linux-kernel - Re: [-mm] Make the memory controller more desktop responsive (v2)

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Date:	Fri, 4 Apr 2008 23:01:45 +0900
From:	"KOSAKI Motohiro" <m-kosaki@...es.dti.ne.jp>
To:	"Balbir Singh" <balbir@...ux.vnet.ibm.com>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	"YAMAMOTO Takashi" <yamamoto@...inux.co.jp>,
	"Paul Menage" <menage@...gle.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, "Pavel Emelianov" <xemul@...nvz.org>,
	"KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [-mm] Make the memory controller more desktop responsive (v2)

Hi

>  @@ -612,7 +611,7 @@ retry:
>         pc->page = page;
>         pc->flags = PAGE_CGROUP_FLAG_ACTIVE;
>         if (ctype == MEM_CGROUP_CHARGE_TYPE_CACHE)
>  -               pc->flags |= PAGE_CGROUP_FLAG_CACHE;
>  +               pc->flags = PAGE_CGROUP_FLAG_CACHE;
>
>         lock_page_cgroup(page);
>         if (page_get_page_cgroup(page)) {

Yes.
in general, cache page create as cold page.
if not, large file copy or streaming file drop all cache easily.

Reviewd-by: KOSAKI
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