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From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Andrew Morton <akpm@osdl.org>
Cc: Christoph Lameter <clameter@sgi.com>,
	Russell King <rmk+lkml@arm.linux.org.uk>,
	Mel Gorman <mel@csn.ul.ie>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Christoph Lameter <clameter@engr.sgi.com>
Subject: Re: [PATCH 0/8] Create ZONE_MOVABLE to partition memory between movable and non-movable pages
Date: Tue, 30 Jan 2007 10:53:43 +0100	[thread overview]
Message-ID: <1170150823.6189.203.camel@twins> (raw)
In-Reply-To: <20070129160921.7b362c8d.akpm@osdl.org>

On Mon, 2007-01-29 at 16:09 -0800, Andrew Morton wrote:
> On Mon, 29 Jan 2007 15:37:29 -0800 (PST)
> Christoph Lameter <clameter@sgi.com> wrote:
> 
> > With a alloc_pages_range() one would be able to specify upper and lower 
> > boundaries.
> 
> Is there a proposal anywhere regarding how this would be implemented?

I'm guessing this will involve page migration.

Still, would we need to place bounds on non movable pages, or will it be
a best effort? It seems the current zone approach is a best effort too,
although it does try to keep allocations away from the lower zones as
much as possible.

But I guess we could make a single zone allocator prefer high addresses
too.

So then we'd end up with a single zone, and each allocation would give a
range. Try and pick a free page with as high an address as possible in
the given range. If no pages available in the given range try and move
some movable pages out of it.

This does of course involve finding free pages in a given range, and
identifying pages as movable.

And a gazillion trivial but tedious things I've forgotten. Christoph, is
this what you were getting at?



  reply	other threads:[~2007-01-30  9:55 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-25 23:44 Mel Gorman
2007-01-25 23:45 ` [PATCH 1/8] Add __GFP_MOVABLE for callers to flag allocations that may be migrated Mel Gorman
2007-01-26 12:27   ` Nick Piggin
2007-01-26 13:25     ` Mel Gorman
2007-01-25 23:45 ` [PATCH 2/8] Create the ZONE_MOVABLE zone Mel Gorman
2007-01-26 16:28   ` Christoph Lameter
2007-01-26 16:49     ` Mel Gorman
2007-01-29 17:28     ` Mel Gorman
2007-01-26 17:16   ` Christoph Lameter
2007-01-26 17:24     ` Mel Gorman
2007-01-26 17:25       ` Christoph Lameter
2007-01-26 17:38         ` Mel Gorman
2007-01-29 17:31     ` Mel Gorman
2007-01-25 23:45 ` [PATCH 3/8] Allow huge page allocations to use GFP_HIGH_MOVABLE Mel Gorman
2007-01-26 16:33   ` Christoph Lameter
2007-01-26 16:58     ` Mel Gorman
2007-01-26 17:04       ` Christoph Lameter
2007-01-26 17:20         ` Mel Gorman
2007-01-26 17:22           ` Christoph Lameter
2007-01-26 17:37             ` Mel Gorman
2007-01-26 17:45               ` Christoph Lameter
2007-01-26 17:53                 ` Mel Gorman
2007-01-26 18:20                   ` Christoph Lameter
2007-01-26 20:37                     ` Mel Gorman
2007-01-26 18:35                   ` Chris Friesen
2007-01-26 20:44                     ` Mel Gorman
2007-01-26 21:37                       ` Chris Friesen
2007-01-25 23:46 ` [PATCH 4/8] x86 - Specify amount of kernel memory at boot time Mel Gorman
2007-01-25 23:46 ` [PATCH 5/8] ppc and powerpc " Mel Gorman
2007-01-25 23:46 ` [PATCH 6/8] x86_64 " Mel Gorman
2007-01-25 23:47 ` [PATCH 7/8] ia64 " Mel Gorman
2007-01-25 23:47 ` [PATCH 8/8] Add documentation for additional boot parameter and sysctl Mel Gorman
2007-01-26 11:07 ` [PATCH 0/8] Create ZONE_MOVABLE to partition memory between movable and non-movable pages Andrew Morton
2007-01-26 14:29   ` Mel Gorman
2007-01-26 16:01     ` Christoph Lameter
2007-01-26 15:56   ` Christoph Lameter
2007-01-26 19:46     ` Andrew Morton
2007-01-26 19:58       ` Christoph Lameter
2007-01-26 20:27         ` Andrew Morton
2007-01-29 21:54           ` Christoph Lameter
2007-01-29 22:36             ` Andrew Morton
2007-01-29 22:45               ` Christoph Lameter
2007-01-29 22:50                 ` Russell King
2007-01-29 23:37                   ` Christoph Lameter
2007-01-30  0:09                     ` Andrew Morton
2007-01-30  9:53                       ` Peter Zijlstra [this message]
2007-02-02  5:27                         ` Christoph Lameter
2007-02-02  5:22                       ` Christoph Lameter
2007-01-26 16:21 ` Christoph Lameter
2007-01-26 16:48   ` Mel Gorman
2007-01-26 17:02     ` Christoph Lameter
2007-01-26 17:20       ` Mel Gorman

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