From: "Michael S. Tsirkin" <mst@redhat.com>
To: Leszek Urbanski <tygrys@moo.pl>
Cc: Anthony Liguori <anthony@codemonkey.ws>,
qemu-devel@nongnu.org, netdev@vger.kernel.org,
linux-nfs@vger.kernel.org,
virtualization@lists.linux-foundation.org
Subject: Re: BUG - qdev - partial loss of network connectivity
Date: Tue, 28 Sep 2010 11:50:58 +0200 [thread overview]
Message-ID: <20100928095058.GI12472@redhat.com> (raw)
In-Reply-To: <20100927213203.GA28089@moo.pl>
On Mon, Sep 27, 2010 at 11:32:03PM +0200, Leszek Urbanski wrote:
> <20100926154324.GD21843@redhat.com>; from Michael S. Tsirkin on Sun, Sep 26, 2010 at 17:43:24 +0200
>
> > > > >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?
>
> (for reference: first post is at:
> http://lists.nongnu.org/archive/html/qemu-devel/2010-09/msg01685.html )
>
> I can't reproduce it on 2.6.36-rc5. Do you have an idea which patch may have
> fixed it, or should I dissect?
bisect, yes: there were many UFO related patches since 2.6.32.
--
MST
WARNING: multiple messages have this Message-ID (diff)
From: "Michael S. Tsirkin" <mst@redhat.com>
To: Leszek Urbanski <tygrys@moo.pl>
Cc: netdev@vger.kernel.org, linux-nfs@vger.kernel.org,
qemu-devel@nongnu.org, virtualization@lists.linux-foundation.org
Subject: Re: BUG - qdev - partial loss of network connectivity
Date: Tue, 28 Sep 2010 11:50:58 +0200 [thread overview]
Message-ID: <20100928095058.GI12472@redhat.com> (raw)
In-Reply-To: <20100927213203.GA28089@moo.pl>
On Mon, Sep 27, 2010 at 11:32:03PM +0200, Leszek Urbanski wrote:
> <20100926154324.GD21843@redhat.com>; from Michael S. Tsirkin on Sun, Sep 26, 2010 at 17:43:24 +0200
>
> > > > >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?
>
> (for reference: first post is at:
> http://lists.nongnu.org/archive/html/qemu-devel/2010-09/msg01685.html )
>
> I can't reproduce it on 2.6.36-rc5. Do you have an idea which patch may have
> fixed it, or should I dissect?
bisect, yes: there were many UFO related patches since 2.6.32.
--
MST
WARNING: multiple messages have this Message-ID (diff)
From: "Michael S. Tsirkin" <mst@redhat.com>
To: Leszek Urbanski <tygrys@moo.pl>
Cc: netdev@vger.kernel.org, linux-nfs@vger.kernel.org,
qemu-devel@nongnu.org, virtualization@lists.linux-foundation.org
Subject: [Qemu-devel] Re: BUG - qdev - partial loss of network connectivity
Date: Tue, 28 Sep 2010 11:50:58 +0200 [thread overview]
Message-ID: <20100928095058.GI12472@redhat.com> (raw)
In-Reply-To: <20100927213203.GA28089@moo.pl>
On Mon, Sep 27, 2010 at 11:32:03PM +0200, Leszek Urbanski wrote:
> <20100926154324.GD21843@redhat.com>; from Michael S. Tsirkin on Sun, Sep 26, 2010 at 17:43:24 +0200
>
> > > > >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?
>
> (for reference: first post is at:
> http://lists.nongnu.org/archive/html/qemu-devel/2010-09/msg01685.html )
>
> I can't reproduce it on 2.6.36-rc5. Do you have an idea which patch may have
> fixed it, or should I dissect?
bisect, yes: there were many UFO related patches since 2.6.32.
--
MST
next prev parent reply other threads:[~2010-09-28 9:57 UTC|newest]
Thread overview: 19+ 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 ` [Qemu-devel] " Michael S. Tsirkin
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 [this message]
2010-09-28 9:50 ` [Qemu-devel] " Michael S. Tsirkin
2010-09-28 9:50 ` Michael S. Tsirkin
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
-- strict thread matches above, loose matches on Subject: below --
2010-09-22 11:42 Leszek Urbanski
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