linux-kernel - Re: [patch] tip/x86_64: fix e820 merge issue which broke max_pfn

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Date:	Tue, 8 Jul 2008 17:59:39 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Suresh Siddha" <suresh.b.siddha@...el.com>
Cc:	mingo@...e.hu, hpa@...or.com, tglx@...utronix.de,
	linux-kernel@...r.kernel.org
Subject: Re: [patch] tip/x86_64: fix e820 merge issue which broke max_pfn_mapped

On Tue, Jul 8, 2008 at 4:08 PM, Suresh Siddha <suresh.b.siddha@...el.com> wrote:
> With out this 64bit tip/master doesn't boot using ACPI on my system.
> ---
>
> max_pfn_mapped should include all e820 entries.
> The direct mapping extends to max_pfn_mapped, so that we can directly access
> apertures, ACPI and other tables without having to play with fixmaps.
>
> With this, my system with 1GB memory boots fine with ACPI enabled.

so without this patch, your system doesn't boot?

YH
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