From: Daniel Phillips <phillips@arcor.de>
To: Dave McCracken <dmccr@us.ibm.com>,
Linux Memory Management <linux-mm@kvack.org>
Cc: Andrew Morton <akpm@zip.com.au>
Subject: Re: [PATCH] Optimize away pte_chains for single mappings
Date: Sat, 13 Jul 2002 15:13:35 +0200 [thread overview]
Message-ID: <E17TMiO-0003IR-00@starship> (raw)
In-Reply-To: <55160000.1026239746@baldur.austin.ibm.com>
On Tuesday 09 July 2002 20:35, Dave McCracken wrote:
>
> Here's a patch that optimizes out using a struct pte_chain when there's
> only one mapping for that page. It re-uses the pte_chain pointer in struct
> page, with an appropriate flag. The patch is based on Rik's latest 2.5.25
> rmap patch.
>
> I've done basic testing on it (it boots and runs simple commands).
>
> This version of the patch uses an anonymous union, so it only builds with
> gcc 3.x. I'm working on an alternate version of the patch, but wanted to
> get this one out for people to look at.
Why are we using up valuable real estate in page->flags when the low bit
of page->pte_chain is available?
--
Daniel
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next prev parent reply other threads:[~2002-07-13 13:13 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-09 18:35 Dave McCracken
2002-07-13 13:13 ` Daniel Phillips [this message]
2002-07-15 14:02 ` Dave McCracken
2002-07-15 14:56 ` Daniel Phillips
2002-07-15 15:40 ` Matti Aarnio
2002-07-15 16:10 ` Daniel Phillips
2002-07-15 16:34 ` Rik van Riel
2002-07-15 16:42 ` Daniel Phillips
2002-07-15 20:57 ` Andrew Morton
2002-07-16 4:50 ` Daniel Phillips
2002-07-15 16:30 ` Daniel Phillips
2002-07-15 16:55 ` Matti Aarnio
2002-07-15 17:50 ` Daniel Phillips
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