[openib-general] Problem in patching 2.6.9 kernel

[Liang Peng]

Thanks Jack. After applying the patch, seems that the problem doesn't 
occur anymore. However, after I reboot I still can't find the modules:

[root at thebe]# modprobe ib_mthca
FATAL: Module ib_mthca not found.
FATAL: Error running install command for ib_mthca

Could it be that my new kernel images is not taking effect? What needs 
to be done with Grub after recompiling the kernel? Sorry for the 
newbie-like questions and thanks a lot.


Regards,
Liang Peng


Jack Morgenstein wrote On 11/09/05 15:56,:

>at URL 
>https://openib.org/svn/gen2/branches/backport/2.6.9/
>
>look at file core_3935_to_2_6_9.patch, and take the patch hunk for:
>	latest/drivers/infiniband/core/uverbs_main.c
>
>This hunk addresses the "get_sb_pseudo" issue.  The hunk should be OK at your SVN revision, too.
>Note that you may get a "symbol redefined" warning as a result of the patch -- ignore it.
>(the warning arises from kernel include files, which do not define the function as "static").
>
>The basic problem was that in kernel 2.6.9, this function was not exported to the kernel's symbol table.
>
>Jack
>
>On Wed, Nov 09, 2005 at 09:01:14AM +0200, Liang Peng wrote:
>  
>
>>Hi there,
>>
>>Got some problem in patch 2.6.9 kernel and someone please help me out. 
>>Thanks.
>>
>>The details are as follows:
>>
>>1) I wanted to try OpenIB on our AMD 64 Opteron machines, with 
>>Cisco/Topspin IB switch and Silverstorm HCA and cables with PCI-X slots.
>>
>>2) I installed RHEL4U2 with kernel 2.6.9-22ELsmp and am using gcc to 
>>compile.
>>
>>3) I downloaded the OpenIB packages from 
>>http://www.openib.org/downloads.html, which is openib-userspace-svn3279-2.x86_64.rpm <http://openib.org/downloads/openib-userspace-svn3279-2.x86_64.rpm>.
>>3.5) I am following OpenIB's installation guide at 
>>https://openib.org/tiki/tiki-index.php?page=Installation+Cheat+Sheet
>>
>>4) I got the patches from 
>>https://openib.org/svn/gen2/branches/backport-to-2.6.9/
>>
>>and got the *svn3279* patches because the OpenIB rpms that I downloaded 
>>is svn3279.
>>
>>5) I applied the patches Linux kernel without any problems (at least I 
>>can't see any problems here).
>>
>>6) I did "make menuconfig" and selected the corresponding infiniband support modules, 
>>saved configuration and exited.
>>
>>7) I tried to add udev rules, but found that the file /etc/udev/udev.rules doesn't 
>>exist (however the directory /etc/udev exists with rules.d/ and some other subdirectories). 
>>So I just created a new file /etc/udev/rules.d/90-ib.rules as the installation guide suggests. 
>>
>>8) The problems occurs when I tried to compile and load the modules:
>>
>>[root at thebe linux-2.6.9]# make modules
>>...
>>  CHK     include/linux/version.h
>>
>>make[1]: `arch/x86_64/kernel/asm-offsets.s' is up to date.
>>
>>  Building modules, stage 2.
>>
>>  MODPOST
>>
>>*** Warning: "get_sb_pseudo" [drivers/infiniband/core/ib_uverbs.ko] 
>>undefined!
>>
>>
>>[root at thebe linux-2.6.9]# make modules_install
>>
>>......
>>
>>if [ -r System.map ]; then /sbin/depmod -ae -F System.map  2.6.9; fi
>>
>>WARNING: /lib/modules/2.6.9/kernel/drivers/infiniband/core/ib_uverbs.ko 
>>needs unknown symbol get_sb_pseudo
>>
>>
>>So the modules cannot be installed and I can't load them with "modprobe"
>>and it says the module cannot be found.
>>
>>Can someone point out what I did wrongly? Any hints will be appreciated 
>>very much.
>>
>>
>>Regards,
>>Liang
>>
>>-- 
>>Large Scale Computing and Grid Computing
>>Asia Pacific Science & Technology Center
>>Sun Microsystems Inc. 
>>Homepage: http://apstc.sun.com.sg
>>Email: Liang.Peng at Sun.com
>>and 
>>Nanyang Technological University, Singapore
>>Email: MLPeng at ntu.edu.sg
>>
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>>
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>>    
>>
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-- 
Large Scale Computing and Grid Computing
Asia Pacific Science & Technology Center
Sun Microsystems Inc. 
Homepage: http://apstc.sun.com.sg
Email: Liang.Peng at Sun.com
and 
Nanyang Technological University, Singapore
Email: MLPeng at ntu.edu.sg