[openib-general] OFED 1.1 Build Issue

[Vladimir Sokolovsky]

The alternative way to resolve this issue is the following:
Save Modules.symvers file generated by OFED kernel modules compilation 
(drivers/infiniband/Modules.symvers).
It can be added to the kernel-ib-devel RPM in the next OFED release.
Then in order to compile external module copy this Modules.symvers to 
the directory where external module is build.

Regards,
Vladimir


Moni Shoua wrote:
> We managed to avoid rebuilding the kernel to solve this issue.
>
> Before building any IB dependant modules (out of OFED) it is required to
> update the Module.symvers.
> The new values for the symbol CRCs can be taken from the modules
> themselves ( nm IB_MODULE |grep __crc_)
> When Module.symvers is up-to-date, there should be no problem building
> and installing the IB dependant modules.
>
> The solution step-by-step
> 1. The procedure should run after installing the kerne-ib-devel RPM. It
> is possible to run it in %pre section of the spec file.
> 2. Foreach IB module (ko) which is listed in $(rpm -ql kernel-ib) - 
> 	2.1 take out the __crc_ sybbols 
> 	2.2 extract the symbol name and it's CRC value (simple parsing)
> 	2.3 add  it (or replace the existing) to Module.symvers (usually
> under /lib/modules/$(uname -r)/build/ or /lib/modules/$(uname
> -r)/source/ )
> 3. Save the diff of the current Module.symvers from the original (for
> future restore)
> 4. When kernel-ib-devel RPM is uninstalled use the patch from (3) to
> restore Module.symvers. This can be done in the %postun of the spec
> file)
>
> I'd be glad to get comments about this.
>
>
>
>
> -----Original Message-----
> From: openib-general-bounces at openib.org
> [mailto:openib-general-bounces at openib.org] On Behalf Of Tom Tucker
> Sent: Friday, October 27, 2006 5:30 PM
> To: openib-general
> Subject: [openib-general] OFED 1.1 Build Issue
>
>
> I've been testing some code against the OFED 1.1 release and noticed
> that if you build anything that depends on IB (RNFS in this case) into
> the kernel, that the OFED kit doesn't work correctly. This is because
> the dependent modules (ib_core, etc...) get sucked into the kernel
> automagically and will cause the subsequent modprobe of the OFED module
> to fail.
>
> I don't think you can fix this without rebuilding the kernel so it
> should probably be listed in the OFED_release_notes as a known issue.
> Providing a mechanism to rebuild the kernel as part of the OFED install
> would be great too, sorry if it's already there and I missed it.
>
> Tom
>
>
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