linux-kernel - Re: Android low memory killer vs. memory pressure notifications

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 19 Dec 2011 11:12:09 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Michal Hocko <mhocko@...e.cz>
cc:	Anton Vorontsov <anton.vorontsov@...aro.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Arve Hjønnevåg <arve@...roid.com>,
	Rik van Riel <riel@...hat.com>, Pavel Machek <pavel@....cz>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	John Stultz <john.stultz@...aro.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Johannes Weiner <hannes@...xchg.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: Android low memory killer vs. memory pressure notifications

On Mon, 19 Dec 2011, Michal Hocko wrote:

> page_cgroup is 16B per page and with the current Johannes' memcg
> naturalization work (in the mmotm tree) we are down to 8B per page (we
> got rid of lru). Kamezawa has some patches to get rid of the flags so we
> will be down to 4B per page on 32b. Is this still too much?
> I would be really careful about a yet another lowmem notification
> mechanism.
> 

There was always general interest in a low memory notification mechanism 
even prior to memcg, see http://lwn.net/Articles/268732/ from Marcelo and 
KOSAKI-san.  The desire is not only to avoid the metadata overhead of 
memcg, but also to avoid cgroups entirely.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/