linux-kernel - Re: [PATCH -mm][preview] memcg: a patch series for next [0/9]

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Message-Id: <20080820102626.b245b596.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Wed, 20 Aug 2008 10:26:26 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Daisuke Nishimura <nishimura@....nes.nec.co.jp>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"balbir@...ux.vnet.ibm.com" <balbir@...ux.vnet.ibm.com>,
	"yamamoto@...inux.co.jp" <yamamoto@...inux.co.jp>,
	ryov@...inux.co.jp
Subject: Re: [PATCH -mm][preview] memcg: a patch series for next [0/9]

On Tue, 19 Aug 2008 18:11:50 +0900
Daisuke Nishimura <nishimura@....nes.nec.co.jp> wrote:

> On Tue, 19 Aug 2008 17:30:14 +0900, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:
> > Hi, 
> > 
> > This post is for showing what I'm trying now.
> > 
> > This patch set is for memory resource controller.
> > 4 purposes here.
> >   - improve performance of memcg.
> >   - remove lock_page_cgroup()
> >   - making page_cgroup->flags to be atomic_ops.
> >   - support mem+swap controller.
> > 
> 
> Thank you for working on mem+swap controller.
> 
> I'll review and comment later.
> 
My next version (writing now) will be much cleaner and clearer than this ;)
So, please review only if you have free time.

Thanks,
-Kame

> 
> Thanks,
> Daisuke Nishimura.
> 
> > But this is still under test and the series is not well organised.
> > and base tree is old. (2.6.27-rc1-mm1) I'll rebase this set to newer mmtom tree.
> > 
> > Maybe this set have some troubles/objections but I think the direction is not bad.
> > 
> > Patch description. (patch ordering is bad. I'll fix in the next post.)
> > 
> > [1/9] ... private_counter ...replace res_counter with my own counter.
> >           This is for supporting mem+swap controller.
> >           (And I think memcg has a bit different characteristics from other
> >            users of res_counter....)
> > 
> > [2/9] ... change-order-uncharge ...
> >           This patch is for making it easy to handle swap-cache.
> > 
> > [3/9] ... atomic_flags
> >           This patch changes operations for page_cgroup->flags to be atomic_ops.
> > 
> > [4/9] ... delayed freeing.
> >           delaying to free page_cgroup at uncharge.
> > 
> > [5/9] ... RCU freeing of page_cgroup
> >           free page_cgroup by RCU.
> > 
> > [6/9] ... lockress page cgroup.
> >           remove lock_page_cgroup() and use RCU semantics.
> > 
> > [7/9] ... add preftech
> >           add prefetch() macro
> > 
> > [8/9] ... mem+swap controller base.
> >           introduce mem+swap controller. A bit big patch....but have tons of TODO.
> >           and have troubles. (it seems it's difficult to cause OOM killer.)
> > 
> > [9/9] ... mem+swap controller control files.
> >           add mem+swap controller's control files.
> > 
> > I'd like to push patch [2,3,4,5,6,7] first.
> > 
> > Thanks,
> > -Kame
> > 
> 

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