linux-kernel - Re: [RFC][PATCH] Remove cgroup member from struct page

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Date:	Tue, 9 Sep 2008 16:37:21 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	balbir@...ux.vnet.ibm.com
Cc:	Nick Piggin <nickpiggin@...oo.com.au>,
	Andrew Morton <akpm@...ux-foundation.org>, hugh@...itas.com,
	menage@...gle.com, xemul@...nvz.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [RFC][PATCH] Remove cgroup member from struct page

On Mon, 08 Sep 2008 21:18:37 -0700
Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:

> KAMEZAWA Hiroyuki wrote:
> > On Mon, 8 Sep 2008 20:58:10 +0530
> > Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:
> >> Sorry for the delay in sending out the new patch, I am traveling and
> >> thus a little less responsive. Here is the update patch
> >>
> >>
> > Hmm.. I've considered this approach for a while and my answer is that
> > this is not what you really want.
> > 
> > Because you just moves the placement of pointer from memmap to
> > radix_tree both in GFP_KERNEL, total kernel memory usage is not changed.
> 
> Agreed, but we do reduce the sizeof(struct page) without adding on to
> page_cgroup's size. So why don't we want this?
> 
Because it's depends on CONFIG.

But ok, I'll recall my patches from grave. Maybe it can be a hint for you.

Thanks,
-Kame

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