I think the CM ends up needing its own set of workqueues so that it can queue MAD processing along with "time wait" events etc. Also we don't want the CM to block general MAD processing while it waits for things like QP modify.
I thought about this approach, but wasn't sure about taking a context switch. I guess with QP redirection, this wouldn't be an issue though.
idle threads have pretty minimal impact beyond the memory they use. However on say a 512 CPU box with 6 HCAs, we would create 6000+ kernel threads, which seems pretty excessive.
Wouldn't it still just be one per port, or 12 total?
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