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

To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] Re: new netfront and occasional receive path lockup
From: Gerald Turner <gturner@xxxxxxxxxx>
Date: Sun, 12 Sep 2010 15:40:21 -0700
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Jeremy Fitzhardinge <jeremy@xxxxxxxx> writes:

>  On 09/12/2010 11:00 AM, Gerald Turner wrote:
>> I examined the Debian linux-image-2.6.32-5-xen-amd64 package and
>> confirmed the netfront driver is patched with an earlier version the
>> smartpoll code.
>> I manually merged Debian's kernel with Jeremy's updates to the
>> netfront driver in his git repository.
>>   $ git diff 
>> 5473680bdedb7a62e641970119e6e9381a8d80f4..3b966565a89659f938a4fd662c8475f0c00e0606
>> Deployed this new image on all domU's (except for two of them, as a
>> control group) and updated grub kernel parameter with
>> xen_netfront.use_smartpoll=0.
> That's good to hear.  But I also included a fix from Dongxiao which,
> if correct, means it should work with use_smartpoll=1 (or nothing, as
> that's the default).  Could you verify whether the fix in
> cb09635065163a933d0d00d077ddd9f0c0a908a1 does actually work or not?

I've been running with use_smartpoll=1 for a few hours this afternoon,
looks like Dongxiao's bugfix works.

Gerald Turner  Email: gturner@xxxxxxxxxx  JID: gturner@xxxxxxxxxxxxxxxxx
GPG: 0xFA8CD6D5  21D9 B2E8 7FE7 F19E 5F7D  4D0C 3FA0 810F FA8C D6D5

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