Bug 1016724

Summary: infiniband - performance regression fixes
Product: Red Hat Enterprise MRG Reporter: Clark Williams <williams>
Component: realtime-kernelAssignee: Red Hat Real Time Maintenance <rt-maint>
Status: CLOSED WONTFIX QA Contact: MRG Quality Engineering <mrgqe-bugs>
Severity: high Docs Contact:
Priority: unspecified    
Version: DevelopmentCC: bhu, jkacur, lgoncalv
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Target Release: ---   
Hardware: x86_64   
OS: All   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2015-04-01 21:24:53 UTC Type: Bug
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Flags
IB/cma - use cached gids
none
IB/cma - check for gid on listening device dirst
none
IB/cache - don't fill the cache with junk none

Description Clark Williams 2013-10-08 15:05:14 UTC 
Description of problem:

https://bugzilla.redhat.com/show_bug.cgi?id=920306

Customers discovered performance regression using Mellanox h/w and IBM Websphere Low Latency Messageing (WLLM). 

Apply series of three patches to MRG Realtime kernels for this problem.
Comment 1 Clark Williams 2013-10-08 15:07:34 UTC 
Created attachment 809352 [details]
IB/cma - use cached gids
Comment 2 Clark Williams 2013-10-08 15:08:24 UTC 
Created attachment 809353 [details]
IB/cma - check for gid on listening device dirst
Comment 3 Clark Williams 2013-10-08 15:09:12 UTC 
Created attachment 809354 [details]
IB/cache - don't fill the cache with junk
Comment 5 Clark Williams 2015-04-01 21:24:53 UTC 
Picked up IB performance updates with later refresh of the tree.