From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx179.postini.com [74.125.245.179]) by kanga.kvack.org (Postfix) with SMTP id CBBBF6B00D6 for ; Wed, 3 Apr 2013 05:18:50 -0400 (EDT) Message-ID: <515BF41D.9080300@parallels.com> Date: Wed, 3 Apr 2013 13:19:25 +0400 From: Glauber Costa MIME-Version: 1.0 Subject: Re: [RFC][PATCH 0/7] memcg: make memcg's life cycle the same as cgroup References: <515BF233.6070308@huawei.com> In-Reply-To: <515BF233.6070308@huawei.com> Content-Type: text/plain; charset="GB2312" Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Li Zefan Cc: linux-mm@kvack.org, LKML , Cgroups , Tejun Heo , Michal Hocko , KAMEZAWA Hiroyuki , Johannes Weiner On 04/03/2013 01:11 PM, Li Zefan wrote: > The historical reason that memcg didn't use css_get in some cases, is that > cgroup couldn't be removed if there're still css refs. The situation has > changed so that rmdir a cgroup will succeed regardless css refs, but won't > be freed until css refs goes down to 0. > > This is an early post, and it's NOT TESTED. I just want to see if the changes > are fine in general. Well, from my PoV, this will in general greatly simplify memcg lifecycle management. Indeed, I can remember no other reason for those complications other than the problem with removing directories. If cgroup no longer have this limitation, I would much rather see your approach in. I will look into the patches individually soon -- 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: email@kvack.org