kexec kernel with embedded initrd?

kexec kernel with embedded initrd?

[Sven Anders]

Hello!

Sorry to bother you, just a short question, because I didn't find anything
in the documentation or mailing list and I want to know if it should work
before I try to find the error.

I want to boot a kernel (bzImage) with an embedded initrd (CPIO archive using
the CONFIG_INITRAMFS_SOURCE option).

Can I simply load the kernel with kexec or do I have to extract the initrd
first and load them using the --initrd option?

If I have to extract them first, is there a tool for this?

Regards
 Sven

Mit freundlichen Grüßen
 Sven Anders

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 Sven Anders <anders@anduras.de>                 () Ascii Ribbon Campaign
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 ANDURAS service solutions AG
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Rechtsform: Aktiengesellschaft - Sitz: Passau - Amtsgericht Passau HRB 6032
Mitglieder des Vorstands: Sven Anders, Marcus Junker
Vorsitzender des Aufsichtsrats: Mark Peters


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Re: kexec kernel with embedded initrd?

[Geoff Levand]

Sven Anders wrote:
> I want to boot a kernel (bzImage) with an embedded initrd (CPIO archive using
> the CONFIG_INITRAMFS_SOURCE option).
> 
> Can I simply load the kernel with kexec or do I have to extract the initrd
> first and load them using the --initrd option?
> 
> If I have to extract them first, is there a tool for this?

You should be able to just load the bzImage.  The kernel image should know
how to then use the initramfs.  I know it works for powepc64 at least.

-Geoff 


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Re: kexec kernel with embedded initrd?

[Sven Anders]

Geoff Levand schrieb:
> Sven Anders wrote:
>> I want to boot a kernel (bzImage) with an embedded initrd (CPIO archive using
>> the CONFIG_INITRAMFS_SOURCE option).
>>
>> Can I simply load the kernel with kexec or do I have to extract the initrd
>> first and load them using the --initrd option?
>>
>> If I have to extract them first, is there a tool for this?
> 
> You should be able to just load the bzImage.  The kernel image should know
> how to then use the initramfs.  I know it works for powepc64 at least.

Hmm?!

If I load the same image directly (in kvm) in works. If I use kexec, it gives
me a kernel panic "Unable to mount root fs on unknown-block(3,0).
Any special option needed?
Maybe I'm doing something wrong, I will double check (again)...
(I'm using bzImage on i386).

Regards
 Sven

-- 
 Sven Anders <anders@anduras.de>                 () Ascii Ribbon Campaign
                                                 /\ Support plain text e-mail
 ANDURAS service solutions AG
 Innstraße 71 - 94036 Passau - Germany
 Web: www.anduras.de - Tel: +49 (0)851-4 90 50-0 - Fax: +49 (0)851-4 90 50-55

Rechtsform: Aktiengesellschaft - Sitz: Passau - Amtsgericht Passau HRB 6032
Mitglieder des Vorstands: Sven Anders, Marcus Junker
Vorsitzender des Aufsichtsrats: Mark Peters


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