Bug 236836 - [RHEL5 RT][OPENIB]rdma capability not working with RT kernel.
[RHEL5 RT][OPENIB]rdma capability not working with RT kernel.
Product: Red Hat Enterprise MRG
Classification: Red Hat
Component: realtime-kernel (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Doug Ledford
Depends On:
  Show dependency treegraph
Reported: 2007-04-17 17:02 EDT by Gurhan Ozen
Modified: 2008-02-27 14:58 EST (History)
2 users (show)

See Also:
Fixed In Version: -35
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2007-10-02 10:52:56 EDT
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Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Gurhan Ozen 2007-04-17 17:02:24 EDT
Description of problem:
  rdma userspace programs can't be run on RT kernel due to kernel abi mismatch:

# ucmatose
librdmacm: kernel ABI version 4 doesn't match library version 2.
failed to create event channel

Version-Release number of selected component (if applicable):
# rpm -qa | grep rdma
# uname -a
Linux dell-pe1950-02.rhts.boston.redhat.com 2.6.20-19.el5rt #1 SMP PREEMPT Mon
Apr 16 12:14:21 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux

How reproducible:

Steps to Reproduce:
1. Boot into RT kernel with a system that has infiniband hardware and try to run
Actual results:

Expected results:

Additional info:
Comment 1 Doug Ledford 2007-07-10 16:53:03 EDT
This is resolved by using the openib-1.2-1.el5 packages.
Comment 2 Doug Ledford 2007-07-10 17:31:33 EDT
openib-1.2-1.el5 has been tagged into dist-5E-rt which means they'll get picked
up in the next rhel-rt compose.
Comment 3 Gurhan Ozen 2007-08-13 17:00:40 EDT
Verified with -35:
[root@dell-pe1950-02 ~]# ucmatose -b 
cmatose: starting server
initiating data transfers
completing sends
receiving data transfers
data transfers complete
cmatose: disconnecting
test complete
return status 0
[root@dell-pe1950-02 ~]# uname -a
Linux dell-pe1950-02.rhts.boston.redhat.com 2.6.21-35.el5rt #1 SMP PREEMPT RT
Thu Jul 26 11:59:02 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux

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