All of lore.kernel.org
 help / color / mirror / Atom feed
From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Paul Menage <menage@google.com>
Cc: linux-mm@kvack.org, Hugh Dickins <hugh@veritas.com>,
	Sudhir Kumar <skumar@linux.vnet.ibm.com>,
	YAMAMOTO Takashi <yamamoto@valinux.co.jp>,
	lizf@cn.fujitsu.com, 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 07:20:22 +0530	[thread overview]
Message-ID: <47DDCE5E.9020104@linux.vnet.ibm.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?
> 

I am yet to measure the performance overhead of the accounting checks. I'll try
and get started on that today. I did not consider making it a separate system,
because I suspect that anybody wanting memory control would also want address
space control (for the advantages listed in the documentation). I am not against
the idea of making it a separate subsystem, but first let me get back with the
numbers.

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL

WARNING: multiple messages have this Message-ID (diff)
From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Paul Menage <menage@google.com>
Cc: linux-mm@kvack.org, Hugh Dickins <hugh@veritas.com>,
	Sudhir Kumar <skumar@linux.vnet.ibm.com>,
	YAMAMOTO Takashi <yamamoto@valinux.co.jp>,
	lizf@cn.fujitsu.com, 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 07:20:22 +0530	[thread overview]
Message-ID: <47DDCE5E.9020104@linux.vnet.ibm.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?
> 

I am yet to measure the performance overhead of the accounting checks. I'll try
and get started on that today. I did not consider making it a separate system,
because I suspect that anybody wanting memory control would also want address
space control (for the advantages listed in the documentation). I am not against
the idea of making it a separate subsystem, but first let me get back with the
numbers.

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>

  parent reply	other threads:[~2008-03-17  1:52 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
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 [this message]
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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=47DDCE5E.9020104@linux.vnet.ibm.com \
    --to=balbir@linux.vnet.ibm.com \
    --cc=akpm@linux-foundation.org \
    --cc=hugh@veritas.com \
    --cc=kamezawa.hiroyu@jp.fujitsu.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=lizf@cn.fujitsu.com \
    --cc=menage@google.com \
    --cc=rientjes@google.com \
    --cc=skumar@linux.vnet.ibm.com \
    --cc=taka@valinux.co.jp \
    --cc=xemul@openvz.org \
    --cc=yamamoto@valinux.co.jp \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.