From: Johannes Weiner <hannes@cmpxchg.org>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Michal Hocko <mhocko@suse.cz>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
Hugh Dickins <hughd@google.com>, Ying Han <yinghan@google.com>
Subject: Re: [PATCH 0/4] memcg: simplify LRU handling.
Date: Mon, 19 Dec 2011 16:56:13 +0100 [thread overview]
Message-ID: <20111219155613.GE1415@cmpxchg.org> (raw)
In-Reply-To: <20111214164734.4d7d6d97.kamezawa.hiroyu@jp.fujitsu.com>
On Wed, Dec 14, 2011 at 04:47:34PM +0900, KAMEZAWA Hiroyuki wrote:
>
> This series is onto linux-next +
> memcg-add-mem_cgroup_replace_page_cache-to-fix-lru-issue.patch
>
> The 1st purpose of this patch is reduce overheads of mem_cgroup_add/del_lru.
> They uses some atomic ops.
Which is noticable.
With a simple sparse file cat, mem_cgroup_lru_add_list() went from
1.12% cat [kernel.kallsyms] [k] mem_cgroup_lru_add_list
to
0.31% cat [kernel.kallsyms] [k] mem_cgroup_lru_add_list
and real time went down, too:
5 runs min median max in seconds
vanilla: 7.762 7.782 7.816
patched: 7.622 7.631 7.660
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prev parent reply other threads:[~2011-12-19 15:56 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-14 7:47 KAMEZAWA Hiroyuki
2011-12-14 7:49 ` [PATCH 1/4] memcg: simplify page cache charging KAMEZAWA Hiroyuki
2011-12-16 22:28 ` Andrew Morton
2011-12-19 0:01 ` KAMEZAWA Hiroyuki
2011-12-20 21:58 ` Andrew Morton
2011-12-21 0:01 ` KAMEZAWA Hiroyuki
2011-12-19 15:04 ` Johannes Weiner
2011-12-20 15:33 ` Michal Hocko
2011-12-14 7:50 ` [PATCH 2/4] memcg: simplify corner case handling of LRU KAMEZAWA Hiroyuki
2011-12-19 15:14 ` Johannes Weiner
2011-12-20 15:05 ` Michal Hocko
2011-12-14 7:51 ` [PATCH 3/4] memcg: clear pc->mem_cgorup if necessary KAMEZAWA Hiroyuki
2011-12-16 22:30 ` Andrew Morton
2011-12-19 15:37 ` Johannes Weiner
2011-12-20 0:35 ` Hiroyuki Kamezawa
2011-12-20 15:56 ` Michal Hocko
2011-12-14 7:52 ` [PATCH 4/4] memcg: simplify LRU handling by new rule KAMEZAWA Hiroyuki
2011-12-19 15:48 ` Johannes Weiner
2011-12-20 16:16 ` Michal Hocko
2011-12-21 0:09 ` KAMEZAWA Hiroyuki
2011-12-21 6:56 ` Michal Hocko
2011-12-19 15:56 ` Johannes Weiner [this message]
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