From: Andrew Morton <akpm@linux-foundation.org>
To: Andi Kleen <andi@firstfloor.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
Christoph Lameter <clameter@sgi.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
David Miller <davem@davemloft.net>,
Daniel Phillips <phillips@google.com>,
Pekka Enberg <penberg@cs.helsinki.fi>,
Matt Mackall <mpm@selenic.com>,
Lee Schermerhorn <Lee.Schermerhorn@hp.com>,
Steve Dickson <SteveD@redhat.com>
Subject: Re: [PATCH 03/10] mm: tag reseve pages
Date: Mon, 6 Aug 2007 12:10:53 -0700 [thread overview]
Message-ID: <20070806121053.baed9691.akpm@linux-foundation.org> (raw)
In-Reply-To: <20070806185926.GB22499@one.firstfloor.org>
On Mon, 6 Aug 2007 20:59:26 +0200 Andi Kleen <andi@firstfloor.org> wrote:
> > precious page flag
>
> I always cringe when I hear that. It's really more than node/sparsemem
> use too many bits. If we get rid of 32bit NUMA that problem would be
> gone for the node at least because it could be moved into the mostly
> unused upper 32bit part on 64bit architectures.
Removing 32-bit NUMA is attractive - NUMAQ we can probably live without,
not sure about summit. But superh is starting to use NUMA now, due to
varying access times of various sorts of memory, and one can envisage other
embedded setups doing that.
Plus I don't think there are many flags left in the upper 32-bits. ia64
swooped in and gobbled lots of them, although it's not immediately clear
how many were consumed.
> The alternative would be to investigate again what it does to the
> kernel to just use different lookup methods for this.
That's cringeworthy too, I expect.
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next prev parent reply other threads:[~2007-08-06 19:10 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-06 10:29 [PATCH 00/10] foundations for reserve-based allocation Peter Zijlstra
2007-08-06 10:29 ` [PATCH 01/10] mm: gfp_to_alloc_flags() Peter Zijlstra
2007-08-06 10:29 ` [PATCH 02/10] mm: system wide ALLOC_NO_WATERMARK Peter Zijlstra
2007-08-06 18:11 ` Christoph Lameter
2007-08-06 18:21 ` Daniel Phillips
2007-08-06 18:31 ` Peter Zijlstra
2007-08-06 18:43 ` Daniel Phillips
2007-08-06 19:11 ` Christoph Lameter
2007-08-06 19:31 ` Peter Zijlstra
2007-08-06 20:12 ` Christoph Lameter
2007-08-06 18:42 ` Christoph Lameter
2007-08-06 18:48 ` Daniel Phillips
2007-08-06 18:51 ` Christoph Lameter
2007-08-06 19:15 ` Daniel Phillips
2007-08-06 20:12 ` Matt Mackall
2007-08-06 20:19 ` Christoph Lameter
2007-08-06 20:26 ` Peter Zijlstra
2007-08-06 21:05 ` Christoph Lameter
2007-08-06 22:59 ` Daniel Phillips
2007-08-06 23:14 ` Christoph Lameter
2007-08-06 23:49 ` Daniel Phillips
2007-08-07 22:18 ` Christoph Lameter
2007-08-08 7:24 ` Peter Zijlstra
2007-08-08 18:06 ` Christoph Lameter
2007-08-08 7:37 ` Daniel Phillips
2007-08-08 18:09 ` Christoph Lameter
2007-08-09 18:41 ` Daniel Phillips
2007-08-09 18:49 ` Christoph Lameter
2007-08-10 0:17 ` Daniel Phillips
2007-08-10 1:48 ` Christoph Lameter
2007-08-10 3:34 ` Daniel Phillips
2007-08-10 3:48 ` Christoph Lameter
2007-08-10 8:15 ` Daniel Phillips
2007-08-10 17:46 ` Christoph Lameter
2007-08-10 23:25 ` Daniel Phillips
2007-08-13 6:55 ` Daniel Phillips
2007-08-13 23:04 ` Christoph Lameter
2007-08-06 20:27 ` Andrew Morton
2007-08-06 23:16 ` Daniel Phillips
2007-08-06 22:47 ` Daniel Phillips
2007-08-06 10:29 ` [PATCH 03/10] mm: tag reseve pages Peter Zijlstra
2007-08-06 18:11 ` Christoph Lameter
2007-08-06 18:13 ` Daniel Phillips
2007-08-06 18:28 ` Peter Zijlstra
2007-08-06 19:34 ` Andi Kleen
2007-08-06 18:43 ` Christoph Lameter
2007-08-06 18:47 ` Peter Zijlstra
2007-08-06 18:59 ` Andi Kleen
2007-08-06 19:09 ` Christoph Lameter
2007-08-06 19:10 ` Andrew Morton [this message]
2007-08-06 19:16 ` Christoph Lameter
2007-08-06 19:38 ` Matt Mackall
2007-08-06 20:18 ` Andi Kleen
2007-08-06 10:29 ` [PATCH 04/10] mm: slub: add knowledge of reserve pages Peter Zijlstra
2007-08-08 0:13 ` Christoph Lameter
2007-08-08 1:44 ` Matt Mackall
2007-08-08 17:13 ` Christoph Lameter
2007-08-08 17:39 ` Andrew Morton
2007-08-08 17:57 ` Christoph Lameter
2007-08-08 18:46 ` Andrew Morton
2007-08-10 1:54 ` Daniel Phillips
2007-08-10 2:01 ` Christoph Lameter
2007-08-20 7:38 ` Peter Zijlstra
2007-08-20 7:43 ` Peter Zijlstra
2007-08-20 9:12 ` Pekka J Enberg
2007-08-20 9:17 ` Peter Zijlstra
2007-08-20 9:28 ` Pekka Enberg
2007-08-20 19:26 ` Christoph Lameter
2007-08-20 20:08 ` Peter Zijlstra
2007-08-06 10:29 ` [PATCH 05/10] mm: allow mempool to fall back to memalloc reserves Peter Zijlstra
2007-08-06 10:29 ` [PATCH 06/10] mm: kmem_estimate_pages() Peter Zijlstra
2007-08-06 10:29 ` [PATCH 07/10] mm: allow PF_MEMALLOC from softirq context Peter Zijlstra
2007-08-06 10:29 ` [PATCH 08/10] mm: serialize access to min_free_kbytes Peter Zijlstra
2007-08-06 10:29 ` [PATCH 09/10] mm: emergency pool Peter Zijlstra
2007-08-06 10:29 ` [PATCH 10/10] mm: __GFP_MEMALLOC Peter Zijlstra
2007-08-06 17:35 ` [PATCH 00/10] foundations for reserve-based allocation Daniel Phillips
2007-08-06 18:17 ` Peter Zijlstra
2007-08-06 18:40 ` Daniel Phillips
2007-08-06 19:31 ` Daniel Phillips
2007-08-06 19:36 ` Peter Zijlstra
2007-08-06 19:53 ` Daniel Phillips
2007-08-06 17:56 ` Christoph Lameter
2007-08-06 18:33 ` Peter Zijlstra
2007-08-06 20:23 ` Matt Mackall
2007-08-07 0:09 ` Daniel Phillips
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