Thanks David, Yes, I am using rtl8139 and it is running 2.6.18-53.1.13.el5 (Red Hat kernel, CentOS).
ethtool -S eth0 on the guest says, when locked up: NIC statistics: early_rx: 0 tx_buf_mapped: 0 tx_timeouts: 4 rx_lost_in_ring: 0 It appears that 'noapic' did the trick, which is great, thanks! I am somewhat worried I'll be missing out on some SMP performance? But that's secondary. Please let me know if there is anything I can do to gather any more info to help debug the problem. -Arne david ahern wrote: > I presume you are using the default rtl8139 nic. Correct? > > What does 'ethtool -S eth0' show when the network locks up? Many months ago > adding 'noapic' to the (guest) kernel boot parameters helped, but that option > is > not currently helping with my RHEL4 networking issues. > > A thread for this issue is at: > http://sourceforge.net/tracker/index.php?func=detail&aid=1802082&group_id=180599&atid=893831 > > david > > > Arne Kepp wrote: > >> Hi, >> >> I am running KVM 61 on CentOS 5.1 x86_64 (on a Dell PowerEdge 2950 >> III). I start my virtual machine as follows: >> qemu-kvm -hda /dev/kvm_sdb/geust_root -m 1024 -net tap -net >> nic,vlan=0,macaddr=00:16:3e:00:00:02 -daemonize -nographic -smp 2 >> >> The problem is that when the guest (also CentOS 5.1 x86_64) utilizes the >> network heavily (scp to a machine on the same switch, around 12 mbyte/s) >> the network on the virtual machine just drops out. >> >> I can no longer ping the virtual machine, and any existing SSH sessions >> die. If I connect to the virtual machine using VNC everything looks okay >> (eth0 is up, routes are okay), but I still cannot connect to anything. >> All other virtual machines on the same host continue to work as if >> nothing has happened. The same problem occurred in -58 and -59. >> >> /var/log/messages on the guest says: >> NETDEV WATCHDOG: eth0: transmit timed out >> eth0: link up, 100Mbps, full-duplex, lpa 0x05E1 >> >> Any suggestions (permanent fixes or temporary workarounds, I'll take >> what you got) would be much appreciated. >> >> Thanks for all the great work :) >> -Arne >> >> ------------------------------------------------------------------------- >> This SF.net email is sponsored by: Microsoft >> Defy all challenges. Microsoft(R) Visual Studio 2008. >> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ >> _______________________________________________ >> kvm-devel mailing list >> kvm-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/kvm-devel >> >> > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > kvm-devel mailing list > kvm-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/kvm-devel > > !DSPAM:4038,47c22d43155652085621377! > > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
