I think there is. After I posted that trace I began running through the code - since the only (relevant) place agent_send_response is called is in response process_mad(), that is a distinct possibility. I've forwarded the information to the qib driver team.
If that's true, it would actually be good news - I posted the trace because was concerned that this could affect all fabrics. -----Original Message----- From: Hefty, Sean [mailto:[email protected]] Sent: Thursday, February 09, 2012 2:57 AM To: Mike Heinz; [email protected] Cc: Todd Rimmer Subject: RE: Possibly serious bug in ib_mad: processing packets from ibping can consume 100% of CPU and may leave user processes locked in umad_recv > Subject: Possibly serious bug in ib_mad: processing packets from > ibping can consume 100% of CPU and may leave user processes locked in > umad_recv Is there a chance that the low level driver is asking to send the MAD to itself over and over again? This message and any attached documents contain information from QLogic Corporation or its wholly-owned subsidiaries that may be confidential. If you are not the intended recipient, you may not read, copy, distribute, or use this information. If you have received this transmission in error, please notify the sender immediately by reply e-mail and then delete this message. -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
