[OpenAFS] suggestion for linux kernel modules

[Tim Spriggs]

Hi Joe,

  I just thought I would point out the uname is a standard utility and
works almost everywhere. On the other hand, my kernel doesn't provide a
/proc/ksyms (2.6.12.5 vanilla kernel)

  This may be a good idea but the implementation needs some modification
to be more general. This is probably why uname was used in the first
place.

-Tim

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On Wed, 2 Nov 2005, Joe Buehler wrote:

> We have a half-dozen different kernel versions here.  After running
> into some problems with kernels named the same but requiring different
> AFS modules (I think it was 586 vs 686 or similar), I started naming
> the modules based on the content of /proc/ksyms on the build machine.
>
> Here is what I use to compute a checksum of the kernel symbols:
>
>     awk 'NF==2' /proc/ksyms | md5sum | awk '{print $1}'
>
> The NF==2 strips out the symbols associated with loaded modules,
> leaving only the symbols associated with the kernel itself.
>
> To avoid changing the afs startup script, I hard-link at install time
> from the built module name to the name that the script expects,
> based on the same /proc/ksyms computation on the target machine.
>
> Including all the kernel symbols in the checksum is obviously overkill,
> but my point is I suppose that the current 1.4 scheme of using uname
> output for selecting a module is flawed and the module name should
> really be based on more detailed kernel information.
> --
> Joe Buehler
>
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