From: Srivatsa Vaddagiri <vatsa@in.ibm.com>
To: Paul Jackson <pj@sgi.com>
Cc: Herbert Poetzl <herbert@13thfloor.at>,
dev@openvz.org, ebiederm@xmission.com, winget@google.com,
containers@lists.osdl.org, menage@google.com,
ckrm-tech@lists.sourceforge.net, xemul@sw.ru,
akpm@linux-foundation.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/2] resource control file system - aka containers on top of nsproxy!
Date: Mon, 5 Mar 2007 23:17:50 +0530 [thread overview]
Message-ID: <20070305174750.GA14507@in.ibm.com> (raw)
In-Reply-To: <20070303132244.80b5cb40.pj@sgi.com>
On Sat, Mar 03, 2007 at 01:22:44PM -0800, Paul Jackson wrote:
> I still can't claim to have my head around this, but what you write
> here, Herbert, writes here touches on what I suspect is a key
> difference between namespaces and resources that would make it
> impractical to accomplish both with a shared mechanism for aggregating
> tasks.
The way nsproxy is structured, its all pointers to actual namespace (or
in case of rcfs patch) resource objects. This lets namespaces objects be in a
flat hierarchy while resource objects are in tree-like hierarchy.
nsproxy itself doesnt decide any hierarchy. Its those objects pointed to
by nsproxy which can form different hierarchies. In fact the rcfs
patches allows such a combination afaics.
> > on every limit accounting or check? I think that
> > is quite a lot of overhead ...
>
> Do either of these dereferences require locks?
A rcu_read_lock() should be required, which is not that expensive.
--
Regards,
vatsa
next prev parent reply other threads:[~2007-03-05 17:41 UTC|newest]
Thread overview: 125+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-01 13:35 [PATCH 0/2] resource control file system - aka containers on top of nsproxy! Srivatsa Vaddagiri
2007-03-01 13:45 ` [PATCH 1/2] rcfs core patch Srivatsa Vaddagiri
2007-03-01 16:31 ` Serge E. Hallyn
2007-03-01 16:46 ` Srivatsa Vaddagiri
2007-03-02 5:06 ` [ckrm-tech] " Balbir Singh
2007-03-03 9:38 ` Srivatsa Vaddagiri
2007-03-08 3:12 ` Eric W. Biederman
2007-03-08 9:10 ` Paul Menage
2007-03-09 0:38 ` Herbert Poetzl
2007-03-09 9:07 ` Kirill Korotaev
2007-03-09 13:29 ` Herbert Poetzl
2007-03-09 17:57 ` Srivatsa Vaddagiri
2007-03-10 1:19 ` Herbert Poetzl
2007-03-11 16:36 ` Serge E. Hallyn
2007-03-12 23:16 ` Herbert Poetzl
2007-03-08 10:13 ` Srivatsa Vaddagiri
2007-03-09 0:48 ` Herbert Poetzl
2007-03-09 2:35 ` Paul Jackson
2007-03-09 9:23 ` Kirill Korotaev
2007-03-09 9:38 ` Paul Jackson
2007-03-09 13:21 ` Herbert Poetzl
2007-03-11 17:09 ` Kirill Korotaev
2007-03-12 23:00 ` Herbert Poetzl
2007-03-13 8:28 ` Kirill Korotaev
2007-03-13 13:55 ` Herbert Poetzl
2007-03-13 14:11 ` [ckrm-tech] " Srivatsa Vaddagiri
2007-03-13 15:52 ` Herbert Poetzl
2007-03-09 18:14 ` Srivatsa Vaddagiri
2007-03-09 19:25 ` Paul Jackson
2007-03-10 1:00 ` Herbert Poetzl
2007-03-10 1:31 ` Paul Jackson
2007-03-10 0:56 ` Herbert Poetzl
2007-03-09 16:16 ` Serge E. Hallyn
2007-03-01 13:50 ` [PATCH 2/2] cpu_accounting controller Srivatsa Vaddagiri
2007-03-01 19:39 ` [PATCH 0/2] resource control file system - aka containers on top of nsproxy! Paul Jackson
2007-03-02 15:45 ` Kirill Korotaev
2007-03-02 16:52 ` Andrew Morton
2007-03-02 17:25 ` Kirill Korotaev
2007-03-03 17:45 ` Herbert Poetzl
2007-03-03 21:22 ` Paul Jackson
2007-03-05 17:47 ` Srivatsa Vaddagiri [this message]
2007-03-03 9:36 ` Srivatsa Vaddagiri
2007-03-03 10:21 ` Paul Jackson
2007-03-05 17:02 ` Srivatsa Vaddagiri
2007-03-03 17:32 ` Herbert Poetzl
2007-03-05 17:34 ` [ckrm-tech] " Srivatsa Vaddagiri
2007-03-05 18:39 ` Herbert Poetzl
2007-03-06 10:39 ` Srivatsa Vaddagiri
2007-03-06 13:28 ` Herbert Poetzl
2007-03-06 16:21 ` Srivatsa Vaddagiri
2007-03-07 2:32 ` Paul Menage
2007-03-07 17:30 ` Srivatsa Vaddagiri
2007-03-07 17:29 ` Paul Menage
2007-03-07 17:52 ` [ckrm-tech] " Srivatsa Vaddagiri
2007-03-07 17:32 ` Srivatsa Vaddagiri
2007-03-07 17:43 ` Serge E. Hallyn
2007-03-07 17:46 ` Paul Menage
2007-03-07 23:16 ` Eric W. Biederman
2007-03-08 11:39 ` Srivatsa Vaddagiri
2007-03-07 18:00 ` Srivatsa Vaddagiri
2007-03-07 20:58 ` Serge E. Hallyn
2007-03-07 21:20 ` Paul Menage
2007-03-07 21:59 ` Serge E. Hallyn
2007-03-07 22:13 ` Dave Hansen
2007-03-07 23:13 ` Eric W. Biederman
2007-03-12 14:11 ` [ckrm-tech] " Srivatsa Vaddagiri
2007-03-07 22:32 ` Eric W. Biederman
2007-03-07 23:18 ` Paul Menage
2007-03-08 0:35 ` Sam Vilain
2007-03-08 0:42 ` Paul Menage
2007-03-08 0:53 ` Sam Vilain
2007-03-08 0:58 ` [ckrm-tech] " Paul Menage
2007-03-08 1:32 ` Eric W. Biederman
2007-03-08 1:35 ` Paul Menage
2007-03-08 2:25 ` Eric W. Biederman
2007-03-09 0:56 ` Herbert Poetzl
2007-03-09 0:53 ` Herbert Poetzl
2007-03-09 18:19 ` Srivatsa Vaddagiri
2007-03-09 19:36 ` Paul Jackson
2007-03-09 21:52 ` Herbert Poetzl
2007-03-09 22:06 ` Paul Jackson
2007-03-12 14:01 ` Srivatsa Vaddagiri
2007-03-12 15:15 ` Srivatsa Vaddagiri
2007-03-12 20:26 ` Paul Jackson
2007-03-09 4:30 ` Paul Jackson
2007-03-08 2:47 ` Sam Vilain
2007-03-08 2:57 ` Paul Menage
2007-03-08 3:32 ` Sam Vilain
2007-03-08 6:10 ` Matt Helsley
2007-03-08 6:44 ` Eric W. Biederman
2007-03-09 1:06 ` Herbert Poetzl
2007-03-10 9:06 ` Sam Vilain
2007-03-11 21:15 ` Paul Jackson
2007-03-12 9:35 ` Sam Vilain
2007-03-12 10:00 ` Paul Menage
2007-03-12 23:21 ` Herbert Poetzl
2007-03-13 2:25 ` Paul Menage
2007-03-13 15:57 ` Herbert Poetzl
2007-03-09 4:37 ` Paul Jackson
2007-03-08 6:32 ` Eric W. Biederman
2007-03-08 9:10 ` Paul Menage
2007-03-09 16:50 ` Serge E. Hallyn
2007-03-22 14:08 ` Srivatsa Vaddagiri
2007-03-22 14:39 ` Serge E. Hallyn
2007-03-22 14:56 ` Srivatsa Vaddagiri
2007-03-09 4:27 ` Paul Jackson
2007-03-10 8:52 ` Sam Vilain
2007-03-10 9:11 ` Paul Jackson
2007-03-09 16:34 ` Srivatsa Vaddagiri
2007-03-09 16:41 ` [ckrm-tech] " Srivatsa Vaddagiri
2007-03-09 22:09 ` Paul Menage
2007-03-10 2:02 ` Srivatsa Vaddagiri
2007-03-10 3:19 ` [ckrm-tech] " Srivatsa Vaddagiri
2007-03-12 15:07 ` Srivatsa Vaddagiri
2007-03-12 15:56 ` Serge E. Hallyn
2007-03-12 16:20 ` Srivatsa Vaddagiri
2007-03-12 17:25 ` Serge E. Hallyn
2007-03-12 21:15 ` Sam Vilain
2007-03-12 23:31 ` Herbert Poetzl
2007-03-13 2:22 ` Srivatsa Vaddagiri
2007-03-08 0:50 ` Sam Vilain
2007-03-08 11:30 ` Srivatsa Vaddagiri
2007-03-09 1:16 ` Herbert Poetzl
2007-03-09 18:41 ` Srivatsa Vaddagiri
2007-03-10 2:03 ` Herbert Poetzl
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