[openib-general] Re: user-mode verbs on Itanium

[Grant Grundler]

On Fri, Apr 29, 2005 at 09:36:43AM -0700, Roland Dreier wrote:
>     Grant> Users of other distro's I think are going to be just as
>     Grant> confused.  Can the "no driver for uverbs0" error message
>     Grant> indicate the *userspace* driver is missing?  And indicate
>     Grant> where it's looking?
> 
> I just updated the code so the error messages are:
> 
>     libibverbs: Fatal: couldn't open sysfs class 'infiniband_verbs'.
> 
>     libibverbs: Warning: no userspace device-specific driver found for uverbs0
>             driver search path: /usr/lib/infiniband:/usr/local/lib/infiniband

Much nicer. Thanks!

>     Grant> But it's still not working: yprf3:~#
>     Grant> OPENIB_DRIVER_PATH=/usr/lib/infiniband/ ibv_pingpong
>     Grant> Couldn't get context for mthca0
> 
> Does the kernel driver match the userspace code -- ie are they both
> the latest subversion?

hrm...I'm using r2229 for userspace...and looks like r2225
for kernel. Let me sync up and report back again.

> I haven't started being anal about bumping the
> ABI version when changing the interface, so it's possible to get out
> of sync with this development code.

That's fine until this openib.org code gets into kernel.org.
For developement you can break it as much as you need to.

However, it's painful for distro's every time some ABI in
kernel.org breaks....they won't throw rotten tomatoes at you at
OLS or LWE 2006 if you don't break the ABI more than once a year.
:^)

thanks,
grant