From: Rik van Riel <riel@conectiva.com.br>
To: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>
Cc: Linus Torvalds <torvalds@transmeta.com>,
Craig Kulesa <ckulesa@as.arizona.edu>,
Ingo Molnar <mingo@elte.hu>, Dave Jones <davej@suse.de>,
Daniel Phillips <phillips@bonn-fries.net>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
rwhron@earthlink.net
Subject: Re: [PATCH] (1/2) reverse mapping VM for 2.5.23 (rmap-13b)
Date: Mon, 24 Jun 2002 18:39:51 -0300 (BRT) [thread overview]
Message-ID: <Pine.LNX.4.44L.0206241837400.18418-100000@imladris.surriel.com> (raw)
In-Reply-To: <6660000.1024954471@flay>
On Mon, 24 Jun 2002, Martin J. Bligh wrote:
> A quick rough calculation indicates that the Oracle test I was helping
> out with was consuming almost 10Gb of PTEs without rmap - 30Gb for
> overhead doesn't sound like fun to me ;-(
10 GB is already bad enough that rmap isn't so much causing
a problem but increasing an already untolerable problem.
For the large SHM segment you'd probably want to either use
large pages or shared page tables ... in each of these cases
the rmap overhead will disappear together with the page table
overhead.
Now we just need volunteers for the implementation ;)
kind regards,
Rik
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next prev parent reply other threads:[~2002-06-24 21:39 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-19 11:18 Craig Kulesa
2002-06-19 16:18 ` Andrew Morton
2002-06-19 17:00 ` Daniel Phillips
2002-06-19 17:11 ` Dave Jones
2002-06-19 17:35 ` Rik van Riel
2002-06-19 19:53 ` Ingo Molnar
2002-06-19 20:21 ` Craig Kulesa
2002-06-19 20:24 ` Linus Torvalds
2002-06-20 12:25 ` VM benchmarks for 2.5 (mainline & rmap patches) Craig Kulesa
2002-06-24 21:34 ` [PATCH] (1/2) reverse mapping VM for 2.5.23 (rmap-13b) Martin J. Bligh
2002-06-24 21:39 ` Rik van Riel [this message]
2002-06-24 21:56 ` Martin J. Bligh
2002-07-04 5:19 ` Daniel Phillips
2002-06-24 15:02 ` Rik van Riel
2002-06-19 19:04 ` Steven Cole
2002-06-19 22:44 ` William Lee Irwin III
2002-06-20 12:08 ` [PATCH] Updated rmap VM for 2.5.23 (SMP, preempt fixes) Craig Kulesa
2002-06-20 12:45 ` Craig Kulesa
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