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ib_srpt, README: Document how to detect excessive packet loss

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@5185 d57e44dd-8a1f-0410-8b47-8ef2f437770f
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Bart Van Assche
2014-01-07 14:13:49 +00:00
parent 922a8f8178
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srpt/README
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@@ -386,6 +386,17 @@ Performance Notes - Both Sides
Frequently Asked Questions
--------------------------
Q: Every now and then "SRP abort called" and "SRP reset_device called"
messages are logged at the initiator side. Around the same time I see the
following message in the target log: "ib_srpt: ***ERROR***: Command ...: IB
completion for idx ... has not been received in time (SRPT command state
...)". What is the meaning of these messages mean and how can I fix this ?
A: This means that a timeout occurred while a HCA was waiting for an
acknowledge message. Check the IB network for bad IB cables, bad HCA's
and/or bad switch ports. Also make sure that the HCA firmware is up to
date.
Q: Loading the kernel module ib_srpt triggers a kernel panic with a call trace
like the one below. What is the cause of this and how can this be solved ?