From: Andrew Morton <akpm@osdl.org>
To: Mel Gorman <mel@csn.ul.ie>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/8] Avoiding fragmentation with subzone groupings v25
Date: Thu, 7 Sep 2006 17:58:48 -0700 [thread overview]
Message-ID: <20060907175848.63379fe1.akpm@osdl.org> (raw)
In-Reply-To: <20060907190342.6166.49732.sendpatchset@skynet.skynet.ie>
On Thu, 7 Sep 2006 20:03:42 +0100 (IST)
Mel Gorman <mel@csn.ul.ie> wrote:
> When a page is allocated, the page-flags
> are updated with a value indicating it's type of reclaimability so that it
> is placed on the correct list on free.
We're getting awful tight on page-flags.
Would it be possible to avoid adding the flag? Say, have a per-zone bitmap
of size (zone->present_pages/(1<<MAX_ORDER)) bits, then do a lookup in
there to work out whether a particular page is within a MAX_ORDER clump of
easy-reclaimable pages?
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next prev parent reply other threads:[~2006-09-08 0:58 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-07 19:03 Mel Gorman
2006-09-07 19:04 ` [PATCH 1/8] Add __GFP_EASYRCLM flag and update callers Mel Gorman
2006-09-07 19:04 ` [PATCH 2/8] Split the free lists into kernel and user parts Mel Gorman
2006-09-08 7:54 ` Peter Zijlstra
2006-09-08 9:20 ` Mel Gorman
2006-09-07 19:04 ` [PATCH 3/8] Split the per-cpu " Mel Gorman
2006-09-07 19:05 ` [PATCH 4/8] Add a configure option for anti-fragmentation Mel Gorman
2006-09-07 19:05 ` [PATCH 5/8] Drain per-cpu lists when high-order allocations fail Mel Gorman
2006-09-07 19:05 ` [PATCH 6/8] Move free pages between lists on steal Mel Gorman
2006-09-07 19:06 ` [PATCH 7/8] Introduce the RCLM_KERN allocation type Mel Gorman
2006-09-07 19:06 ` [PATCH 8/8] [DEBUG] Add statistics Mel Gorman
2006-09-08 0:58 ` Andrew Morton [this message]
2006-09-08 8:30 ` [PATCH 0/8] Avoiding fragmentation with subzone groupings v25 Peter Zijlstra
2006-09-08 9:24 ` Mel Gorman
2006-09-08 8:36 ` Mel Gorman
2006-09-08 13:06 ` Peter Zijlstra
2006-09-08 13:16 ` Mel Gorman
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