RDMA/cxgb4: DB Drop Recovery for RDMA and LLD queues
Add module option db_fc_threshold which is the count of active QPs that trigger automatic db flow control mode. Automatically transition to/from flow control mode when the active qp count crosses db_fc_theshold. Add more db debugfs stats On DB DROP event from the LLD, recover all the iwarp queues. Signed-off-by: NVipul Pandya <vipul@chelsio.com> Signed-off-by: NSteve Wise <swise@opengridcomputing.com> Signed-off-by: NRoland Dreier <roland@purestorage.com>
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