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From: "Michael S. Tsirkin" <mst@redhat.com>
To: Leszek Urbanski <tygrys@moo.pl>
Cc: qemu-devel@nongnu.org
Subject: [Qemu-devel] Re: BUG - qdev - partial loss of network connectivity
Date: Sun, 26 Sep 2010 17:43:24 +0200	[thread overview]
Message-ID: <20100926154324.GD21843@redhat.com> (raw)
In-Reply-To: <20100923140437.GA9256@moo.pl>

On Thu, Sep 23, 2010 at 04:04:37PM +0200, Leszek Urbanski wrote:
> <4C9A4C77.2080806@codemonkey.ws>; 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

  reply	other threads:[~2010-09-26 15:49 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-09-22 17:18 [Qemu-devel] BUG - qdev - partial loss of network connectivity Leszek Urbanski
2010-09-22 17:41 ` Anthony Liguori
2010-09-22 18:20   ` Leszek Urbanski
2010-09-22 18:35     ` Anthony Liguori
2010-09-23 14:04       ` Leszek Urbanski
2010-09-26 15:43         ` Michael S. Tsirkin [this message]
2010-09-27 21:32           ` Leszek Urbanski
2010-09-27 21:32             ` [Qemu-devel] " Leszek Urbanski
2010-09-27 21:32             ` Leszek Urbanski
2010-09-28  9:50             ` Michael S. Tsirkin
2010-09-28  9:50             ` Michael S. Tsirkin
2010-09-28  9:50               ` [Qemu-devel] " Michael S. Tsirkin
2010-09-28  9:50               ` Michael S. Tsirkin
     [not found]             ` <20100927213203.GA28089-4cL5GMJPxME@public.gmane.org>
2010-10-05 21:29               ` Leszek Urbanski
2010-10-05 21:29                 ` [Qemu-devel] " Leszek Urbanski
2010-10-05 21:29                 ` Leszek Urbanski
2010-10-05 21:29             ` Leszek Urbanski
2010-09-27 21:32           ` Leszek Urbanski

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