Kernel modules

[Hans Petter Selasky]

On 3/18/19 2:56 PM, Jason Bacon wrote:
> On 3/18/19 7:55 AM, Hans Petter Selasky wrote:
>> On 3/18/19 1:32 PM, Jason Bacon wrote:
>>>
>>> Anyone using the kernel modules lately?
>>>
>>> After building per the instructions on the wiki 
>>> (https://wiki.freebsd.org/InfiniBand):
>>>
>>> <<<ROOT at unixdev.ceas>>> /home/bacon 1005 # kldload ibcore
>>> kldload: an error occurred while loading module ibcore. Please check 
>>> dmesg(8) for more details.
>>>
>>> dmesg:
>>>
>>> link_elf_obj: symbol if_index undefined
>>> linker_load_file: /boot/modules/ibcore.ko - unsupported file type
>>
>> Hi,
>>
>> You built the KMODs out of the kernel? Try adding 
>> DEBUG_FLAGS="-DVIMAGE=1" to your out of tree build.
>>
>> --HPS
> 
> I used the script for building kernel modules (which I wrote and posted 
> at https://wiki.freebsd.org/InfiniBand a few years ago, based on advice 
> from a Mellanox developer at the time).  This will show exactly what I did.
> 

Can you try:

make DEBUG_FLAGS="-DVIMAGE=1"

instead of

make

in the script. In FreeBSD-12 VIMAGE was turned on by default unlike 
FreeBSD-11.

--HPS

> Hoping there's a simple fix for this.
> 
> In theory, it should now be possible to enable IB support on a stock 
> FreeBSD system in a few minutes, since we should be able to use loadable 
> modules instead of doing a buildkernel, and IB support is now included 
> in the base, making buildworld unnecessary:
> 
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211761
> 
> This is a big step toward enabling the use of stock FreeBSD systems in HPC.
> 
> I had successfully used the IB stack before by loading the modules and 
> doing a buildworld.
> 
> Regards,
> 
>      JB
>