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Re: [Xen-devel] Re: new netfront and occasional receive path lockup

To: Pasi Kärkkäinen <pasik@xxxxxx>
Subject: Re: [Xen-devel] Re: new netfront and occasional receive path lockup
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Mon, 13 Sep 2010 12:36:19 -0700
Cc: "Xu, Dongxiao" <dongxiao.xu@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Gerald Turner <gturner@xxxxxxxxxx>
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 On 09/13/2010 09:08 AM, Pasi Kärkkäinen wrote:
> On Mon, Sep 13, 2010 at 09:01:57AM -0700, Gerald Turner wrote:
>> Gerald Turner <gturner@xxxxxxxxxx> writes:
>>> "Xu, Dongxiao" <dongxiao.xu@xxxxxxxxx> 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..



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