Hi, At least two times a day one of the vms on my server loses all networking to 1 interface. This vm has 3 virtual interfaces connected to 3 bridges and 1 interface to a virtual network. Now one bridge-connection keeps falling of the network. The only thing that helps is rebooting the vm. I tried e1000 but that did not help at all. The other 3 VMs don't have this problem. No logging in the kernel logging (dmesg) and none in any other logfile. A ping from within that VM complains about "no buffer space available". I verified that at most 800 sockets are opened by +/- 100 processes. This setup had previously running fine for years on real hardware. This happens with 3.2, 3.8, 3.9 and 3.10 in both the host as well as the guest.
When this problems 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. 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 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. It is not likely to be a memory problem as the guest vm has 5.5GB out of 8GB of free ram (free, not buffers). The host system has 16GB free ram. Last night the problem happened in 5 minutens. Then after I rebooted the host(!) it was fine for half a day but then it got back again. -- www.vanheusden.com -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
