been multiple bugs recently filed and fixed in this area on RHEL6/CentOS6. In particular, there was a problem with max_vfs > 50 that had exactly this symptom. It was solved by a patch to libnl-1.1. If your platform uses libnl-1.1, this could be the source of the problem. It is fixed in the upstream libnl-1.1.4 maintenance release. I unfortunately am not sure where the libnl-1.1 git is (I only have the git tree for libnl3), so I can't give you the exact commit message, but in short the problem was that libnl was using too small of a buffer for the netlink socket, so when there were a lot of vfs, the netlink message containing vf info was truncated. > -- > Dominik > > 21 maj 2013 15:19, "Dominik Mostowiec" <dominikmostowiec(a)gmail.com > <mailto:dominikmostowiec@gmail.com>> napisał(a): > > Hmm, > It seems to be working (after only simple tests). > > -- > Dominik > > > 2013/5/21 Ján Tomko <jtomko(a)redhat.com <mailto:jtomko@redhat.com>> > > On 05/21/2013 01:37 PM, Laine Stump wrote: > > On 05/21/2013 04:03 AM, Ján Tomko wrote: > >> On 05/21/2013 09:32 AM, Dominik Mostowiec wrote: > >>> hi, > >>> I try to add 2 VF by "hostdev". > >>> Networks (vnet0, vnet1) with: > >>> <forward mode='hostdev' managed='yes'> > >>> <pf dev='eth1'/> > >>> ..... > >>> > >>> Domain: > >>> <interface type="network"> > >>> <source network="vnet0"/> > >>> .... > >>> <interface type="network"> > >>> <source network="vnet1"/> > >>> .... > >>> > >>> virsh create error: > >>> "error: internal error process exited while connecting to > monitor: kvm: > >>> -device > pci-assign,configfd=25,host=01:10.1,id=hostdev0,bus=pci.0,addr=0x4: > >>> Duplicate ID 'hostdev0' for device" > >>> > >> Hi, > >> > >> it seems we have been assigning the same id to all network > hostdevs until this > >> recent commit (not yet released): > >> > >> http://libvirt.org/git/?p=libvirt.git;a=commitdiff;h=6597cc25 > > > > > > If that patch has such an effect, it's purely accidental. > Have you > > tested this? (I plan to test a before and after as soon as > I've had > > breakfast) > > > > I haven't tested it and looking at the code again, I might've > been wrong :( > > Sorry about that. > > Jan > > > > > > > -- > Pozdrawiam > Dominik >