linux-kernel - Re: [PATCH 0/5] Some vmevent fixes...

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Date:	Mon, 04 Jun 2012 15:50:28 -0400
From:	KOSAKI Motohiro <kosaki.motohiro@...il.com>
To:	Minchan Kim <minchan@...nel.org>
CC:	Pekka Enberg <penberg@...nel.org>,
	Anton Vorontsov <cbouatmailru@...il.com>,
	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	Leonid Moiseichuk <leonid.moiseichuk@...ia.com>,
	John Stultz <john.stultz@...aro.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linaro-kernel@...ts.linaro.org,
	patches@...aro.org, kernel-team@...roid.com
Subject: Re: [PATCH 0/5] Some vmevent fixes...

> KOSAKI, AFAIRC, you are a person who hates android low memory killer.
> Why do you hate it? If it solve problems I mentioned, do you have a concern, still?
> If so, please, list up.

1) it took tasklist_lock. (it was solved already)
2) hacky lowmem_deathpending_timeout
3) No ZONE awareness. global_page_state(), lowmem_minfree[] and shrink_slab interface
    don't realize real memory footprint.
4) No memcg, cpuset awareness.
5) strange score calculation. the score is calculated from anon_rss+file_rss,
    but oom killer only free anon_rss.
6) strange oom_score_adj overload
7) much duplicate code w/ oom_killer. we can make common helper function, I think.
8) John's fallocate(VOLATILE) is more cleaner.

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