Re: netfilter queue throughput slowdown

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On Thu, Jun 30, 2011 at 8:15 AM, Eric Dumazet <eric.dumazet@xxxxxxxxx> wrote:
> Le jeudi 30 juin 2011 à 13:59 +0200, Patrick McHardy a écrit :
>
>> Thanks Eric, I agree. Give us data and we'll fix it if really is a bug.
>>
>> The fact that the timeout patch apparently helps indicates that some
>> packets don't receive verdicts.
>
> My rough guess is that this user application gets an error in its
> nfq_set_verdict() call ( maybe a transient out of memory indication) and
> packet never gets its verdict.

Hows does ENOBUFS interact with the queue? Is it possible that the
kernel->userspace notification of the packet id gets dropped, and
userspace is thus never notified of the packet id, and can't issue a
verdict?

Sam
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