Date: Tue, 15 Mar 2011 11:54:51 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Greg Thelen <gthelen@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org, containers@lists.osdl.org,
        linux-fsdevel@vger.kernel.org, Andrea Righi <arighi@develer.com>,
        Balbir Singh <balbir@linux.vnet.ibm.com>,
        Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>,
        Minchan Kim <minchan.kim@gmail.com>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Ciju Rajan K <ciju@linux.vnet.ibm.com>,
        David Rientjes <rientjes@google.com>,
        Wu Fengguang <fengguang.wu@intel.com>,
        Chad Talbott <ctalbott@google.com>,
        Justin TerAvest <teravest@google.com>, Vivek Goyal <vgoyal@redhat.com>
Subject: Re: [PATCH v6 0/9] memcg: per cgroup dirty page accounting
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On Mon, 14 Mar 2011 19:51:22 -0700
Greg Thelen <gthelen@google.com> wrote:

> On Mon, Mar 14, 2011 at 6:56 PM, KAMEZAWA Hiroyuki
> <kamezawa.hiroyu@jp.fujitsu.com> wrote:
> > On Mon, 14 Mar 2011 11:29:17 -0700
> > Greg Thelen <gthelen@google.com> wrote:
> >
> >> On Fri, Mar 11, 2011 at 5:10 PM, Andrew Morton
> The foreign dirtier issue is all about identifying the memcg (or
> possibly multiple bdi) that need balancing.    If the foreign dirtier
> issue is not important then we can focus on identifying inodes to
> writeback that will lower the current's memcg dirty usage.  I am fine
> ignoring the foreign dirtier issue for now and breaking the problem
> into smaller pieces.
> 
ok.

> I think this can be done with out any additional state.  Can just scan
> the memcg lru to find dirty file pages and thus inodes to pass to
> sync_inode(), or some other per-inode writeback routine?
> 

I think it works, finding inodes to be cleaned by LRU scanning.

Thanks,
-Kame

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