More details: pinging from within the guest gives ping: sendmsg: No buffer space available ping: sendmsg: No buffer space available ping: sendmsg: No buffer space available I verified that there are no processes using huge amounts of sockets (lsof -n | grep IPv | wc -l tells me there are 755 in use). I also tried disabling STP on the bridge (did not help). The mac address of the interface in the guest does not show up in the brctl showmacs br1 output. Currently the problem starts after not more than 5 minutes of uptime so it seems to get worse. No changes done, only the 10th reboot or so in the last couple of hours. The host has been up for 16 days. No messages in dmesg on the host and also not in the guest. It does not look as a memory usage problem: the guest has 5GB of ram free (it just started up) and swap is completely empty. 0.6GB of buffers. On Sun, Jul 21, 2013 at 02:57:57AM +0200, folkert wrote: > Hi, > > I have a guest system with 4 virtual networks, all virtio. > 3 of them connected to bridges, 1 to a virtual network. > Regularly (mostly once in a few days but last 2 days already 4 times) > one specific interface stops working. The only thing then that helps is > restarting the virtual machine. When this happens, every packet send out > increases the "dropped packets" counter in the guest. All other guests > using this bridge work fine, including the host itself. > I verified that it is not a firewall problem (disabled the iptables > script). > I did some googling and found the suggestion of installing vhost_net on > the host and the suggestion to use the e1000 emulation but both did not > help. This happens with 3.2, 3.8, 3.9 and 3.10 kernels in the guest. > Same thing for the host. > > pxe-qemu 1.0.0+git-20120202.f6840ba-3 > kvm 1:1.1.2+dfsg-6 > qemu 1.1.2+dfsg-6a > qemu-keymaps 1.1.2+dfsg-6a > qemu-kvm 1.1.2+dfsg-6 > qemu-system 1.1.2+dfsg-6a > qemu-user 1.1.2+dfsg-6a > qemu-utils 1.1.2+dfsg-6a > > Any ideas? > > > Folkert van Heusden > > -- > MultiTail is een flexibele tool voor het volgen van logfiles en > uitvoer van commando's. Filteren, van kleur voorzien, mergen, > 'diff-view', etc. http://www.vanheusden.com/multitail/ > ---------------------------------------------------------------------- > Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com Folkert van Heusden -- MultiTail na wan makriki wrokosani fu tan luku den logfile nanga san den commando spiti puru. Piki puru spesrutu sani, wroko nanga difrenti kroru, tya kon makandra, nanga wan lo moro. http://www.vanheusden.com/multitail/ ---------------------------------------------------------------------- Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com -- 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
