kexec documentation missing, bad links in kdump.txt

kexec documentation missing, bad links in kdump.txt

[Pavel Machek]

Hi!

Where can one get kexec documentation?

(In particular, we are trying to get it to boot on ARM board, and
wonder if something like CONFIG_RELOCATABLE_KERNEL is needed.)

Unfortunately, only pieces mentioning kexec are kdump pieces
(Documentation/kdump/kdump.txt), and links there, such as

http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/kexec-tools.tar.gz

http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/README.html

http://www.kernel.org/git/?p=linux/kernel/git/horms/kexec-tools.git

are no longer valid :-(.
								Pavel

Re: kexec documentation missing, bad links in kdump.txt

[Américo Wang]

On Thu, Nov 18, 2010 at 10:50:15AM +0100, Pavel Machek wrote:
>Hi!
>
>Where can one get kexec documentation?
>
>(In particular, we are trying to get it to boot on ARM board, and
>wonder if something like CONFIG_RELOCATABLE_KERNEL is needed.)
>


If you want to use the same kernel as the crash kernel, yes,
you have to support relocatable during boot on your arch.


>Unfortunately, only pieces mentioning kexec are kdump pieces
>(Documentation/kdump/kdump.txt), and links there, such as
>
>http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/kexec-tools.tar.gz
>
>http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/README.html
>
>http://www.kernel.org/git/?p=linux/kernel/git/horms/kexec-tools.git
>
>are no longer valid :-(.

Try:

 git://git.kernel.org/pub/scm/utils/kernel/kexec/kexec-tools.git

Re: kexec documentation missing, bad links in kdump.txt

[Vivek Goyal]

On Thu, Nov 18, 2010 at 10:50:15AM +0100, Pavel Machek wrote:
> Hi!
> 
> Where can one get kexec documentation?
> 
> (In particular, we are trying to get it to boot on ARM board, and
> wonder if something like CONFIG_RELOCATABLE_KERNEL is needed.)
> 

For kexec you will not need CONFIG_RELOCATABLE_KERNEL. But if you also
want to use kdump and use same bzImage as first kernel then you will
need relocatable kernel support.

For kdump I had done two presentations at OLS. You might find little
bit of kexec details too.

Kdump: Smarter, Easier, Trustier
http://www.kernel.org/doc/ols/2007/ols2007v1-pages-167-178.pdf

Kdump, a kexec based crash dumping mechanism.
http://lse.sourceforge.net/kdump/documentation/ols2oo5-kdump-paper.pdf

thanks
Vivek
 
> Unfortunately, only pieces mentioning kexec are kdump pieces
> (Documentation/kdump/kdump.txt), and links there, such as
> 
> http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/kexec-tools.tar.gz
> 
> http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/README.html
> 
> http://www.kernel.org/git/?p=linux/kernel/git/horms/kexec-tools.git
> 
> are no longer valid :-(.
> 								Pavel

Re: kexec documentation missing, bad links in kdump.txt

[Randy Dunlap]

On Thu, 18 Nov 2010 09:23:22 -0500 Vivek Goyal wrote:

> On Thu, Nov 18, 2010 at 10:50:15AM +0100, Pavel Machek wrote:
> > Hi!
> > 
> > Where can one get kexec documentation?
> > 
> > (In particular, we are trying to get it to boot on ARM board, and
> > wonder if something like CONFIG_RELOCATABLE_KERNEL is needed.)
> > 

Simon, Vivek --
can you get someone to update the Documentation/ files, please?


> For kexec you will not need CONFIG_RELOCATABLE_KERNEL. But if you also
> want to use kdump and use same bzImage as first kernel then you will
> need relocatable kernel support.
> 
> For kdump I had done two presentations at OLS. You might find little
> bit of kexec details too.
> 
> Kdump: Smarter, Easier, Trustier
> http://www.kernel.org/doc/ols/2007/ols2007v1-pages-167-178.pdf
> 
> Kdump, a kexec based crash dumping mechanism.
> http://lse.sourceforge.net/kdump/documentation/ols2oo5-kdump-paper.pdf
> 
> thanks
> Vivek
>  
> > Unfortunately, only pieces mentioning kexec are kdump pieces
> > (Documentation/kdump/kdump.txt), and links there, such as
> > 
> > http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/kexec-tools.tar.gz
> > 
> > http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/README.html
> > 
> > http://www.kernel.org/git/?p=linux/kernel/git/horms/kexec-tools.git
> > 
> > are no longer valid :-(.
> > 								Pavel
> --


---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***

Re: kexec documentation missing, bad links in kdump.txt

[Simon Horman]

On Thu, Nov 18, 2010 at 10:06:47AM -0800, Randy Dunlap wrote:
> On Thu, 18 Nov 2010 09:23:22 -0500 Vivek Goyal wrote:
> 
> > On Thu, Nov 18, 2010 at 10:50:15AM +0100, Pavel Machek wrote:
> > > Hi!
> > > 
> > > Where can one get kexec documentation?
> > > 
> > > (In particular, we are trying to get it to boot on ARM board, and
> > > wonder if something like CONFIG_RELOCATABLE_KERNEL is needed.)
> > > 
> 
> Simon, Vivek --
> can you get someone to update the Documentation/ files, please?

Sure.