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From: David Miller <davem@davemloft.net>
To: ebiederm@xmission.com
Cc: containers@lists.osdl.org, adobriyan@gmail.com,
	netdev@vger.kernel.org, equinox@diac24.net,
	linux-kernel@vger.kernel.org, serge@hallyn.com
Subject: Re: [PATCH 2/2] proc: Usable inode numbers for the namespace file descriptors.
Date: Sun, 19 Jun 2011 16:22:18 -0700 (PDT)	[thread overview]
Message-ID: <20110619.162218.1110628316477222542.davem@davemloft.net> (raw)
In-Reply-To: <m1mxhgav9c.fsf_-_@fess.ebiederm.org>

From: ebiederm@xmission.com (Eric W. Biederman)
Date: Fri, 17 Jun 2011 16:33:19 -0700

> 
> Assign a unique proc inode to each namespace, yielding an
> identifier that userspace can use for identifying a namespace.
> 
> This has been a long requested feature and only blocked because
> a naive implementation would put the id in a global space and
> would ultimately require having a namespace for the names of
> namespaces, making migration and certain virtualization tricks
> impossible.
> 
> We still don't have per superblock inode numbers for proc, which
> appears necessary for application unaware checkpoint/restart and
> migrations (if the application is using namespace filedescriptors)
> but that is now allowd by the design if it becomes important.
> 
> I have preallocated the ipc and uts initial proc inode numbers so
> their structures can be statically initialized.
> 
> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

For networking bits:

Acked-by: David S. Miller <davem@davemloft.net>

  reply	other threads:[~2011-06-19 23:22 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-21  9:39 [PATCH] netns: add /proc/*/net/id symlink Alexey Dobriyan
2011-05-21 15:39 ` Eric W. Biederman
2011-05-21 22:30   ` Alexey Dobriyan
2011-05-22  0:15     ` Eric W. Biederman
2011-05-23  1:43       ` David Lamparter
2011-05-23  1:47         ` David Lamparter
2011-06-17 23:31           ` [PATCH 1/2] proc: Generalize proc inode allocation Eric W. Biederman
2011-06-17 23:31             ` Eric W. Biederman
2011-06-17 23:33             ` [PATCH 2/2] proc: Usable inode numbers for the namespace file descriptors Eric W. Biederman
2011-06-17 23:33               ` Eric W. Biederman
2011-06-19 23:22               ` David Miller [this message]
2011-06-20 16:06               ` Serge E. Hallyn
2011-06-20 19:50                 ` Eric W. Biederman
2011-06-19 14:20             ` [PATCH 1/2] proc: Generalize proc inode allocation Serge E. Hallyn
2011-05-23  2:02         ` [PATCH] netns: add /proc/*/net/id symlink Eric W. Biederman

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