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From: David Miller <davem@davemloft.net>
Subject: Re: [patch 1/4] - Potential performance bottleneck for Linxu TCP
Date: Thu, 30 Nov 2006 12:14:43 -0800 (PST)
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From: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Date: Thu, 30 Nov 2006 13:22:06 +0300

> It steals timeslices from other processes to complete tcp_recvmsg()
> task, and only when it does it for too long, it will be preempted.
> Processing backlog queue on behalf of need_resched() will break
> fairness too - processing itself can take a lot of time, so process
> can be scheduled away in that part too.

Yes, at this point I agree with this analysis.

Currently I am therefore advocating some way to allow
full input packet handling even amidst tcp_recvmsg()
processing.