netdev - Re: [PATCH 2.6.27.7-9-pae #7 SMP 1/1] networking tcp: Writing tcp socket be atomic

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Message-Id: <20100203.085249.98326242.davem@davemloft.net>
Date:	Wed, 03 Feb 2010 08:52:49 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	johny@...mco.com.cn
Cc:	kuznet@....inr.ac.ru, netdev@...r.kernel.org, jmorris@...ei.org,
	kaber@...eworks.de, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.6.27.7-9-pae #7 SMP 1/1] networking tcp: Writing tcp
 socket be atomic


Locking belongs inside of the application, not in the kernel.

As evidenced by the fact that you had to add new socket options, the
application needs to be modified anyways.

It's therefore just as easy to add the appropriate locking to the
sequences where the application writes over the TCP socket.  And
it avoids having to modify the kernel at all.
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