From: "Jacky\(GuangXiang Lee\)" <gxli@arca.com.cn>
To: climeter@sgi.com
Cc: linux-mm@kvack.org
Subject: about page migration on UMA
Date: Wed, 17 Oct 2007 15:09:19 +0800 [thread overview]
Message-ID: <02f001c8108c$a3818760$3708a8c0@arcapub.arca.com> (raw)
In-Reply-To: <20071017145009.e4a56c0d.kamezawa.hiroyu@jp.fujitsu.com>
seems page migration is used mostly for NUMA platform to improve
performance.
But in a UMA architecture, Is it possible to use page migration to move
pages ?
----- Original Message -----
From: "KAMEZAWA Hiroyuki" <kamezawa.hiroyu@jp.fujitsu.com>
To: "David Rientjes" <rientjes@google.com>
Cc: <linux-mm@kvack.org>; <containers@lists.osdl.org>;
<balbir@linux.vnet.ibm.com>; <yamamoto@valinux.co.jp>
Sent: Wednesday, October 17, 2007 1:50 PM
Subject: Re: [PATCH] memory cgroup enhancements [1/5] force_empty for memory
cgroup
> On Tue, 16 Oct 2007 22:38:18 -0700 (PDT)
> David Rientjes <rientjes@google.com> wrote:
> > > Thanks,
> >
> > You mean make it write-only? Typically it would be as easy as only
> > specifying a mode of S_IWUSR so that it can only be written to, the
> > S_IFREG is already provided by cgroup_add_file().
> >
> > Unfortunately, cgroups do not appear to allow that. It hardcodes
> > the permissions of 0644 | S_IFREG into the cgroup_create_file() call
from
> > cgroup_add_file(), which is a bug. Cgroup files should be able to be
> > marked as read-only or write-only depending on their semantics.
> >
> > So until that bug gets fixed and you're allowed to pass your own file
> > modes to cgroup_add_files(), you'll have to provide the read function.
> >
> Hmm. it seems I have to read current cgroup code more.
> Thank you for advice.
>
> Regards,
> -Kame
>
> --
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next prev parent reply other threads:[~2007-10-17 7:09 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-16 10:19 [PATCH] memory cgroup enhancements [0/5] intro KAMEZAWA Hiroyuki
2007-10-16 10:23 ` [PATCH] memory cgroup enhancements [1/5] force_empty for memory cgroup KAMEZAWA Hiroyuki
2007-10-17 4:17 ` David Rientjes
2007-10-17 5:05 ` Balbir Singh
2007-10-17 5:26 ` KAMEZAWA Hiroyuki
2007-10-17 5:16 ` KAMEZAWA Hiroyuki
2007-10-17 5:38 ` David Rientjes
2007-10-17 5:50 ` KAMEZAWA Hiroyuki
2007-10-17 7:09 ` Jacky(GuangXiang Lee) [this message]
2007-10-17 6:44 ` about page migration on UMA KAMEZAWA Hiroyuki
2007-10-19 1:26 ` Christoph Lameter
2007-11-09 19:31 ` Jared Hulbert
2007-11-09 19:36 ` Christoph Lameter
2007-11-09 19:54 ` Jared Hulbert
2007-11-09 19:58 ` Christoph Lameter
2007-11-09 21:30 ` Dave Hansen
2007-11-12 0:50 ` KAMEZAWA Hiroyuki
2007-11-14 4:31 ` Jacky(GuangXiang Lee)
2007-11-14 17:05 ` Jared Hulbert
2007-10-16 10:25 ` [PATCH] memory cgroup enhancements [2/5] remember charge as cache KAMEZAWA Hiroyuki
2007-10-16 10:26 ` [PATCH] memory cgroup enhancements [3/5] record pc is on active list KAMEZAWA Hiroyuki
2007-10-17 4:17 ` David Rientjes
2007-10-17 5:16 ` KAMEZAWA Hiroyuki
2007-10-16 10:27 ` [PATCH] memory cgroup enhancements [4/5] memory cgroup statistics KAMEZAWA Hiroyuki
2007-10-16 10:28 ` [PATCH] memory cgroup enhancements [5/5] show statistics by memory.stat file per cgroup KAMEZAWA Hiroyuki
2007-10-16 18:20 ` [PATCH] memory cgroup enhancements [0/5] intro Balbir Singh
2007-10-16 18:28 ` Andrew Morton
2007-10-16 18:40 ` Balbir Singh
2007-10-17 5:19 ` KAMEZAWA Hiroyuki
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