From: Christoph Lameter <clameter@sgi.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
riel@redhat.com, mbligh@mbligh.org, linux-mm@kvack.org,
nickpiggin@yahoo.com.au, a.p.zijlstra@chello.nl
Subject: Re: [RFC] Remove unswappable anonymous pages off the LRU
Date: Thu, 15 Feb 2007 21:25:53 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.64.0702152122520.2290@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20070215211617.a6e1cd5b.akpm@linux-foundation.org>
On Thu, 15 Feb 2007, Andrew Morton wrote:
> hm. We can calculate page_zone(page) from the pfn. And I suspect we can
> do that locklessly too. I bet a nice tight implementation of that would be
> efficient enough and it'll reclaim heaps of flags.
You mean encode the node and the zone_id in the pfn? Ummm... That would
get us into lots of trouble with pfn_to_page and friends.
The sparsemem section field could be available. A virtual
memmap based implementation would not need the section number and would
get rid of the sparsemem table lookups.Problem is that we cannot do it on
32 bit platforms because of the lack of virtual memory.
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next prev parent reply other threads:[~2007-02-16 5:25 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-15 21:05 [RFC] Remove unswappable anonymous pages off the LRU Christoph Lameter
2007-02-15 22:31 ` Rik van Riel
2007-02-15 22:41 ` Christoph Lameter
2007-02-15 22:50 ` Rik van Riel
2007-02-15 22:53 ` Christoph Lameter
2007-02-15 23:19 ` Andrew Morton
2007-02-15 23:20 ` Lee Schermerhorn
2007-02-16 0:15 ` Andrew Morton
2007-02-16 1:13 ` Andrew Morton
2007-02-16 1:24 ` KAMEZAWA Hiroyuki
2007-02-16 1:40 ` Martin Bligh
2007-02-16 1:49 ` Andrew Morton
2007-02-16 2:21 ` Martin Bligh
2007-02-16 2:34 ` Christoph Lameter
2007-02-16 2:48 ` Andrew Morton
2007-02-16 2:50 ` Christoph Lameter
2007-02-16 3:18 ` Andrew Morton
2007-02-16 3:36 ` Christoph Lameter
2007-02-16 3:42 ` Andrew Morton
2007-02-16 3:50 ` Christoph Lameter
2007-02-16 4:02 ` Andrew Morton
2007-02-16 4:07 ` Christoph Lameter
2007-02-16 4:03 ` Andrew Morton
2007-02-16 4:14 ` Rik van Riel
2007-02-16 4:15 ` Christoph Lameter
2007-02-16 4:57 ` KAMEZAWA Hiroyuki
2007-02-16 5:16 ` Andrew Morton
2007-02-16 5:25 ` Christoph Lameter [this message]
2007-02-16 5:41 ` Andrew Morton
2007-02-16 5:19 ` Christoph Lameter
2007-02-16 4:24 ` Andrew Morton
2007-02-16 8:15 ` Peter Zijlstra
2007-02-16 9:11 ` Rafael J. Wysocki
2007-02-16 9:19 ` Peter Zijlstra
2007-02-16 10:10 ` Christoph Lameter
2007-02-16 10:17 ` Peter Zijlstra
2007-02-16 11:04 ` Rafael J. Wysocki
2007-02-16 2:16 ` Christoph Lameter
2007-02-16 3:17 ` Martin Bligh
2007-02-16 3:29 ` Christoph Lameter
2007-02-16 8:10 ` Peter Zijlstra
2007-02-16 2:15 ` Christoph Lameter
2007-02-16 2:55 ` Christoph Lameter
2007-02-16 5:02 ` Christoph Lameter
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