[openib-general] RDMA write with immediate

[Josh England]

Alright, I'm probably being retarded, but just in case:
uverbs doesn't seem to work anymore.  Simple pingpong uverbs test gives:

Couldn't get context for mthca0

This is with rev 2685 on 2.6.12.1 under RHEL3.  Fresh rebuild/install of
libibverbs, libmthca, and libibcm.  Ports are ACTIVE and ipoib ping
works.

# lsmod
ib_ucm                 15448  0
ib_cm                  33904  1 ib_ucm
ib_at                  13704  0
ib_uverbs              24088  0
ib_ipoib               38920  0
ib_sa                  11660  2 ib_at,ib_ipoib
ib_mthca               90768  0
ib_mad                 38056  3 ib_cm,ib_sa,ib_mthca
ib_core                41088  6
ib_cm,ib_uverbs,ib_ipoib,ib_sa,ib_mthca,ib_mad

# ll /dev/infiniband
crw-r--r--    1 root     root     231, 255 Jun 23 05:31 ucm
crw-rw-rw-    1 root     root     231, 128 Jun 23 05:31 uverbs0
crw-rw-rw-    1 root     root     231, 129 Jun 23 05:31 uverbs1


Did I miss something?  I think this is the same environment that was
working before.

-JE

On Wed, 2005-06-22 at 19:02 -0700, Roland Dreier wrote:
>     Josh> I'm trying to figure out how to do an RDMA write with
>     Josh> immediate data.  I've got a regular RDMA write working and
>     Josh> tried changing wr.opcode from IBV_WR_RDMA_WRITE to
>     Josh> IBV_WR_RDMA_WRITE_WITH_IMM and stuffing a value in
>     Josh> wr.imm_data to no avail.  The send fails.
> 
> This should work, and in fact I tested it a while ago, although it may
> have broken in the meantime.
> 
> When you say that your send fails, what do you mean?  Does
> ibv_post_send() return immediately with an error?  Or do you get a
> completion for your send request with a failed status?  If so, what is
> the status?  Or does the send just never complete and/or never show up
> on the remote system?
> 
>  - R.
> 
>