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Date: Fri, 16 Dec 2011 14:28:14 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>,
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        Michal Hocko <mhocko@suse.cz>, Hugh Dickins <hughd@google.com>,
        Ying Han <yinghan@google.com>
Subject: Re: [PATCH 1/4] memcg: simplify page cache charging.
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On Wed, 14 Dec 2011 16:49:22 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:

> Because of commit ef6a3c6311, FUSE uses replace_page_cache() instead
> of add_to_page_cache(). Then, mem_cgroup_cache_charge() is not
> called against FUSE's pages from splice.

Speaking of ef6a3c6311 ("mm: add replace_page_cache_page() function"),
may I pathetically remind people that it's rather inefficient?

http://lkml.indiana.edu/hypermail/linux/kernel/1109.1/00375.html