From: Rik van Riel <riel@redhat.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, lee.schermerhorn@hp.com,
kosaki.motohiro@jp.fujitsu.com, linux-mm@kvack.org,
eric.whitney@hp.com
Subject: Re: [PATCH -mm 13/25] Noreclaim LRU Infrastructure
Date: Sun, 8 Jun 2008 22:58:00 -0400 [thread overview]
Message-ID: <20080608225800.17d2e29b@bree.surriel.com> (raw)
In-Reply-To: <20080608165434.67c87e5c.akpm@linux-foundation.org>
On Sun, 8 Jun 2008 16:54:34 -0700
Andrew Morton <akpm@linux-foundation.org> wrote:
> ho hum. Can you remind us what problems this patchset actually
> addresses? Preferably in order of seriousness?
Here are some other problems that my patch series can easily fix,
because file cache and anon/swap backed pages live on separate
LRUs:
http://feedblog.org/2007/09/29/using-o_direct-on-linux-and-innodb-to-fix-swap-insanity/
http://blogs.smugmug.com/don/2008/05/01/mysql-and-the-linux-swap-problem/
I do not know for sure whether the patch set does fix it yet for
everyone, or whether it needs some more tuning first, but it is
fairly easily fixable by tweaking the relative pressure on both
sets of LRU lists.
No tricks of skipping over one type of pages while scanning, or
treating the referenced bits differently when the moon is in some
particular phase required - one set of lists for each type of
pages, and variable pressure between the two.
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next prev parent reply other threads:[~2008-06-09 2:58 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20080606202838.390050172@redhat.com>
2008-06-06 20:28 ` Rik van Riel, Rik van Riel
2008-06-07 1:05 ` Andrew Morton
2008-06-08 20:34 ` Rik van Riel
2008-06-08 20:57 ` Andrew Morton
2008-06-08 21:32 ` Rik van Riel
2008-06-08 21:43 ` Ray Lee
2008-06-08 23:22 ` Andrew Morton
2008-06-08 23:34 ` Rik van Riel
2008-06-08 23:54 ` Andrew Morton
2008-06-09 0:56 ` Rik van Riel
2008-06-09 6:10 ` Andrew Morton
2008-06-09 13:44 ` Rik van Riel
2008-06-09 2:58 ` Rik van Riel [this message]
2008-06-09 5:44 ` Andrew Morton
2008-06-10 19:17 ` Christoph Lameter
2008-06-10 19:37 ` Rik van Riel
2008-06-10 21:33 ` Andrew Morton
2008-06-10 21:48 ` Andi Kleen
2008-06-10 22:05 ` Dave Hansen
2008-06-11 5:09 ` Paul Mundt
2008-06-11 6:16 ` Andrew Morton
2008-06-11 6:29 ` Paul Mundt
2008-06-11 12:06 ` Andi Kleen
2008-06-11 14:09 ` Removing node flags from page->flags was Re: [PATCH -mm 13/25] Noreclaim LRU Infrastructure II Andi Kleen
2008-06-11 19:03 ` [PATCH -mm 13/25] Noreclaim LRU Infrastructure Andy Whitcroft
2008-06-11 20:52 ` Andi Kleen
2008-06-11 23:25 ` Christoph Lameter
2008-06-08 22:03 ` Rik van Riel
2008-06-08 21:07 ` KOSAKI Motohiro
2008-06-10 20:09 ` Rik van Riel
2008-06-06 20:28 ` [PATCH -mm 15/25] Ramfs and Ram Disk pages are non-reclaimable Rik van Riel, Rik van Riel
2008-06-07 1:05 ` Andrew Morton
2008-06-08 4:32 ` Greg KH
2008-06-06 20:28 ` [PATCH -mm 17/25] Mlocked Pages " Rik van Riel, Rik van Riel
2008-06-07 1:07 ` Andrew Morton
2008-06-07 5:38 ` KOSAKI Motohiro
2008-06-10 3:31 ` Nick Piggin
2008-06-10 12:50 ` Rik van Riel
2008-06-10 21:14 ` Rik van Riel
2008-06-10 21:43 ` Lee Schermerhorn
2008-06-10 21:57 ` Andrew Morton
2008-06-11 16:01 ` Lee Schermerhorn
2008-06-10 23:48 ` Rik van Riel
2008-06-11 15:29 ` Lee Schermerhorn
2008-06-11 1:00 ` Rik van Riel
2008-06-06 20:28 ` [PATCH -mm 19/25] Handle mlocked pages during map, remap, unmap Rik van Riel, Rik van Riel
2008-06-06 20:28 ` [PATCH -mm 21/25] Cull non-reclaimable pages in fault path Rik van Riel, Rik van Riel, Lee Schermerhorn
2008-06-06 20:29 ` [PATCH -mm 23/25] Noreclaim LRU scan sysctl Rik van Riel, Rik van Riel, Lee Schermerhorn
2008-06-06 20:29 ` [PATCH -mm 25/25] Noreclaim LRU and Mlocked Pages Documentation Rik van Riel, Rik van Riel
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