xprtrdma: Use workqueue to process RPC/RDMA replies

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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>

...

This commit is contained in:

Chuck Lever 2015-10-24 17:27:10 -04:00 • committed by Anna Schumaker

parent 1e465fd4ff

commit fe97b47cd6

4 changed files with 65 additions and 18 deletions

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17

net/sunrpc/xprtrdma/rpc_rdma.c

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8

net/sunrpc/xprtrdma/transport.c

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54

net/sunrpc/xprtrdma/verbs.c

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4

net/sunrpc/xprtrdma/xprt_rdma.h

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