[Pvfs2-users] unable to insert kernel module pvfs2.ko

[Tommy Butler]

I installed the latest kernel package from Debian (compiled with gcc 4.1),
the corresponding source.  I prepared the kernel source build tree as I
would normally do.

I got to the same point and experienced the same failure again, this time
with a slightly different error message from dmesg.  I must admit, I'm
almost ready to abandon this venture.  It's proving to be more of a hassle
than I can justify for hours billed.  It's not looking good.

Maybe some insight on this anyone, before I scrap it all?

during `make kmod_install`:
root at node2:/usr/src/pvfs2# make kmod_install

  WARNING: Symbol version dump /usr/src/linux-source-2.6.18/Module.symvers
           is missing; modules will have no dependencies and modversions.

after `insmod pvfs2.ko`:

root at node2:/usr/src/pvfs2/src/kernel/linux-2.6# uname -a
Linux node2 2.6.18-4-486 #1 Wed May 9 22:23:40 UTC 2007 i686 GNU/Linux
root at node2:/usr/src/pvfs2/src/kernel/linux-2.6# insmod pvfs2.ko
insmod: error inserting 'pvfs2.ko': -1 Invalid module format
root at node2:/usr/src/pvfs2/src/kernel/linux-2.6# dmesg|tail -n1
pvfs2: version magic '2.6.18 mod_unload 486 gcc-4.1' should be
'2.6.18-4-486mod_unload 486 REGPARM
gcc-4.1'

...I'll keep plugging away at it.  Again, I thank in advance all who provide
your assistance.

Many thanks,

-- 
Tommy Butler


On 5/30/07, Robert Latham <robl at mcs.anl.gov> wrote:
>
> On Wed, May 30, 2007 at 09:34:45PM -0500, Tommy Butler wrote:
> > !@#$ dangit.  Well I do so very much appreciate your rapid
> response.  I'll
> > work on sorting out the differences between gcc and my kernel.  PVFS is
> a
> > must have for this cluster.
>
> Hi Tommy
>
> Here's one thing we've done on our debian testing machines when the
> compiler got upgraded before the kernel.   It's kind of gross, but
> works.
>
> Go ahead and install the older gcc-4.0 package.  The gcc symlink
> /usr/bin/gcc will still point to the "default" gcc version, and is the
> gcc the kernel build system will try to use.  You may have some
> specific reasons why you can't install gcc-4.0 but there's a pretty
> good chance you'll be able to install multiple gcc packages without
> problem.
>
> /usr/bin/gcc probably points to /usr/bin/gcc-4.1 on your box.  Go
> ahead and temporarily make that link point to /usr/bin/gcc-4.0 while
> you make the pvfs2.ko module.  Probably would be a good idea to reset
> the link after you've built pvfs2.ko
>
> The "debian way" to fix this might be to rebuild the debian kernel
> package.   Not sure if the compiler is an explicit build-dep though.
>
> Either of those approaches work for you?
> ==rob
>
> --
> Rob Latham
> Mathematics and Computer Science Division    A215 0178 EA2D B059 8CDF
> Argonne National Lab, IL USA                 B29D F333 664A 4280 315B
>
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