From: Daniel Lezcano <dlezcano@fr.ibm.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Andrey Savochkin <saw@swsoft.com>,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
serue@us.ibm.com, haveblue@us.ibm.com, clg@fr.ibm.com,
Andrew Morton <akpm@osdl.org>,
dev@sw.ru, herbert@13thfloor.at, devel@openvz.org,
sam@vilain.net, viro@ftp.linux.org.uk,
Alexey Kuznetsov <alexey@sw.ru>
Subject: Re: Network namespaces a path to mergable code.
Date: Thu, 29 Jun 2006 11:42:37 +0200 [thread overview]
Message-ID: <44A3A08D.6060502@fr.ibm.com> (raw)
In-Reply-To: <m11wt8erjv.fsf@ebiederm.dsl.xmission.com>
Eric W. Biederman wrote:
>>When an outgoing packet has the loopback destination addres, the
>>skbuff is filled with the network namespace. So the loopback packets
>>never go outside the namespace. This approach facilitate the migration
>>of loopback because identification is done by network namespace and
>>not by address. The loopback has been benchmarked by tbench and the
>>overhead is roughly 1.5 %
>
>
> Ugh. 1.5% is noticeable.
We will see with all private network namespace ...
>
> I think it is cheaper to have one loopback device per namespace.
> Which removes the need for a skbuff tag.
Yes, probably.
next prev parent reply other threads:[~2006-06-29 9:42 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-26 9:49 [patch 1/4] Network namespaces: cleanup of dev_base list use Andrey Savochkin
2006-06-26 9:52 ` [patch 2/4] " Andrey Savochkin
2006-06-26 9:54 ` [patch 3/4] Network namespaces: IPv4 FIB/routing in namespaces Andrey Savochkin
2006-06-26 9:55 ` [patch 4/4] Network namespaces: playing and debugging Andrey Savochkin
2006-06-26 15:04 ` Daniel Lezcano
2006-06-26 15:43 ` Andrey Savochkin
2006-06-26 17:29 ` Daniel Lezcano
2006-06-26 19:34 ` Andrey Savochkin
2006-06-26 14:56 ` [patch 3/4] Network namespaces: IPv4 FIB/routing in namespaces Daniel Lezcano
2006-06-26 15:46 ` Andrey Savochkin
2006-06-26 15:57 ` Daniel Lezcano
2006-06-26 19:39 ` Andrey Savochkin
2006-06-26 20:05 ` Herbert Poetzl
2006-06-27 9:25 ` Andrey Savochkin
2006-06-28 13:51 ` Daniel Lezcano
2006-06-28 14:19 ` Herbert Poetzl
2006-06-28 14:30 ` Andrey Savochkin
2006-06-28 14:34 ` Kirill Korotaev
2006-06-28 16:56 ` Daniel Lezcano
2006-06-28 17:10 ` Ben Greear
2006-06-28 15:05 ` Eric W. Biederman
2006-06-26 15:13 ` [RFC][patch 1/4] Network namespaces: cleanup of dev_base list use Eric W. Biederman
2006-06-26 15:42 ` [patch " Andrey Savochkin
2006-06-26 16:26 ` Eric W. Biederman
2006-06-26 20:14 ` Andrey Savochkin
2006-06-26 21:02 ` Eric W. Biederman
2006-06-27 6:59 ` [RFC][patch " Kirill Korotaev
2006-06-27 11:13 ` Eric W. Biederman
2006-06-27 15:08 ` Kirill Korotaev
2006-06-27 15:26 ` Serge E. Hallyn
2006-06-27 16:54 ` Eric W. Biederman
2006-06-27 17:20 ` [RFC] Network namespaces a path to mergable code Eric W. Biederman
2006-06-27 17:58 ` Andrey Savochkin
2006-06-27 22:20 ` Sam Vilain
2006-06-28 4:33 ` Eric W. Biederman
2006-06-28 5:59 ` Abdallah Chatila
2006-06-28 6:19 ` Sam Vilain
2006-06-28 6:55 ` Eric W. Biederman
2006-06-28 9:54 ` Cedric Le Goater
2006-06-28 14:03 ` Eric W. Biederman
2006-06-28 14:15 ` Serge E. Hallyn
2006-06-28 14:56 ` Eric W. Biederman
2006-06-28 4:20 ` Eric W. Biederman
2006-06-28 11:06 ` Andrey Savochkin
2006-06-28 16:51 ` Eric W. Biederman
2006-06-28 17:22 ` Andrey Savochkin
2006-06-28 17:40 ` Herbert Poetzl
2006-06-28 17:50 ` Eric W. Biederman
2006-06-28 18:11 ` Eric W. Biederman
2006-06-28 18:14 ` Eric W. Biederman
2006-06-28 18:51 ` Andrey Savochkin
2006-06-28 21:53 ` Daniel Lezcano
2006-06-28 22:54 ` James Morris
2006-06-29 0:19 ` Eric W. Biederman
2006-06-29 0:25 ` Eric W. Biederman
2006-06-29 9:42 ` Daniel Lezcano [this message]
2006-06-28 10:20 ` [RFC] " Cedric Le Goater
2006-06-28 15:20 ` Eric W. Biederman
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