linux-kernel - Re: BUG: 1bbbbe7 (x86: Exclude E820_RESERVED regions...) PANIC on boot

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Message-ID: <CAE9FiQVt5LN6_wDvS2G+UULD4Ba2CF=zLhg4RULSKbfbct0NLg@mail.gmail.com>
Date:	Mon, 22 Oct 2012 14:25:25 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	"H. Peter Anvin" <hpa@...ux.intel.com>
Cc:	Jacob Shin <jacob.shin@....com>, Tom Rini <trini@...com>,
	hpa@...or.com,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"stable@...nel.org" <stable@...nel.org>
Subject: Re: BUG: 1bbbbe7 (x86: Exclude E820_RESERVED regions...) PANIC on boot

On Mon, Oct 22, 2012 at 1:52 PM, H. Peter Anvin <hpa@...ux.intel.com> wrote:
> On 10/22/2012 01:50 PM, Yinghai Lu wrote:
>> ok, let's see if we can meet this extreme corner case except user
>> specify not page aligned "memmap="
>
> If it is *only* memmap= there is a very simple solution: if the memmap
> is RAM then we round up the starting address and round down the end
> address; if the memmap is not RAM then we round up instead...

We never know that bios guys will not let bios produce crazy e820 map.
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