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| author | Chuck Lever <chuck.lever@oracle.com> | 2015-05-26 11:53:13 -0400 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2015-06-12 13:10:37 -0400 |
| commit | 58d1dcf5a8ebb0ce8a521286a99efdd636012bf0 (patch) | |
| tree | 8fcc6ca4d9a5f1234f9f73acdd0fa0bd20a5e06c /net/sunrpc/xprtrdma/frwr_ops.c | |
| parent | 7e53df111beea8db2543424d07bdee2a630698c3 (diff) | |
| download | talos-obmc-linux-58d1dcf5a8ebb0ce8a521286a99efdd636012bf0.tar.gz talos-obmc-linux-58d1dcf5a8ebb0ce8a521286a99efdd636012bf0.zip | |
xprtrdma: Split rb_lock
/proc/lock_stat showed contention between rpcrdma_buffer_get/put
and the MR allocation functions during I/O intensive workloads.
Now that MRs are no longer allocated in rpcrdma_buffer_get(),
there's no reason the rb_mws list has to be managed using the
same lock as the send/receive buffers. Split that lock. The
new lock does not need to disable interrupts because buffer
get/put is never called in an interrupt context.
struct rpcrdma_buffer is re-arranged to ensure rb_mwlock and rb_mws
are always in a different cacheline than rb_lock and the buffer
pointers.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Tested-By: Devesh Sharma <devesh.sharma@avagotech.com>
Reviewed-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc/xprtrdma/frwr_ops.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/frwr_ops.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c index 862279267fb8..18b7305d249f 100644 --- a/net/sunrpc/xprtrdma/frwr_ops.c +++ b/net/sunrpc/xprtrdma/frwr_ops.c @@ -266,6 +266,7 @@ frwr_op_init(struct rpcrdma_xprt *r_xprt) struct ib_pd *pd = r_xprt->rx_ia.ri_pd; int i; + spin_lock_init(&buf->rb_mwlock); INIT_LIST_HEAD(&buf->rb_mws); INIT_LIST_HEAD(&buf->rb_all); |
