linux-kernel - Re: [PATCH v2 01/13] mm: support madvise(MADV

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 for Android: free password hash cracker in your pocket

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

Message-ID: <563BB855.6020304@gmail.com>
Date:	Thu, 5 Nov 2015 15:13:09 -0500
From:	Daniel Micay <danielmicay@...il.com>
To:	Shaohua Li <shli@...nel.org>
Cc:	Andy Lutomirski <luto@...capital.net>,
	Minchan Kim <minchan@...nel.org>,
	Hugh Dickins <hughd@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Michael Kerrisk <mtk.manpages@...il.com>,
	Michal Hocko <mhocko@...e.cz>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Linux API <linux-api@...r.kernel.org>, Jason Evans <je@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	yalin wang <yalin.wang2010@...il.com>,
	Mel Gorman <mgorman@...e.de>
Subject: Re: [PATCH v2 01/13] mm: support madvise(MADV_FREE)

> I posted a patch doing exactly iovec madvise. Doesn't support MADV_FREE yet
> though, but should be easy to do it.
> 
> http://marc.info/?l=linux-mm&m=144615663522661&w=2

I think that would be a great way to deal with this. It keeps the nice
property of still being able to drop pages in allocations that have been
handed out but not yet touched. The allocator just needs to be designed
to do lots of purging in one go (i.e. something like an 8:1 active:clean
ratio triggers purging and it goes all the way to 16:1).


Download attachment "signature.asc" of type "application/pgp-signature" (820 bytes)