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From: Michal Hocko <mhocko@suse.cz>
To: Tejun Heo <tj@kernel.org>
Cc: linux-mm@kvack.org, cgroups@vger.kernel.org,
	linux-kernel@vger.kernel.org, Li Zefan <lizefan@huawei.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	Balbir Singh <bsingharora@gmail.com>
Subject: Re: [PATCH 4/6] cgroups: forbid pre_destroy callback to fail
Date: Thu, 25 Oct 2012 20:48:34 +0200	[thread overview]
Message-ID: <20121025184834.GB20618@dhcp22.suse.cz> (raw)
In-Reply-To: <20121025174220.GJ11442@htj.dyndns.org>

On Thu 25-10-12 10:42:20, Tejun Heo wrote:
> Hey, Michal.
> 
> On Thu, Oct 25, 2012 at 04:37:56PM +0200, Michal Hocko wrote:
> > I am not sure I understand you here. So are you suggesting
> > s/BUG_ON/WARN_ON_ONCE/ in this patch?
> 
> Oh, no, I meant that we can do upto patch 3 of this series and then
> follow up with proper cgroup core update and then stack further
> memcg cleanups on top.

I thought the later cleanups would be on top of the series.

> > > Let's create a cgroup branch and build things there.  I don't think
> > > cgroup changes are gonna be a single patch and expect to see at least
> > > some bug fixes afterwards and don't wanna keep them floating separate
> > > from other cgroup changes.  
> > 
> > > mm being based on top of -next, that should work, right?
> > 
> > Well, a tree based on -next is, ehm, impractical. I can create a bug on
> > top of my -mm git branch (where I merge your cgroup common changes) for
> > development and then when we are ready we can send it as a series and
> > push it via Andrew. Would that work for you?
> > Or we can push the core part via Andrew, wait for the merge and work on
> > the follow up cleanups later?
> > It is not like the follow up part is really urgent, isn't it? I would
> > just like the memcg part settled first because this can potentially
> > conflict with other memcg work.
> 
> Argh... can we pretty *please* just do a plain git branch?  I don't
> care where it is but I want to be able to pull it into cgroup core and

Hohumm, I have tried to apply the series on top of Linus' 3.6 and there
were no conflicts so I can create a branch which you can pull into your
cgroup branch (which I can then merge into -mm git tree).
This would however mean that those patches wouldn't fly through Andrew's
tree. Is this really what we want and what does it give to us?

> yes I do wanna make this happen in this devel cycle.  We've been
> sitting on it far too long waiting for memcg.

I can surely imagine that (for the memcg part) but it needs throughout
review.
-- 
Michal Hocko
SUSE Labs

  reply	other threads:[~2012-10-25 18:48 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-17 13:30 [RFC] memcg/cgroup: do not fail fail on pre_destroy callbacks Michal Hocko
2012-10-17 13:30 ` [PATCH 1/6] memcg: split mem_cgroup_force_empty into reclaiming and reparenting parts Michal Hocko
2012-10-18 21:56   ` Tejun Heo
2012-10-17 13:30 ` [PATCH 2/6] memcg: root_cgroup cannot reach mem_cgroup_move_parent Michal Hocko
2012-10-18 21:58   ` Tejun Heo
2012-10-17 13:30 ` [PATCH 3/6] memcg: Simplify mem_cgroup_force_empty_list error handling Michal Hocko
2012-10-18 22:16   ` Tejun Heo
2012-10-19 13:24     ` Michal Hocko
2012-10-19 19:49       ` Tejun Heo
2012-10-17 13:30 ` [PATCH 4/6] cgroups: forbid pre_destroy callback to fail Michal Hocko
2012-10-18 22:41   ` Tejun Heo
2012-10-18 22:46     ` Tejun Heo
2012-10-19 13:34       ` Michal Hocko
2012-10-19 13:32     ` Michal Hocko
2012-10-19 20:24       ` Tejun Heo
2012-10-22 10:30         ` Michal Hocko
2012-10-24 19:25           ` Tejun Heo
2012-10-25 14:37             ` Michal Hocko
2012-10-25 17:42               ` Tejun Heo
2012-10-25 18:48                 ` Michal Hocko [this message]
2012-10-19  9:33   ` Li Zefan
2012-10-19 11:09     ` Michal Hocko
2012-10-19 20:17     ` Tejun Heo
2012-10-17 13:30 ` [PATCH 5/6] memcg: make mem_cgroup_reparent_charges non failing Michal Hocko
2012-10-18  8:30   ` Li Zefan
2012-10-18  8:42     ` Michal Hocko
2012-10-18 22:48   ` Tejun Heo
2012-10-19 13:49   ` Michal Hocko
2012-10-17 13:30 ` [PATCH 6/6] hugetlb: do not fail in hugetlb_cgroup_pre_destroy Michal Hocko
2012-10-18 22:48   ` Tejun Heo
2012-10-17 15:30 ` [RFC] memcg/cgroup: do not fail fail on pre_destroy callbacks Glauber Costa
2012-10-18  0:29 ` Kamezawa Hiroyuki

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