linux-kernel - Re: [RFC][PATCH 0/2] memcg: simple hierarchy (v2)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20080529214626.00da9bda@bree.surriel.com>
Date:	Thu, 29 May 2008 21:46:26 -0400
From:	Rik van Riel <riel@...hat.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"balbir@...ux.vnet.ibm.com" <balbir@...ux.vnet.ibm.com>,
	"xemul@...nvz.org" <xemul@...nvz.org>,
	"menage@...gle.com" <menage@...gle.com>,
	"yamamoto@...inux.co.jp" <yamamoto@...inux.co.jp>,
	"lizf@...fujitsu.com" <lizf@...fujitsu.com>
Subject: Re: [RFC][PATCH 0/2] memcg: simple hierarchy (v2)

On Fri, 30 May 2008 10:43:12 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:

> Implemented Policy:
>   - parent overcommits all children
>      parent->usage = resource used by itself + resource moved to children.
>      Of course, parent->limit > parent->usage. 
>   - when child's limit is set, the resouce moves.
>   - no automatic resource moving between parent <-> child

> Why this is enough ?
>   - A middleware can do various kind of resource balancing only by reseting "limit"
>     in userland.

I like this idea.  The alternative could mean having a page live
on multiple cgroup LRU lists, not just the zone LRU and the one
cgroup LRU, and drastically increasing run time overhead.

Swapping memory in and out is horrendously slow anyway, so the
idea of having a daemon adjust the limits on the fly should work
just fine.

-- 
All rights reversed.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/