Re: kexec - 2.6.14 - loads BIOS again

[ebiederm@xxxxxxxxxxxx (Eric W. Biederman)]

"Prabhakar K." <krishkar99@xxxxxxxxx> writes:

> From: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
> Subject: Re:  kexec - 2.6.14 - loads BIOS again
> To: "Prabhakar K." <krishkar99@xxxxxxxxx>
> Cc: "Kexec Mailing List" <kexec@xxxxxxxxxxxxxxxxxxx>,
> fastboot@xxxxxxxxxxxxxxxxxxxxxxxxxx
> Date: Thursday, October 1, 2009, 6:29 AM
>
> "Prabhakar K." <krishkar99@xxxxxxxxx> writes:
>
>> Sending again as it is not posted yet !!
>>
>> I have back ported to multiple versions of different kexec-tools. Also I
>> disabled watchdogs so that the first kernel reboot is not kicked in.
>> Now, with all those kexec-tools I see that it hangs
>> after post_verification_setup_arch( ).
>> And I had to hard reboot the router box.
>>
>> Is there a specific kexec tools that is known to work with 2.6.14 ? Or any
>> additional changes needed ?
>
> Almost certainly if you are getting as far as kexec-tools you are dying
> someplace early in your target kernel.
>
>>>> OK. What piece of code can cause in the target kernel to die ?
> Can I take any working bzImage or vmlinux of a linux kernel(for that matter any
> linux kernel) and load that as my target kernel ? or does this has any
> restriction ?

Short of bugs in /sbin/kexec it is unrestricted.

Eric
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