[openib-general] Re: OpenIB gen2 support ibv_create_cq

[Dhabaleswar Panda]

Matt, 

> The latest mvapich-gen2 does not compile with the latest OpenIB gen2
> code base.  The number of function arguments to ibv_create_cq has
> changed from 3 to 5.  This looks like a simple fix, but you may need to
> support both the old and new API for ibv_create_cq.  The current OpenIB
> gen2 backport to 2.6.9 (for RedHat) uses the older API.  

The patch has been included in the latest MVAPICH-Gen2 version checked
into the SVN a few hours ago. MVAPICH-Gen2 now compiles against the
latest Gen2 stack. If an older Gen2 stack is being used against the
latest MVAPICH-Gen2, we have added a new flag (-DGEN2_OLD_CQ_VERB) for
the code to be compiled with. More information on this has been added
to mvapich.user_guide.pdf (Version 1.1).

Hope this helps. 

Thanks, 

DK

> Woody, are there plans to update the 2.6.9 backports to svn version 3632
> or more recent to fix this?
> 
> 
> 
> 
> mvapich-gen2-1.0-102/mpid/ch_gen2/viainit.c ~line 118
> 
> static void create_cq(void)
> {
>     ibv_dev.cq_hndl = ibv_create_cq(ibv_dev.context,
>         viadev_cq_size, NULL);
> 
>     if(!ibv_dev.cq_hndl) {
>         error_abort_all(GEN_EXIT_ERR, "Error creating CQ\n");
>     }
> }
> 
> 
> 
> OpenIB verbs.h
> 
> extern struct ibv_cq *ibv_create_cq(struct ibv_context *context, int
> cqe,
>                                     void *cq_context,
>                                     struct ibv_comp_channel *channel,
>                                     int comp_vector);
> 
> 
>  Thanks,
> 
> 	- Matt
> 
>