Re: [Scst-devel] srpt modprobe failure

[Bart V. A. <bar...@gm...>]

On Sat, Oct 31, 2009 at 8:18 PM, Gennadiy Nerubayev <pa...@gm...>wrote:

> On Sat, Oct 31, 2009 at 8:08 AM, Bart Van Assche <bar...@gm...
> > wrote:
>
>> On Tue, Oct 27, 2009 at 2:42 PM, Gennadiy Nerubayev <pa...@gm...>wrote:
>>
>>> On Tue, Oct 27, 2009 at 2:07 AM, Bart Van Assche <
>>> bar...@gm...> wrote:
>>>
>>>> On Tue, Oct 27, 2009 at 2:55 AM, Gennadiy Nerubayev <pa...@gm...>wrote:
>>>>
>>>>> Has anyone tried yet to get ib_srpt working under 2.6.30.x (.9 in my
>>>>> case) and 1.5 OFED? It compiles fine after the prerequisite addition of
>>>>> PRE_CFLAGS, but on modprobe I get a GPF (see attached).
>>>>>
>>>>
>>>>  SRPT works fine with the 2.6.30.x and 2.6.31.x kernels without OFED
>>>> 1.5. OFED 1.5 has not yet been released. Have you been testing OFED 1.5
>>>> alpha3, alpha4, beta1 or rc1 ?
>>>>
>>>
>>> I've been testing with rc1 and up; currently on the most recent daily as
>>> of yesterday. I need to use OFED instead of the in-kernel bits because I
>>> need the SDP functionality in OFED, amongst a few other things :(
>>>
>>
>> Hello Gennadiy,
>>
>> I have updated README.ofed, the Makefile and the patches directory inside
>> the srpt directory. Can you please verify whether SCST-SRPT does now work
>> with OFED 1.5 ?
>>
>
> Hi Bart,
>
> Module inserts with no problems and ibsrpdm shows the targets, so it looks
> good :)
>

Thanks for the feedback. The cause of the crash was that the Linux kernel
include path and the OFED 1.5 include path were specified in the wrong
order. As a result, the function ib_dma_map_single(), invoked from
srpt_add_one(), was reading ib_device::dma_ops from the wrong offset (the
struct ib_device declared in the OFED 1.5 header include/rdma/ib_verbs.h
differs from the struct ib_device declared in the 2.6.30 header
include/rdma/ib_verbs.h).

Bart.