From: Li Zefan <lizf@cn.fujitsu.com>
To: Paul Menage <menage@google.com>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>,
linux-mm@kvack.org, Hugh Dickins <hugh@veritas.com>,
Sudhir Kumar <skumar@linux.vnet.ibm.com>,
YAMAMOTO Takashi <yamamoto@valinux.co.jp>,
linux-kernel@vger.kernel.org, taka@valinux.co.jp,
David Rientjes <rientjes@google.com>,
Pavel Emelianov <xemul@openvz.org>,
Andrew Morton <akpm@linux-foundation.org>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [RFC][0/3] Virtual address space control for cgroups
Date: Mon, 17 Mar 2008 10:47:19 +0900 [thread overview]
Message-ID: <47DDCDA7.4020108@cn.fujitsu.com> (raw)
In-Reply-To: <6599ad830803161626q1fcf261bta52933bb5e7a6bdd@mail.gmail.com>
Paul Menage wrote:
> On Mon, Mar 17, 2008 at 1:29 AM, Balbir Singh <balbir@linux.vnet.ibm.com> wrote:
>> This is an early patchset for virtual address space control for cgroups.
>> The patches are against 2.6.25-rc5-mm1 and have been tested on top of
>> User Mode Linux.
>
> What's the performance hit of doing these accounting checks on every
> mmap/munmap? If it's not totally lost in the noise, couldn't it be
> made a separate control group, so that it could be just enabled (and
> the performance hit taken) for users that actually want it?
>
It will be code duplication to make it a new subsystem, and it will be useful
to control both of them, am I right? :)
So could we just add a CONFIG to this patch series, like:
CONFIG_CGROUP_MEM_RES_AS_CTLR
?
> Paul
>
>
WARNING: multiple messages have this Message-ID (diff)
From: Li Zefan <lizf@cn.fujitsu.com>
To: Paul Menage <menage@google.com>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>,
linux-mm@kvack.org, Hugh Dickins <hugh@veritas.com>,
Sudhir Kumar <skumar@linux.vnet.ibm.com>,
YAMAMOTO Takashi <yamamoto@valinux.co.jp>,
linux-kernel@vger.kernel.org, taka@valinux.co.jp,
David Rientjes <rientjes@google.com>,
Pavel Emelianov <xemul@openvz.org>,
Andrew Morton <akpm@linux-foundation.org>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [RFC][0/3] Virtual address space control for cgroups
Date: Mon, 17 Mar 2008 10:47:19 +0900 [thread overview]
Message-ID: <47DDCDA7.4020108@cn.fujitsu.com> (raw)
In-Reply-To: <6599ad830803161626q1fcf261bta52933bb5e7a6bdd@mail.gmail.com>
Paul Menage wrote:
> On Mon, Mar 17, 2008 at 1:29 AM, Balbir Singh <balbir@linux.vnet.ibm.com> wrote:
>> This is an early patchset for virtual address space control for cgroups.
>> The patches are against 2.6.25-rc5-mm1 and have been tested on top of
>> User Mode Linux.
>
> What's the performance hit of doing these accounting checks on every
> mmap/munmap? If it's not totally lost in the noise, couldn't it be
> made a separate control group, so that it could be just enabled (and
> the performance hit taken) for users that actually want it?
>
It will be code duplication to make it a new subsystem, and it will be useful
to control both of them, am I right? :)
So could we just add a CONFIG to this patch series, like:
CONFIG_CGROUP_MEM_RES_AS_CTLR
?
> Paul
>
>
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next prev parent reply other threads:[~2008-03-17 1:47 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-16 17:29 [RFC][0/3] Virtual address space control for cgroups Balbir Singh
2008-03-16 17:29 ` Balbir Singh
2008-03-16 17:29 ` [RFC][1/3] Add user interface for virtual address space control Balbir Singh
2008-03-16 17:29 ` Balbir Singh
2008-03-16 17:30 ` [RFC][2/3] Account and control virtual address space allocations Balbir Singh
2008-03-16 17:30 ` Balbir Singh
2008-03-17 2:02 ` Paul Menage
2008-03-17 2:02 ` Paul Menage
2008-03-17 2:57 ` Balbir Singh
2008-03-17 2:57 ` Balbir Singh
2008-03-17 3:03 ` Paul Menage
2008-03-17 3:03 ` Paul Menage
2008-03-17 11:36 ` Pavel Emelyanov
2008-03-17 11:36 ` Pavel Emelyanov
2008-03-17 12:29 ` Balbir Singh
2008-03-17 12:29 ` Balbir Singh
2008-03-17 12:40 ` Pavel Emelyanov
2008-03-17 12:40 ` Pavel Emelyanov
2008-03-17 12:51 ` Balbir Singh
2008-03-17 12:51 ` Balbir Singh
2008-03-17 13:01 ` Pavel Emelyanov
2008-03-17 13:01 ` Pavel Emelyanov
2008-03-17 14:39 ` Balbir Singh
2008-03-17 14:39 ` Balbir Singh
2008-03-17 16:53 ` Dave Hansen
2008-03-17 16:53 ` Dave Hansen
2008-03-18 1:14 ` Balbir Singh
2008-03-18 1:14 ` Balbir Singh
2008-03-18 17:11 ` Dave Hansen
2008-03-18 17:11 ` Dave Hansen
2008-03-18 17:58 ` Balbir Singh
2008-03-18 17:58 ` Balbir Singh
2008-03-17 23:35 ` YAMAMOTO Takashi
2008-03-17 23:35 ` YAMAMOTO Takashi
2008-03-18 1:10 ` Balbir Singh
2008-03-18 1:10 ` Balbir Singh
2008-03-16 17:30 ` [RFC][3/3] Update documentation for virtual address space control Balbir Singh
2008-03-16 17:30 ` Balbir Singh
2008-03-16 18:32 ` Randy Dunlap
2008-03-16 18:32 ` Randy Dunlap
2008-03-17 1:33 ` Balbir Singh
2008-03-17 1:33 ` Balbir Singh
2008-03-16 23:26 ` [RFC][0/3] Virtual address space control for cgroups Paul Menage
2008-03-16 23:26 ` Paul Menage
2008-03-17 1:47 ` Li Zefan [this message]
2008-03-17 1:47 ` Li Zefan
2008-03-17 1:57 ` Paul Menage
2008-03-17 1:57 ` Paul Menage
2008-03-17 5:08 ` Balbir Singh
2008-03-17 5:08 ` Balbir Singh
2008-03-17 5:22 ` Paul Menage
2008-03-17 5:22 ` Paul Menage
2008-03-17 15:15 ` Balbir Singh
2008-03-17 15:15 ` Balbir Singh
2008-03-17 1:50 ` Balbir Singh
2008-03-17 1:50 ` Balbir Singh
2008-03-17 1:55 ` Paul Menage
2008-03-17 1:55 ` Paul Menage
2008-03-17 3:12 ` Balbir Singh
2008-03-17 3:12 ` Balbir Singh
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