[Fastboot] kexec - 2.6.14 - loads BIOS again

Eric W. Biederman ebiederm at xmission.com
Thu Oct 1 22:03:08 EDT 2009

"Prabhakar K." <krishkar99 at yahoo.com> writes:

> From: Eric W. Biederman <ebiederm at xmission.com>
> Subject: Re: [Fastboot] kexec - 2.6.14 - loads BIOS again
> To: "Prabhakar K." <krishkar99 at yahoo.com>
> Cc: "Kexec Mailing List" <kexec at lists.infradead.org>,
> fastboot at lists.linux-foundation.org
> Date: Thursday, October 1, 2009, 6:29 AM
> "Prabhakar K." <krishkar99 at yahoo.com> 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.


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