Hi,
So I saw the latest kernel moves paging_init before reading the MP tables.
My question is this... on our systems, the MP tables will be in the BIOS
protected area (ie the area that the e820 call will report as unusable).
Will the de-reference of such an address still work once paging_init has
been called? Also, is this intended to work because paging_init installs
translations for all available RAM?
Best Wishes,
Lyle
++++++++++++++++++++++++++++++++++++++
Systems Programmer, Compaq Corporation
(Not speaking for Compaq)
>From: Ingo Molnar <mingo@chiara.csoma.elte.hu>
>To: Linus Torvalds <torvalds@transmeta.com>
>CC: linux-kernel@vger.rutgers.edu, Lyle Coder <x_coder@hotmail.com>, Alan
>Cox <alan@lxorguk.ukuu.org.uk>
>Subject: [patch] smp-2.3.48-B2, MP config table in high memory
>Date: Fri, 25 Feb 2000 23:29:34 +0100 (CET)
>
>
> > Not surprising. We probably have tons of small ordering assumptions
> > that just never came up..
>
>it just turned out to be a single assumption: init_apic_mappings() must
>happen after init_smp_config(). (this also explains my crash)
>
>The attached smp-2.3.48-B2 patch (against pre2-2.3.48) boots just fine
>here. The reserve_bootmem() thing might just be paranoia - is there any
>conceivable possibility that pagetable_init() overwrites the MP table?
>
>Lyle, could you check out this patch on your 'interesting' system? Thanks.
>
> Ingo
>
><< smp-2.3.48-B2 >>
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