linux-kernel - Re: powerpc boot regression

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Message-ID: <481A1399.8020304@am.sony.com>
Date:	Thu, 1 May 2008 12:01:45 -0700
From:	Geoff Levand <geoffrey.levand@...sony.com>
To:	Badari Pulavarty <pbadari@...il.com>
CC:	Tony Breeds <tony@...eyournoodle.com>,
	David Miller <davem@...emloft.net>,
	linux-kernel@...r.kernel.org, y-goto@...fujitsu.com,
	akpm@...ux-foundation.org, LinuxPPC-dev <linuxppc-dev@...abs.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: Re: powerpc boot regression

Badari Pulavarty wrote:
> On Thu, 2008-05-01 at 15:13 +1000, Tony Breeds wrote:
>> On Tue, Apr 29, 2008 at 11:12:41PM -0700, David Miller wrote:
>> > 
>> > This commit causes bootup failures on sparc64:
>> > 
>> > commit 86f6dae1377523689bd8468fed2f2dd180fc0560
>> > Author: Yasunori Goto <y-goto@...fujitsu.com>
>> > Date:   Mon Apr 28 02:13:33 2008 -0700
>> > 
>> >     memory hotplug: allocate usemap on the section with pgdat
>> 
>> 
>> <snip>
>> 
>> We're seeing a boot failure on powerpc.  git bisect points the problem
>> at this commit.   However reverting just this one comitt doesn't fix the
>> regression.  I also needed to revert
>> 04753278769f3b6c3b79a080edb52f21d83bf6e2 (memory hotplug: register
>> section/node id to free")
>> 
>> Problem seen on power4, power5 and ps3.
> 
> I don't see the problem on my power5 machine. Can you send the
> config ? Is CONFIG_SPARSEMEM_VMEMMAP enabled ?


The bug is hit with ps3_defconfig.  It does not have
CONFIG_SPARSEMEM_VMEMMAP set.


-Geoff

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