From: Greg Thelen <gthelen@google.com>
To: Glauber Costa <glommer@parallels.com>
Cc: linux-kernel@vger.kernel.org, paul@paulmenage.org,
lizf@cn.fujitsu.com, kamezawa.hiroyu@jp.fujitsu.com,
ebiederm@xmission.com, davem@davemloft.net,
netdev@vger.kernel.org, linux-mm@kvack.org, kirill@shutemov.name
Subject: Re: [PATCH v3 2/7] socket: initial cgroup code.
Date: Wed, 21 Sep 2011 23:00:18 -0700 [thread overview]
Message-ID: <CAHH2K0Z_2LJPL0sLVHqkh_6b_BLQnknULTB9a9WfEuibk5kONg@mail.gmail.com> (raw)
In-Reply-To: <4E7A342B.5040608@parallels.com>
On Wed, Sep 21, 2011 at 11:59 AM, Glauber Costa <glommer@parallels.com> wrote:
> Right now I am working under the assumption that tasks are long lived inside
> the cgroup. Migration potentially introduces some nasty locking problems in
> the mem_schedule path.
>
> Also, unless I am missing something, the memcg already has the policy of
> not carrying charges around, probably because of this very same complexity.
>
> True that at least it won't EBUSY you... But I think this is at least a way
> to guarantee that the cgroup under our nose won't disappear in the middle of
> our allocations.
Here's the memcg user page behavior using the same pattern:
1. user page P is allocate by task T in memcg M1
2. T is moved to memcg M2. The P charge is left behind still charged
to M1 if memory.move_charge_at_immigrate=0; or the charge is moved to
M2 if memory.move_charge_at_immigrate=1.
3. rmdir M1 will try to reclaim P (if P was left in M1). If unable to
reclaim, then P is recharged to parent(M1).
--
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/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2011-09-22 6:00 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-19 0:56 [PATCH v3 0/7] per-cgroup tcp buffer pressure settings Glauber Costa
2011-09-19 0:56 ` [PATCH v3 1/7] Basic kernel memory functionality for the Memory Controller Glauber Costa
2011-09-21 2:23 ` Glauber Costa
2011-09-22 3:17 ` Balbir Singh
2011-09-22 3:19 ` Glauber Costa
2011-09-24 14:43 ` Glauber Costa
2011-09-27 10:06 ` Balbir Singh
2011-09-22 5:58 ` Greg Thelen
2011-09-26 10:34 ` KAMEZAWA Hiroyuki
2011-09-26 22:44 ` Glauber Costa
2011-09-26 23:18 ` Glauber Costa
2011-09-28 0:58 ` KAMEZAWA Hiroyuki
2011-09-28 12:03 ` Glauber Costa
2011-09-19 0:56 ` [PATCH v3 2/7] socket: initial cgroup code Glauber Costa
2011-09-21 18:47 ` Greg Thelen
2011-09-21 18:59 ` Glauber Costa
2011-09-22 6:00 ` Greg Thelen [this message]
2011-09-22 15:09 ` Balbir Singh
2011-09-24 13:33 ` Glauber Costa
2011-09-24 13:40 ` Glauber Costa
2011-09-24 14:45 ` Glauber Costa
2011-09-26 10:52 ` KAMEZAWA Hiroyuki
2011-09-26 22:47 ` Glauber Costa
2011-09-28 0:56 ` KAMEZAWA Hiroyuki
2011-09-27 20:43 ` Glauber Costa
2011-09-19 0:56 ` [PATCH v3 3/7] foundations of per-cgroup memory pressure controlling Glauber Costa
2011-09-19 0:56 ` [PATCH v3 4/7] per-cgroup tcp buffers control Glauber Costa
2011-09-26 10:59 ` KAMEZAWA Hiroyuki
2011-09-26 22:48 ` Glauber Costa
2011-09-27 1:53 ` Glauber Costa
2011-09-28 1:09 ` KAMEZAWA Hiroyuki
2011-09-26 14:39 ` Andrew Vagin
2011-09-26 22:52 ` Glauber Costa
2011-09-19 0:56 ` [PATCH v3 5/7] per-netns ipv4 sysctl_tcp_mem Glauber Costa
2011-09-19 0:56 ` [PATCH v3 6/7] tcp buffer limitation: per-cgroup limit Glauber Costa
2011-09-22 6:01 ` Greg Thelen
2011-09-22 9:58 ` Kirill A. Shutemov
2011-09-22 15:44 ` Greg Thelen
2011-09-24 13:30 ` Glauber Costa
2011-09-26 11:02 ` KAMEZAWA Hiroyuki
2011-09-26 22:49 ` Glauber Costa
2011-09-22 23:08 ` Balbir Singh
2011-09-24 13:35 ` Glauber Costa
2011-09-24 16:58 ` Andi Kleen
2011-09-24 17:27 ` Glauber Costa
2011-09-28 2:29 ` Balbir Singh
2011-09-28 3:06 ` Andi Kleen
2011-09-19 0:56 ` [PATCH v3 7/7] Display current tcp memory allocation in kmem cgroup Glauber Costa
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=CAHH2K0Z_2LJPL0sLVHqkh_6b_BLQnknULTB9a9WfEuibk5kONg@mail.gmail.com \
--to=gthelen@google.com \
--cc=davem@davemloft.net \
--cc=ebiederm@xmission.com \
--cc=glommer@parallels.com \
--cc=kamezawa.hiroyu@jp.fujitsu.com \
--cc=kirill@shutemov.name \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=lizf@cn.fujitsu.com \
--cc=netdev@vger.kernel.org \
--cc=paul@paulmenage.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox