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

To: "Xu, Dongxiao" <dongxiao.xu@xxxxxxxxx>
Subject: Re: [Xen-devel] Re: new netfront and occasional receive path lockup
From: Gerald Turner <gturner@xxxxxxxxxx>
Date: Mon, 13 Sep 2010 09:01:57 -0700
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
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In-reply-to: <8739tecl6i.fsf@xxxxxxxxxxxxxxxxxxxx> (Gerald Turner's message of "Sun, 12 Sep 2010 21:38:29 -0700")
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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.

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

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