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From: "David Schwartz" <davids@webmaster.com>
To: "Linux-Kernel@Vger. Kernel. Org" <linux-kernel@vger.kernel.org>
Cc: <netdev@vger.kernel.org>
Subject: RE: [RFC/PATCH] SO_NO_CHECK for IPv6
Date: Thu, 22 Nov 2007 22:06:35 -0800	[thread overview]
Message-ID: <MDEHLPKNGKAHNMBLJOLKIEFLIGAC.davids@webmaster.com> (raw)
In-Reply-To: <20071122.171306.166854987.davem@davemloft.net>


> Regardless of whatever verifications your application is doing
> on the data, it is not checksumming the ports and that's what
> the pseudo-header is helping with.

So what? We are in the case where the data has already gotten to him. If it
got to him in error, he'll reject it anyway. The receive checksum check will
only reject packets that he would reject anyway. That makes it needless.

Of course, if the check is nearly free, there's no potential win, so no
point in bothering.

DS



  reply	other threads:[~2007-11-23  6:07 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-11-21 12:45 Jeff Garzik
2007-11-21 13:20 ` YOSHIFUJI Hideaki / 吉藤英明
2007-11-21 13:42   ` Herbert Xu
2007-11-22  0:17   ` Jeff Garzik
2007-11-22  2:34     ` Herbert Xu
2007-11-22  2:46       ` YOSHIFUJI Hideaki / 吉藤英明
2007-11-23  1:13     ` David Miller
2007-11-23  6:06       ` David Schwartz [this message]
2007-11-24  6:00         ` Herbert Xu
2007-11-25 15:41           ` David Schwartz
2007-11-26  2:47             ` Herbert Xu
2007-11-21 18:35 ` David Miller

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