[openib-general] OFED 1.1 Build Issue

[Moni Shoua]

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


_______________________________________________
openib-general mailing list
openib-general at openib.org
http://openib.org/mailman/listinfo/openib-general

To unsubscribe, please visit
http://openib.org/mailman/listinfo/openib-general