On Tue, Jan 24, 2012 at 12:16:36PM +0900, KAMEZAWA Hiroyuki wrote:

quoted

Can we make this anon as well?

I'm sorry for long RTT. version 4 here.
==

quoted

From c40256561d6cdaee62be7ec34147e6079dc426f4 Mon Sep 17 00:00:00 2001

From: KAMEZAWA Hiroyuki <redacted>
Date: Thu, 19 Jan 2012 17:09:41 +0900
Subject: [PATCH] memcg: remove PCG_CACHE

We record 'the page is cache' by PCG_CACHE bit to page_cgroup.
Here, "CACHE" means anonymous user pages (and SwapCache). This
doesn't include shmem.

!CACHE means anonymous/swapcache

Consdering callers, at charge/uncharge, the caller should know
what  the page is and we don't need to record it by using 1bit
per page.

This patch removes PCG_CACHE bit and make callers of
mem_cgroup_charge_statistics() to specify what the page is.

Changelog since v3
 - renamed a variable 'rss' to 'anon'

Changelog since v2
 - removed 'not_rss', added 'anon'
 - changed a meaning of arguments to mem_cgroup_charge_statisitcs()
 - removed a patch to mem_cgroup_uncharge_cache
 - simplified comment.

Changelog since RFC.
 - rebased onto memcg-devel
 - rename 'file' to 'not_rss'
 - some cleanup and added comment.

Signed-off-by: KAMEZAWA Hiroyuki <redacted>

Acked-by: Johannes Weiner <hannes@cmpxchg.org>

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