The workqueue is currently single threaded per port which for a small number of
SDMA engines is ok.
For hfi1, the there are up to 16 SDMA engines that can be fed descriptors in
parallel.
Use alloc_workqueue with a workqueue limit of the number of sdma engines and
with WQ_CPU_INTENSIVE and WQ_HIGHPRI specified.
Then change send to use the new scheduler which no longer needs to get the
s_lock
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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