netdev - Re: TCP_DEFER_ACCEPT is missing counter update

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Message-ID: <20091016052913.GB5574@1wt.eu>
Date:	Fri, 16 Oct 2009 07:29:13 +0200
From:	Willy Tarreau <w@....eu>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Julian Anastasov <ja@....bg>, David Miller <davem@...emloft.net>,
	netdev@...r.kernel.org
Subject: Re: TCP_DEFER_ACCEPT is missing counter update

On Fri, Oct 16, 2009 at 07:00:49AM +0200, Eric Dumazet wrote:
> Eric Dumazet a écrit :
> > 
> > 
> > So, it appears defer_accept value is not an inherited attribute,
> > but shared by all embryons. Therefore we should not touch it.
> > 
> > Of course it should be done, or add a new connection field to count number
> > of pure ACKS received on each SYN_RECV embryon.
> > 
> 
> Could be something like this ? (on top of net-next-2.6 of course)
> 
> 7 bits is more than enough, we could take 5 bits IMHO.

Couldn't we just rely on the retrans vs rskq_defer_accept comparison ?

Willy

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