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Message-ID: <448486FB.8060007@google.com>
Date: Mon, 05 Jun 2006 12:33:15 -0700
From: Martin Bligh <mbligh@google.com>
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To: Christoph Lameter <clameter@sgi.com>
CC: Arjan van de Ven <arjan@infradead.org>, Andy Whitcroft <apw@shadowen.org>,
        "Martin J. Bligh" <mbligh@mbligh.org>, Andrew Morton <akpm@osdl.org>,
        linux-kernel@vger.kernel.org, ak@suse.de,
        Hugh Dickins <hugh@veritas.com>
Subject: Re: 2.6.17-rc5-mm1
References: <447DEF49.9070401@google.com>  <20060531140652.054e2e45.akpm@osdl.org> <447E093B.7020107@mbligh.org>  <20060531144310.7aa0e0ff.akpm@osdl.org> <447E104B.6040007@mbligh.org>  <447F1702.3090405@shadowen.org> <44842C01.2050604@shadowen.org>  <Pine.LNX.4.64.0606051137400.17951@schroedinger.engr.sgi.com> <1149533399.3111.120.camel@laptopd505.fenrus.org> <Pine.LNX.4.64.0606051151150.18056@schroedinger.engr.sgi.com> <44848283.3000207@google.com> <Pine.LNX.4.64.0606051216290.18264@schroedinger.engr.sgi.com>
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Christoph Lameter wrote:
> On Mon, 5 Jun 2006, Martin Bligh wrote:
> 
> 
>>>How was the kernel compiled? It must have been running on a NUMA system for
>>>page migration to be enabled. Otherwise the fallback definitions in
>>>include/linux/swapops.h should remove all the swap migration entry handling.
>>
>>x86_64 NUMA. Config is here:
>>http://ftp.kernel.org/pub/linux/kernel/people/mbligh/config/abat/amd64
>>
>>mtest01 was what killed it, IIRC.
> 
> 
> CONFIG_MIGRATION is not set, no CONFIG_MIGRATION entry is in .config, so 
> page migration was not compiled in. You also forgot to do "make oldconfig" 
> when building the kernel. If you do a "make oldconfig" then your kernel 
> will be build with page migration support.

No, that is the config it starts with, sorry ... that was misleading.
It then does makeoldconfig from there:

http://test.kernel.org/abat/34624/build/dotconfig

is teh one one from the -mm3 build

CONFIG_MIGRATION=y

> Either what we see is due to code rearrangement or there is something wrong with 
> the fallback definitions in include/linux/swapops.h. 
> 
> The swapless-pm-add-r-w-migration-entries.patch also introduces Hugh's 
> reversal of the anon_vma list.

OK, are those easily separable? Sounds like one good test would be to
force CONFIG_MIGRATION to =n, right?

M.