[openib-general] RDMA write with immediate
halr at voltaire.com
Thu Jun 23 05:56:42 PDT 2005
On Thu, 2005-06-23 at 08:47, Josh England wrote:
> 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 220.127.116.11 under RHEL3. Fresh rebuild/install of
> libibverbs, libmthca, and libibcm. Ports are ACTIVE and ipoib ping
> # 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
> # 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.
Are you sure this is 2685 ? As of 2658, I think uverbs now starts at
minor 192 rather than 128.
Fix order of cleanup in module unload. Move first minor from 128 to
> 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.
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