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authorTom Tucker <tom@opengridcomputing.com>2008-05-06 11:49:05 -0500
committerTom Tucker <tom@opengridcomputing.com>2008-05-19 07:33:53 -0500
commit47698e083e40bbd3ef87f5561390ae33abb13cd0 (patch)
tree116427837fc578ad419068306e94adb2daa8fdb1 /net
parent8740767376b32a7772607e1b2b07cde0c24120cc (diff)
downloadop-kernel-dev-47698e083e40bbd3ef87f5561390ae33abb13cd0.zip
op-kernel-dev-47698e083e40bbd3ef87f5561390ae33abb13cd0.tar.gz
svcrdma: Shrink scope of spinlock on RQ CQ
The rq_cq_reap function is only called from the dto_tasklet. The only resource shared with other threads is the sc_rq_dto_q. Move the spin lock to protect only this list. Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_transport.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index 817cf4d..78303f0 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -292,7 +292,6 @@ static void rq_cq_reap(struct svcxprt_rdma *xprt)
ib_req_notify_cq(xprt->sc_rq_cq, IB_CQ_NEXT_COMP);
atomic_inc(&rdma_stat_rq_poll);
- spin_lock_bh(&xprt->sc_rq_dto_lock);
while ((ret = ib_poll_cq(xprt->sc_rq_cq, 1, &wc)) > 0) {
ctxt = (struct svc_rdma_op_ctxt *)(unsigned long)wc.wr_id;
ctxt->wc_status = wc.status;
@@ -303,9 +302,10 @@ static void rq_cq_reap(struct svcxprt_rdma *xprt)
svc_rdma_put_context(ctxt, 1);
continue;
}
+ spin_lock_bh(&xprt->sc_rq_dto_lock);
list_add_tail(&ctxt->dto_q, &xprt->sc_rq_dto_q);
+ spin_unlock_bh(&xprt->sc_rq_dto_lock);
}
- spin_unlock_bh(&xprt->sc_rq_dto_lock);
if (ctxt)
atomic_inc(&rdma_stat_rq_prod);
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