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Date: Fri, 15 Feb 2008 09:55:01 +0100
From: Andi Kleen <andi@firstfloor.org>
To: "Huang, Ying" <ying.huang@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>, Andi Kleen <andi@firstfloor.org>,
       torvalds@osdl.org, tglx@linutronix.de, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Fix left over EFI cache mapping problems
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References: <20080214131317.GA27769@basil.nowhere.org> <20080214161218.GA28152@elte.hu> <20080214171603.GC16255@one.firstfloor.org> <20080214183819.GA19846@elte.hu> <1203043953.30010.14.camel@caritas-dev.intel.com>
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> But because end_pfn_map contains the above UC memory area, efi_ioremap()
> is not used on EFI 64.

I see. It would be a good idea if you could test with a limited
memmap (mem=... command line option) just to make sure this path works

Right now I don't think pageattr.c will deal fully correct with 
the fixmap, but if the git-x86#mm changes are pushed for .25
it might actually work.

-Andi