linux-kernel - Re: [stable] 2.6.23 boot failures on x86-64.

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Message-ID: <Pine.LNX.4.64.0710291247510.845@schroedinger.engr.sgi.com>
Date:	Mon, 29 Oct 2007 12:51:49 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
cc:	Greg KH <greg@...ah.com>, Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Martin Ebourne <fedora@...urne.me.uk>,
	Zou Nan hai <nanhai.zou@...el.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Andi Kleen <ak@...e.de>, stable@...nel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andy Whitcroft <apw@...dowen.org>, Mel Gorman <mel@....ul.ie>
Subject: Re: [stable] 2.6.23 boot failures on x86-64.

On Mon, 29 Oct 2007, Linus Torvalds wrote:

> We've had some changes since 2.6.23, and afaik, the 
> "alloc_bootmem_high_node()" code is alreadt effectively dead there. It's 
> only called if CONFIG_SPARSEMEM_VMEMMAP is *not* enabled, and I *think* we 
> enable it by force on x86-64 these days.

CONFIG_SPARSEMEM_VMEMMAP was introduced in 2.6.24-rc1.

If I read this Kconfig.x86_64 correctly then it seems that DISCONTIG is 
still the default. Andy?

config ARCH_DISCONTIGMEM_ENABLE
       bool
       depends on NUMA
       default y

config ARCH_DISCONTIGMEM_DEFAULT
        def_bool y
        depends on NUMA

config ARCH_SPARSEMEM_ENABLE
        def_bool y
        depends on (NUMA || EXPERIMENTAL)
        select SPARSEMEM_VMEMMAP_ENABLE

config ARCH_MEMORY_PROBE
        def_bool y
        depends on MEMORY_HOTPLUG

config ARCH_FLATMEM_ENABLE
        def_bool y
        depends on !NUMA
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