Re: Loss of network connectivity with high load

[Daniel Bareiro <daniel-listas@gmx.net>]

[-- Attachment #1: Type: text/plain, Size: 2460 bytes --]

Hi, Brian.

On Tuesday, 15 June 2010 16:13:03 -0500,
Brian Jackson wrote:

> > I'm using Linux 2.6.31.13 compiled with the kernel.org source code
> > on KVM host with Debian GNU/Linux Lenny amd64. Also I'm using Debian
> > GNU/Linux Lenny amd64 virtual machine with kernel 2.6.26-2 from
> > Debian repositories. I'm using qemu-kvm 0.12.3.
> > 
> > These are the parameters I'm using to start the virtual machine:
> > 
> > 
> > escher:~# ps ax|grep kvm
> >  6299 ?        Rl   113:40 /usr/local/qemu-kvm/bin/qemu-system-x86_64
> > -drive file=/dev/vm/belvedere-raiz,cache=none,if=virtio,boot=on -drive
> > file=/dev/vm/belvedere-u01,cache=none,if=virtio -drive
> > file=/dev/vm/belvedere-u02,cache=none,if=virtio -drive
> > file=/dev/vm/belvedere-u03,cache=none,if=virtio -drive
> > file=/dev/vm/belvedere-u04,cache=none,if=virtio -drive
> > file=/dev/vm/belvedere-u05,cache=none,if=virtio -drive
> > file=/dev/vm/belvedere-u06,cache=none,if=virtio -drive
> > file=/dev/vm/belvedere-u07,cache=none,if=virtio -drive
> > file=/dev/vm/belvedere-u08,cache=none,if=virtio -drive
> > file=/dev/vm/belvedere-u09,cache=none,if=virtio -m 3072 -smp 2 -net
> > nic,model=virtio,macaddr=00:16:3e:00:00:56 -net tap -daemonize -vnc :2
> > -k es -localtime -monitor telnet:localhost:4002,server,nowait -serial
> > telnet:localhost:4042,server,nowait
> > 
> > 
> > When I try to copy directories of several gigabytes in this VM using
> > rsync to other hosts, this virtual machine loses connectivity with
> > the rest of the network. Checking, using a serial console
> > connection, /var/log/syslog and /var/log/messages in search of the
> > problem, I don't see information that might give a clue to the
> > problem.
> > 
> > This problem is not with the network driver by default (rtl8139), so
> > I think that should be something related to Virtio.

> There have been a few bugs similar to this reported that should be
> pretty easy to find. Basically, I'd say try 0.12.4, it should have a
> few fixes in this area over 0.12.3.

I was testing with qemu-kvm 0.12.4 but I'm having the same problem. I
re-read the announce about qemu-kvm 0.12.4 sent by Avi, but I didn't
find in it some reference about fixes related to Virtio.

If there's anything else I can try, please tell me.

Regards,
Daniel
-- 
Fingerprint: BFB3 08D6 B4D1 31B2 72B9  29CE 6696 BF1B 14E6 1D37
Powered by Debian GNU/Linux Lenny - Linux user #188.598

[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 197 bytes --]