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Thomas Jacob 02-26-2012 04:13 PM

CentOS plus kernel-devel x86_64 with incomplete Module.symvers?
 
Hello list,

While working on building a driver update module RPM for CentOS 6 x86_64
I noticed that that the Module.symvers file included in the non-debug kernel-devels
for the latest CentOS-Plus x86_64 kernels seems to be much shorter than that
for the debug version and also than both version for the i686 architecture

$ awk '{print $4;}' /usr/src/kernels/2.6.32-220.4.2.el6.i686/Module.symvers | sort | uniq -c
6124 EXPORT_SYMBOL
3706 EXPORT_SYMBOL_GPL

$ awk '{print $4;}' /usr/src/kernels/2.6.32-220.4.2.el6.i686.debug/Module.symvers | sort | uniq -c
6177 EXPORT_SYMBOL
3734 EXPORT_SYMBOL_GPL

$ awk '{print $4;}' /usr/src/kernels/2.6.32-220.4.2.el6.x86_64/Module.symvers | sort | uniq -c
*2716 EXPORT_SYMBOL*
*1957 EXPORT_SYMBOL_GPL*

$ awk '{print $4;}' /usr/src/kernels/2.6.32-220.4.2.el6.x86_64.debug/Module.symvers | sort | uniq -c
6147 EXPORT_SYMBOL
3916 EXPORT_SYMBOL_GPL

This prevents the find find-requires.ksyms script (part of the %kernel_module_package utility set)
from creating KABI dependencies properly on x86_64, for kernel module packages build according RHEL driver
update program (i.e. kmod-* package), in the sense that they are build without any KABI-requires
in the resulting kmod-RPM.

The standard CentOS kernel-devel (presumably RHEL upstream?) however, contains
similar numbers of symbols in Module.symvers also in the x86_64 architecture:

$ awk '{print $4;}' /usr/src/kernels/2.6.32-220.el6.i686/Module.symvers | sort | uniq -c
6119 EXPORT_SYMBOL
3706 EXPORT_SYMBOL_GPL

$ awk '{print $4;}' /usr/src/kernels/2.6.32-220.el6.x86_64/Module.symvers | sort | uniq -c
6089 EXPORT_SYMBOL
3888 EXPORT_SYMBOL_GPL

Could anyone confirm whether or not this is by design? Or should I report this
as a bug?

TIA & Regards,
Thomas
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Akemi Yagi 02-26-2012 04:28 PM

CentOS plus kernel-devel x86_64 with incomplete Module.symvers?
 
On Sun, Feb 26, 2012 at 9:13 AM, Thomas Jacob <jacob@internet24.de> wrote:
> Hello list,
>
> While working on building a driver update module RPM for CentOS 6 x86_64
> I noticed that that the Module.symvers file included in the non-debug kernel-devels
> for the latest CentOS-Plus x86_64 kernels seems to be much shorter than that
> for the debug version and also than both version for the i686 architecture
>
> $ awk '{print $4;}' /usr/src/kernels/2.6.32-220.4.2.el6.i686/Module.symvers | sort | uniq -c
> * 6124 EXPORT_SYMBOL
> * 3706 EXPORT_SYMBOL_GPL
>
> $ awk '{print $4;}' /usr/src/kernels/2.6.32-220.4.2.el6.i686.debug/Module.symvers | sort | uniq -c
> * 6177 EXPORT_SYMBOL
> * 3734 EXPORT_SYMBOL_GPL
>
> $ awk '{print $4;}' /usr/src/kernels/2.6.32-220.4.2.el6.x86_64/Module.symvers | sort | uniq -c
> * *2716 EXPORT_SYMBOL*
> * *1957 EXPORT_SYMBOL_GPL*
>
> $ awk '{print $4;}' /usr/src/kernels/2.6.32-220.4.2.el6.x86_64.debug/Module.symvers | sort | uniq -c
> * 6147 EXPORT_SYMBOL
> * 3916 EXPORT_SYMBOL_GPL
>
> This prevents the find *find-requires.ksyms script (part of the %kernel_module_package utility set)
> from creating KABI dependencies properly on x86_64, for kernel module packages build according RHEL driver
> update program (i.e. kmod-* package), in the sense that they are build without any KABI-requires
> in the resulting kmod-RPM.
>
> The standard CentOS kernel-devel (presumably RHEL upstream?) however, contains
> similar numbers of symbols in Module.symvers also in the x86_64 architecture:
>
> $ awk '{print $4;}' /usr/src/kernels/2.6.32-220.el6.i686/Module.symvers | sort | uniq -c
> * 6119 EXPORT_SYMBOL
> * 3706 EXPORT_SYMBOL_GPL
>
> $ awk '{print $4;}' /usr/src/kernels/2.6.32-220.el6.x86_64/Module.symvers | sort | uniq -c
> * 6089 EXPORT_SYMBOL
> * 3888 EXPORT_SYMBOL_GPL
>
> Could anyone confirm whether or not this is by design? Or should I report this
> as a bug?

By all means, please file a bug report. This is certainly not by design. :-(

Akemi
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