linux-kernel - Re: [Fastboot] Kexec with latest kernel fail

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Date:	Thu, 9 Nov 2006 23:30:22 -0800
From:	yhlu <yinghailu@...il.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Horms <horms@...ge.net.au>,
	"Fastboot mailing list" <fastboot@...ts.osdl.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [Fastboot] Kexec with latest kernel fail

I found the cause before your mail.

the /proc/iomem doesn't show RAM above 1M.

I have increased linuxbios table at high 0xf0000-0xf0400 to
0xf0000-0x100000. the RAM above 1M show up.

I think root cause in the latest kernel 2.6.19, e820 align increase to 0xffff.
and when it check 0xf0000-0xf0400, will make 0xf0000-0x100000
reserved, and then when it  check 0xf0400-4G, it will fail to reserved
System RAM above 1M.

I will check arch/x86_64/kernel/e820.c about
void __init e820_reserve_resources(void)
tommorrow.

YH
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