tree d936169799d99d924f92b385d1af31d62d083b90
parent 1e465fd4ff475cc29c866ee75496c941b3908e69
author Chuck Lever <chuck.lever@oracle.com> 1445722030 -0400
committer Anna Schumaker <Anna.Schumaker@Netapp.com> 1446489915 -0500

xprtrdma: Use workqueue to process RPC/RDMA replies

The reply tasklet is fast, but it's single threaded. After reply
traffic saturates a single CPU, there's no more reply processing
capacity.

Replace the tasklet with a workqueue to spread reply handling across
all CPUs.  This also moves RPC/RDMA reply handling out of the soft
IRQ context and into a context that allows sleeps.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Tested-By: Devesh Sharma <devesh.sharma@avagotech.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>