Hey Larry, It almost sounds like you are running out of memory, although I have never seen that libvirt error myself. Could you verify your VM's has enough memory?
Thanks, -Don Skidmore <[email protected]> > -----Original Message----- > From: laurence.schuler [mailto:[email protected]] > Sent: Wednesday, September 04, 2013 10:22 AM > To: Tantilov, Emil S > Cc: [email protected] > Subject: Re: [E1000-devel] Fwd: libvirt-qemu/kvm passthru w/Intel 82598EB > > Hi Emil, > > We are only using the 82598 with the dom1 hosts. They are running Centos > 2.6.18-348.12.1 kernel with an updated ixgbe driver v3.17.3 downloaded from > the Intel site. > > We have ixgbe blacklisted on dom0 which is running Centos6 2.6.32-358.18.1 > > I do see a lot of the messages like this in the libvirtd.log: > 23210: error : virNetlinkEventCallback:339 : nl_recv returned with > error: No buffer space available > but I could not find any info on what that might mean, or how to correct. > > We are seeing the error count increase on the interface (ifconfig eth1 & > ethtool -S) as the ping progresses, but no messages anywhere > > Thanks! > --Larry > > On 09/03/2013 06:14 PM, Tantilov, Emil S wrote: > >> -----Original Message----- > >> From: laurence.schuler [mailto:[email protected]] > >> Sent: Tuesday, September 03, 2013 1:36 PM > >> To: [email protected] > >> Subject: [E1000-devel] Fwd: libvirt-qemu/kvm passthru w/Intel 82598EB > >> > >> Hello, > >> > >> I am trying to configure two identical systems with the following > >> setup. > >> > >> dom0: Centos 6 OS on Apple Xserve i7 server with PCI cards for 4GB FC > >> (LSI FC949ES) and 10GB Ethernet (Intel 82598EB) > >> > >> dom1: Centos 5 OS with passthru mode of PCI 4GB FC and 10GB Ethernet > >> (ixgbe and mptfc blacklisted in dom0) > >> > >> Everything starts ok, but networking in dom1 using the 10GB interface > >> has extremely high rtt w/ping tests (20-30ms avg). > > From the description above it seems you are using 82598 interfaces in both > dom0 and dom1, but you only see the issue on dom1? If that is the case, are > you only seeing the issue when dom1 runs Centos 5? What if you run dom1 > with Centos 6? > > > > I am not aware of any known issues with respect to passthru mode with > qemu. The driver should see and use the network adapter as usual and there > should be no special adjustments needed. We can try to reproduce this > locally if you could provide some additional information such as the distros > and kernel version of the host OS and the kernel versions in the VMs. > > > > Another thing to look at are any errors or warnings in dmesg when you > bring the VMs up. Also for the failing interface it is worth taking a look at > the > stats while passing traffic via ethtool -S as this may give us an idea about > what > is causing the performance drop. > > > > Thanks, > > Emil > > > > > -- > Laurence Schuler (Larry) [email protected] > Systems Support ADNET Systems, Inc > Scientific Visualization Studio http://svs.gsfc.nasa.gov > NASA/Goddard Space Flight Center, Code 606.4 phone: 1-301-286-1799 > Greenbelt, MD 20771 fax: 1-301-286-1634 > Note: I am not a government employee and have no authority to obligate > any federal, state or local government to perform any action or payment. > > > ------------------------------------------------------------------------------ > Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! > Discover the easy way to master current and previous Microsoft technologies > and advance your career. Get an incredible 1,500+ hours of step-by-step > tutorial videos with LearnDevNow. Subscribe today and save! > http://pubads.g.doubleclick.net/gampad/clk?id=58040911&iu=/4140/ostg.clk > trk > _______________________________________________ > E1000-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/e1000-devel > To learn more about Intel® Ethernet, visit > http://communities.intel.com/community/wired ------------------------------------------------------------------------------ Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58041391&iu=/4140/ostg.clktrk _______________________________________________ E1000-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
