linux-kernel - Re: [PATCH] page allocator: Reduce fragmentation in buddy allocator by adding buddies that are merging to the tail of the free lists

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] [day] [month] [year] [list]

Message-ID: <4B41F572.3080406@redhat.com>
Date:	Mon, 04 Jan 2010 09:04:34 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Mel Gorman <mel@....ul.ie>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Corrado Zoccolo <czoccolo@...il.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] page allocator: Reduce fragmentation in buddy allocator
 by	adding buddies that are merging to the tail of the free lists

On 01/04/2010 08:55 AM, Mel Gorman wrote:
> From: Corrado Zoccolo<czoccolo@...il.com>
>
> In order to reduce fragmentation, this patch classifies freed pages in
> two groups according to their probability of being part of a high order
> merge. Pages belonging to a compound whose next-highest buddy is free are
> more likely to be part of a high order merge in the near future, so they
> will be added at the tail of the freelist. The remaining pages are put at
> the front of the freelist.

> [mel@....ul.ie: Tested, reworked for less branches]
> Signed-off-by: Mel Gorman<mel@....ul.ie>

Acked-by: Rik van Riel <riel@...hat.com>

-- 
All rights reversed.
--
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/