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

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Date:	Mon, 22 Oct 2012 14:27:38 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Jacob Shin <jacob.shin@....com>, Tom Rini <trini@...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 10/22/2012 02:25 PM, Yinghai Lu wrote:
> 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.
> 

Yeah, well, that just *will* happen... that's a given.

We can trim those ranges, though.  Who cares if we lose some RAM.

	-hpa


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