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Date: Thu, 10 Jul 2008 09:00:12 +0200
From: Ingo Molnar <mingo@elte.hu>
To: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>, "H. Peter Anvin" <hpa@zytor.com>,
       LKML <linux-kernel@vger.kernel.org>,
       Suresh Siddha <suresh.b.siddha@intel.com>,
       Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: [PATCH] x86: make e820_end return end_of_ram again for 64bit
Message-ID: <20080710070012.GC14377@elte.hu>
References: <200807080141.05436.yhlu.kernel@gmail.com> <200807092015.03004.yhlu.kernel@gmail.com> <200807092016.36490.yhlu.kernel@gmail.com> <200807092017.51004.yhlu.kernel@gmail.com>
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* Yinghai Lu <yhlu.kernel@gmail.com> wrote:

> even for 64bit system with less 4G, we can use fixmap to handle acpi 
> sit near end of ram

ok - applied to tip/x86/core - lets see whether Suresh's system now 
works fine with this change.

> change e820_end to e820_end_of_ram again?
> or e820_ram_pfn?

i'd suggest e820_end_of_ram_pfn().

we now have symmetric behavior on 32-bit and 64-bit, e820_end() returns 
the true end of RAM. (64-bit used to return the last PFN mentioned in 
the e820 map - i.e. ACPI tables and other end of RAM items could have 
been included)

	Ingo