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From: Dave Hansen <haveblue@us.ibm.com>
To: Andrew Morton <akpm@osdl.org>
Cc: Matthew Wilcox <matthew@wil.cx>,
	jes@wildopensource.com, linux-ia64@vger.kernel.org,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [patch -mm series] ia64 specific /dev/mem handlers
Date: Tue, 22 Feb 2005 19:35:38 +0000	[thread overview]
Message-ID: <1109100938.25666.44.camel@localhost> (raw)
In-Reply-To: <20050222112513.4162860d.akpm@osdl.org>

I was talking with Nigel Cunningham about doing something a little
different from the classic page flag bits when the number of users is
restricted and performance isn't ultra-critical.  Would something like
this work for you, instead of using a real page->flags bit for
PG_cached?

http://marc.theaimsgroup.com/?l=linux-kernel&m\x110878103926956&w=2

BTW, they're planning on using two of those dynamic flags for software
suspend, and I'll probably use at least another two in the memory
hotplug code.  

-- Dave


WARNING: multiple messages have this Message-ID (diff)
From: Dave Hansen <haveblue@us.ibm.com>
To: Andrew Morton <akpm@osdl.org>
Cc: Matthew Wilcox <matthew@wil.cx>,
	jes@wildopensource.com, linux-ia64@vger.kernel.org,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [patch -mm series] ia64 specific /dev/mem handlers
Date: Tue, 22 Feb 2005 11:35:38 -0800	[thread overview]
Message-ID: <1109100938.25666.44.camel@localhost> (raw)
In-Reply-To: <20050222112513.4162860d.akpm@osdl.org>

I was talking with Nigel Cunningham about doing something a little
different from the classic page flag bits when the number of users is
restricted and performance isn't ultra-critical.  Would something like
this work for you, instead of using a real page->flags bit for
PG_cached?

http://marc.theaimsgroup.com/?l=linux-kernel&m=110878103926956&w=2

BTW, they're planning on using two of those dynamic flags for software
suspend, and I'll probably use at least another two in the memory
hotplug code.  

-- Dave


  reply	other threads:[~2005-02-22 19:35 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-02-22  9:52 [patch -mm series] ia64 specific /dev/mem handlers Jes Sorensen
2005-02-22  9:52 ` Jes Sorensen
2005-02-22 10:03 ` Andrew Morton
2005-02-22 10:03   ` Andrew Morton
2005-02-22 12:08   ` Andi Kleen
2005-02-22 12:08     ` Andi Kleen
2005-02-22 14:41   ` Jes Sorensen
2005-02-22 14:41     ` Jes Sorensen
2005-02-22 17:52     ` Matthew Wilcox
2005-02-22 19:25       ` Andrew Morton
2005-02-22 19:25         ` Andrew Morton
2005-02-22 19:35         ` Dave Hansen [this message]
2005-02-22 19:35           ` Dave Hansen
2005-02-22 21:38           ` Jes Sorensen
2005-02-22 21:38             ` Jes Sorensen
2005-02-23  0:48             ` Dave Hansen
2005-02-23  0:48               ` Dave Hansen
2005-02-22 21:34         ` Jes Sorensen
2005-02-22 21:34           ` Jes Sorensen
2005-02-22 22:39         ` Jes Sorensen
2005-02-22 22:39           ` Jes Sorensen
2005-02-22 23:34           ` Andrew Morton
2005-02-22 23:34             ` Andrew Morton
2005-02-23 10:01             ` Jes Sorensen
2005-02-23 10:01               ` Jes Sorensen
2005-02-23 22:34               ` Christoph Hellwig
2005-02-24 16:11                 ` Jes Sorensen
2005-02-24 16:11                   ` Jes Sorensen
2005-03-10  6:55                   ` Andrew Morton
2005-03-10  6:55                     ` Andrew Morton
2005-03-10 13:49                     ` Jes Sorensen
2005-03-10 13:49                       ` Jes Sorensen
2005-02-22 18:05 ` Luck, Tony
2005-02-22 18:05   ` Luck, Tony
2005-02-22 22:03 ` Arjan van de Ven
2005-02-22 22:03   ` Arjan van de Ven
2005-02-22 22:30   ` Jes Sorensen
2005-02-22 22:30     ` Jes Sorensen
2005-02-22 22:42     ` Arjan van de Ven
2005-02-22 22:42       ` Arjan van de Ven
2005-02-23  8:12       ` Jes Sorensen
2005-02-23  8:12         ` Jes Sorensen
2005-02-23  8:24         ` Arjan van de Ven
2005-02-23  8:24           ` Arjan van de Ven
2005-03-03 11:37 ` Andrew Morton
2005-03-03 11:37   ` Andrew Morton
2005-03-03 12:53   ` Jes Sorensen
2005-03-03 12:53     ` Jes Sorensen
2005-03-04 12:26     ` Jes Sorensen
2005-03-04 12:26       ` Jes Sorensen

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