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[Qemu-devel] Re: BUG - qdev - partial loss of network connectivity
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] Re: BUG - qdev - partial loss of network connectivity |
Date: |
Sun, 26 Sep 2010 17:43:24 +0200 |
User-agent: |
Mutt/1.5.20 (2009-12-10) |
On Thu, Sep 23, 2010 at 04:04:37PM +0200, Leszek Urbanski wrote:
> <address@hidden>; from Anthony Liguori on Wed, Sep 22, 2010 at 13:35:35 -0500
>
> > >>Is the guest kernel vanilla 2.6.32.22 or is it a distro kernel? If the
> > >>later, what distro?
> > >>
> > >>The difference in the two invocations is that with the -device syntax,
> > >>you're getting offload features enabled.
> > >>
> > >It's vanilla 2.6.32.22, but I also reproduced this on Debian's 2.6.32-23
> > >(based on 2.6.32.21).
> > >
> > >If offload is the only difference, I'll play with different offload
> > >options and check which one causes it.
> > >
> >
> > It's not technically the only difference but it's the most likely
> > culprit IMHO.
>
> udp fragmentation offload is definitely the culprit.
I see. Most likely guest bug - won't be the first bug around UFO.
If so pls copy netdev linux-nfs and virtualization.
Do you see anything in dmesg? Can try 2.6.36-rc5?
> --
> Leszek "Tygrys" Urbanski, SCSA, SCNA
> "Unix-to-Unix Copy Program;" said PDP-1. "You will never find a more
> wretched hive of bugs and flamers. We must be cautious." -- DECWARS
> http://cygnus.moo.pl/ -- Cygnus High Altitude Balloon