Re: [makedumpfile] config file -- OSRELEASE

From: Bernhard Walle <bwalle@suse.de>
To: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
Cc: jlan@sgi.com, kexec@lists.infradead.org
Subject: Re: [makedumpfile] config file -- OSRELEASE
Date: Thu, 31 May 2007 10:57:57 +0200	[thread overview]
Message-ID: <20070531085757.GA2585@suse.de> (raw)
In-Reply-To: <20070530201328oomichi@mail.jp.nec.com>

Hello,

* Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp> [2007-05-30 13:13]:
> 2007/05/29 21:30:58 +0200, Bernhard Walle <bwalle@suse.de> wrote:
> >is there any reason why the kernel version saved in the configuration
> >file is the version of the running kernel and not the version for
> >which the config file is for?
> 
> The reason is that makedumpfile gets a running kernel's page_size as
> a 1st-kernel's page_size. If they are different, makedumpfile cannot
> analyze /proc/vmcore and it fails. So I think a configuration file
> should be created while 1st-kernel is running.

I also didn't find a possibility to get the page size from a kernel
image without running the executable.

> >It's a big problem because my plan was to ship the configuration files
> >with the kernel RPMs in SLES. However, we don't build the kernels on
> >systems which run the kernel that is just built -- so that's not
> >possible.
> 
> It is a good idea to ship the configuration files with the kernel RPMs. 
> I think you can do it with current implementation, because you need
> only one configuration file for one kernel image.
> 
> I think you can ship configuration files as follows:
> 
> 1. Build a kernel file and a debuginfo file.
> 2. Boot the system with the above kernel file.
> 3. Generate a configration file from a debuginfo file.
> 4. Ship the configration file with the kernel RPM.
> 
> Any problem to follow the method above ?

No, that's not possible because it would change our whole build
process. However, I just replace the OSRELEASE now after generating
the config file with the kernel that's built and change the page size
according to the .config on IA64. That works for now. I know it's not
the best solution, but the only practicable for now.

Thanks,
   Bernhard
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