linux-kernel - Re: [PATCH] tcp: splice as many packets as possible at once

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Message-Id: <20090113.152759.29875009.davem@davemloft.net>
Date:	Tue, 13 Jan 2009 15:27:59 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	dada1@...mosbay.com
Cc:	w@....eu, ben@...s.com, jarkao2@...il.com, mingo@...e.hu,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	jens.axboe@...cle.com
Subject: Re: [PATCH] tcp: splice as many packets as possible at once

From: Eric Dumazet <dada1@...mosbay.com>
Date: Fri, 09 Jan 2009 08:28:09 +0100

> If the application uses setsockopt(sock, SOL_SOCKET, SO_RCVLOWAT,
> [32768], 4), it would be good if kernel was smart enough and could
> reduce number of wakeups.

Right, and as I pointed out in previous replies the problem is
that splice() receive in TCP doesn't check the low water mark
at all.
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