tree cdca03a8d34e6c190b021a54c98925eaf1330c7c
parent 96fc248a4c6fe1e5ffac4903b39d2dd5cbe2dc9a
author Bart Van Assche <bvanassche@acm.org> 1372424262 +0200
committer Roland Dreier <roland@purestorage.com> 1372700455 -0700

IB/srp: Make HCA completion vector configurable

Several InfiniBand HCAs allow configuring the completion vector per
CQ.  This allows spreading the workload created by IB completion
interrupts over multiple MSI-X vectors and hence over multiple CPU
cores.  In other words, configuring the completion vector properly not
only allows reducing latency on an initiator connected to multiple
SRP targets but also allows improving throughput.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Roland Dreier <roland@purestorage.com>