Intermitted "Failed to obtain HW semaphore, aborting" error

[Bharath Ramesh]

Intermittently a couple of nodes in our cluster throw the error "Failed to obtain HW semaphore, aborting" on boot. When this error occurs we are unable to use IB on those nodes, unloading and reloading the module doesnt help. I was wondering what could be causing this error, google only brings up the source code and no discussion about this error. We are using OFED-1.5.4, any help in debugging and resolving this issue is greatly appreciated.

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Bharath

note: I am not subscribed to the list so would appreciate if I am copied in the replies.

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