From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=51806 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OztTi-0001bx-5Y for qemu-devel@nongnu.org; Sun, 26 Sep 2010 11:49:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OztTg-000648-OQ for qemu-devel@nongnu.org; Sun, 26 Sep 2010 11:49:26 -0400 Received: from mx1.redhat.com ([209.132.183.28]:62902) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OztTg-00063y-H5 for qemu-devel@nongnu.org; Sun, 26 Sep 2010 11:49:24 -0400 Date: Sun, 26 Sep 2010 17:43:24 +0200 From: "Michael S. Tsirkin" Message-ID: <20100926154324.GD21843@redhat.com> References: <20100922171832.GA28721@moo.pl> <4C9A3FAF.9090503@codemonkey.ws> <20100922182049.GA29263@moo.pl> <4C9A4C77.2080806@codemonkey.ws> <20100923140437.GA9256@moo.pl> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100923140437.GA9256@moo.pl> Subject: [Qemu-devel] Re: BUG - qdev - partial loss of network connectivity List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Leszek Urbanski Cc: qemu-devel@nongnu.org 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