[Qemu-devel] Fwd: [Qemu-stable] connectivity problem with Windows 7 + heavy network-traffic

[Qemu-devel] Fwd: [Qemu-stable] connectivity problem with Windows 7 + heavy network-traffic

[Oliver Francke]

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Hi Stefan,

thanks for your attention. See all infos below including complete 
command-line.

Thnx,

Oliver.


-------- Original Message --------
Subject: 	[Qemu-stable] connectivity problem with Windows 7 + heavy 
network-traffic
Date: 	Wed, 08 May 2013 10:04:19 +0200
From: 	Oliver Francke <Oliver.Francke@filoo.de>
To: 	qemu-stable@nongnu.org <qemu-stable@nongnu.org>



Hi,

I have a couple of reports vom people, where the network-link goes down.
I did some live-migration, and the RTL8139 card was connected again, up
to the next traffic-burst.
( just cmd, one ftp download + two uploads parallel... let it run for
couple of minutes until drop...)

No way within windows to recover the card except reboot.

All is fine with qem-1.2.0, I have no problem to make some exceptions
for these VM's, but cool would
be some possibility to narrow down the problem, which is there in
qemu-1.3.x up to 1.5.0-rc0.

The host is for example an AMD opteron 6172 ( 24 cores).
Switch is openvswitch-1.9.x, nothing special.

Here my call to qemu:

/usr/local/qemu-1.5.0/bin/qemu-system-x86_64 -usbdevice tablet
-enable-kvm -daemonize -pidfile /var/run/qemu-server/761.pid -monitor
unix:/var/run/qemu-server/761.mon,server,nowait -vnc
unix:/var/run/qemu-server/761.vnc,password -qmp
unix:/var/run/qemu-server/761.qmp,server,nowait -nodefaults -serial none
-parallel none -device rtl8139,mac=00:F1:70:00:2F:90,netdev=vlan0d0
-netdev
type=tap,id=vlan0d0,ifname=tap761i0d0,script=/etc/fcms/add_if.sh,downscript=/etc/fcms/downscript.sh
-name 1155823384-4 -m 2048 -vga cirrus -k de -smp sockets=1,cores=2
-device virtio-blk-pci,drive=virtio0 -drive
format=raw,file=rbd:1155823384/vm-761-disk-1.rbd:rbd_cache=false,cache=writeback,if=none,id=virtio0,media=disk,index=0
-drive
format=raw,file=rbd:1155823384/vm-761-swap-1.rbd:rbd_cache=false,cache=writeback,if=virtio,media=disk,index=1
-drive if=ide,media=cdrom,id=ide1-cd0 -drive
if=ide,media=cdrom,id=ide1-cd1 -rtc base=localtime -no-hpet -bootorder=dc

No problems whatsoever with all Linux-distros ( running hundreds of
them). I left out the -rtc and -no-hpet, not any better.

Any comments and help welcome,

Oliver.

-- 

Oliver Francke

filoo GmbH
Moltkestraße 25a
33330 Gütersloh
HRB4355 AG Gütersloh

Geschäftsführer: S.Grewing | J.Rehpöhler | C.Kunz

Folgen Sie uns auf Twitter: http://twitter.com/filoogmbh





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Re: [Qemu-devel] Fwd: [Qemu-stable] connectivity problem with Windows 7 + heavy network-traffic

[Stefan Hajnoczi]

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On Wed, May 22, 2013 at 11:27 AM, Oliver Francke <Oliver.Francke@filoo.de>wrote:

>  Hi Stefan,
>
> thanks for your attention. See all infos below including complete
> command-line.
>

Hi Oliver,
I just sent a fix for qemu.git/master.  If you need to backport it, replace
qemu_get_queue(s->nic) with &s->nic->nc.

Please let me know if the fix solves the issue for you.

Thanks,
Stefan

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