linux-kernel - RE: [PATH 0/1] Kexec jump - v2 - the first step to kexec based hibernation

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Message-ID: <9D7649D18729DE4BB2BD7B494F7FEDC2437517@pdsmsx415.ccr.corp.intel.com>
Date:	Mon, 6 Aug 2007 21:22:46 +0800
From:	"Huang, Ying" <ying.huang@...el.com>
To:	"Pavel Machek" <pavel@....cz>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	<nigel@...el.suspend2.net>, "Rafael J. Wysocki" <rjw@...k.pl>,
	"Jeremy Maitin-Shepard" <jbms@....edu>,
	"Alan Stern" <stern@...land.harvard.edu>,
	"Andrew Morton" <akpm@...ux-foundation.org>, <david@...g.hm>,
	<linux-kernel@...r.kernel.org>,
	<linux-pm@...ts.linux-foundation.org>,
	"Kexec Mailing List" <kexec@...ts.infradead.org>
Subject: RE: [PATH 0/1] Kexec jump - v2 - the first step to kexec based hibernation

>-----Original Message-----
>From: Pavel Machek [mailto:pavel@....cz]
>> > Did the trick, I got the kernel to load, and it even attempted
>> > exec... but I got doublefault (or what is it?)
>> >
>> > Int 6: ... EIP: c4739906. Address is in reserve_bootmem_core.
>> >
>> > Do I have to disable ACPI completely? I tried with acpi=off,
>> > nosmp... but problem does not seem device related.
>>
>> It seems that the problem has nothing to do with device or ACPI. Can
you
>> do a normal kexec? That is:
>>
>> kexec -l <...>
>> kexec -e
>>
>> or
>>
>> kexec -p <...>
>> ALT-SysRq-c to trigger a crash dump.
>
>...that was indeed a problem. I can do successful kexec, as long as I
>load bzImage (and not vmlinux). (Both kernels 2.6.22 and
>2.6.23-rc2-git). Problem is, I can only load bzImage using -l, attempt
>to load bzImage using -p results in
>
>"Could not find a free area of memory of 9000 bytes"
>locate_hole failed
>
>. Any ideas?

The Kexec-tools 1.101 can not deal with bzImage with "-p" properly. So
vmlinux must be used with "-p". And the tricks previous mentioned must
be used for normal kexec -p too. The example command line is as follow:

kexec -p --args-linux vmlinux --append="root=/dev/<xxx> ..."

Best Regards,
Huang Ying
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