Message-ID: <4FE82555.2010704@parallels.com>
Date: Mon, 25 Jun 2012 12:46:13 +0400
From: Glauber Costa <glommer@parallels.com>
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120605 Thunderbird/13.0
MIME-Version: 1.0
To: Minchan Kim <minchan@kernel.org>
CC: "linux-mm@kvack.org" <linux-mm@kvack.org>,
        LKML <linux-kernel@vger.kernel.org>, Rik van Riel <riel@redhat.com>,
        Mel Gorman <mgorman@suse.de>,
        KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
        KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Anton Vorontsov <anton.vorontsov@linaro.org>,
        John Stultz <john.stultz@linaro.org>,
        Pekka Enberg <penberg@kernel.org>,
        Wu Fengguang <fengguang.wu@intel.com>, Hugh Dickins <hughd@google.com>
Subject: Re: RFC:  Easy-Reclaimable LRU list
References: <4FE012CD.6010605@kernel.org>
In-Reply-To: <4FE012CD.6010605@kernel.org>
Content-Type: text/plain; charset="ISO-8859-1"; format=flowed
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 970
Lines: 28

On 06/19/2012 09:49 AM, Minchan Kim wrote:
> Hi everybody!
>
> Recently, there are some efforts to handle system memory pressure.
>
> 1) low memory notification - [1]
> 2) fallocate(VOLATILE) - [2]
> 3) fadvise(NOREUSE) - [3]
>
> For them, I would like to add new LRU list, aka "Ereclaimable" which is opposite of "unevictable".
> Reclaimable LRU list includes_easy_  reclaimable pages.
> For example, easy reclaimable pages are following as.
>
> 1. invalidated but remained LRU list.
> 2. pageout pages for reclaim(PG_reclaim pages)
> 3. fadvise(NOREUSE)
> 4. fallocate(VOLATILE)
>
> Their pages shouldn't stir normal LRU list and compaction might not migrate them, even.
What about other things moving memory like CMA ?


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/