From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pasi =?iso-8859-1?Q?K=E4rkk=E4inen?= <pasik@iki.fi>
Subject: Re: Re: new netfront and occasional receive path lockup
Date: Mon, 13 Sep 2010 19:08:40 +0300
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To: Gerald Turner <gturner@unzane.com>
Cc: "Xu, Dongxiao" <dongxiao.xu@intel.com>, "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>, Jeremy Fitzhardinge <jeremy@goop.org>
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On Mon, Sep 13, 2010 at 09:01:57AM -0700, Gerald Turner wrote:
> Gerald Turner <gturner@unzane.com> writes:
> 
> > "Xu, Dongxiao" <dongxiao.xu@intel.com> writes:
> >
> >> Thanks for your detail information.
> >>
> >> Unfortunately I don't have such platform that could launch more than
> >> 10 guests in hand.
> >>
> >> Here is another patch (see attached file) that fix another potential
> >> race.
> >>
> >> Do you have bandwidth to have a try? Thanks in advance!
> >>
> >
> > I built a kernel with your additional patch.
> >
> > I have it running on all 13 domU's with use_smartpoll=1.
> >
> > I'll report tomorrow morning whether there were any lockups.
> >
> > FYI, total today I had 6 lockups with use_smartpoll=1 and the previous
> > patch.
> >
> 
> Sorry bad news again...
> 
> Had 5 lockups within 4 hours.
> 
> Then I restarted all domUs with use_smartpoll=0 and haven't had any
> lockups in 7 hours.
>

I think we should default xen/stable-2.6.32.x to use_smartpoll=0 for the time being
until this is sorted out..

-- Pasi