[ewg] trouble getting NFS/RDMA modules to load

[Jeff Becker]

Hi John. I'm the NFS/RDMA maintainer. You are correct that 2.6.26 has
some issues that I am working on. Would it be possible for you to use a
2.6.27 kernel? Thanks.

Jeff Becker

John Fitzgerald wrote:
> I've been trying to get NFS/RDMA setup and working on a Linux client,
> but have been hitting some roadblocks.
> I'm using a 2.6.26 kernel, and have gotten NFS on setup as a client
> working over TCP/Ethernet, and working TCP/IB, but can't get RDMA
> modules to load.
>
> The errors are the same as listed in an old posting (shown below)
> except with "svcrdma" the module not loading:
> svcrdma: disagrees about version of symbol ib_create_cq
> svcrdma: Unknown symbol ib_create_cq
> ...
>
> I get the same errors if I try to load xprtrdma.  I searched around
> for a solution to the problem below but struck out.  The posting below
> is old (OFED 1.2), I'm using OFED 1.4, and see the same thing with rc1
> and rc5.
>
> Any advice?
>
> Thanks,
> John.
> john.fitzgerald at sun.com
>
>
> Old posting shown here:
>
> [openfabrics-ewg] bug 355 - problems building modules that depend on
> the ofed 1.2 modules
> Steve Wise swise at opengridcomputing.com
> Thu Feb 15 09:12:06 PST 2007
>
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>
> All,
>
> I've run into the following problem.  Bug 335 opened to track this...
>
> I install the alpha1 ofed 1.2 rpms on a RHEL5b2 system with its
> 2.6.18-1.2747.el5 kernel.
>
> Then I build a module outside of the kernel that uses the IB verbs and
> RDMA CM kernel interface.  (krping).  This module builds and loads ok on
> a stock 2.6.20 system with ofed1.2 installed, but it fails to load on
> the rhel5b2 system with a version symbol problem.  Here is a snipit of
> the errors:
>
> rdma_krping: disagrees about version of symbol ib_create_cq
> rdma_krping: Unknown symbol ib_create_cq
> rdma_krping: disagrees about version of symbol rdma_resolve_addr
> rdma_krping: Unknown symbol rdma_resolve_addr
> rdma_krping: disagrees about version of symbol ib_dereg_mr
> rdma_krping: Unknown symbol ib_dereg_mr
>
> I'm wondering if maybe the ofed modules are _not_ being build with src
> versioning even if the kernel has it turned on?
>
> We see similar problems with NFS-RDMA trying to use OFED 1.2 modules.
> And the NFS-RDMA works with OFED 1.1 modules, so I _think_ something is
> whacked with the OFED 1.2 build process.
>
>
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