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| author |   Chuck Lever <chuck.lever@oracle.com> | 2017-12-14 20:57:39 -0500 |
|---|---|---|
| committer |   Anna Schumaker <Anna.Schumaker@Netapp.com> | 2018-01-16 11:19:49 -0500 |
| commit | 30b5416bf0fd3bfef55543343ad1e85d32e32de4 (patch) | |
| tree | eafc8d8a7744c4948856df963ed02ab318886964 /net | |
| parent | xprtrdma: Split xprt_rdma_send_request (diff) | |
| download | linux-dev-30b5416bf0fd3bfef55543343ad1e85d32e32de4.tar.xz linux-dev-30b5416bf0fd3bfef55543343ad1e85d32e32de4.zip | |
xprtrdma: Don't clear RPC_BC_PA_IN_USE on pre-allocated rpc_rqst's
No need for the overhead of atomically setting and clearing this bit
flag for every use of a pre-allocated backchannel rpc_rqst. These
are a distinct pool of rpc_rqsts that are used only for callback
operations, so it is safe to simply leave the bit set.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/xprtrdma/backchannel.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/net/sunrpc/xprtrdma/backchannel.c b/net/sunrpc/xprtrdma/backchannel.c index 6c66a4f85507..3c7998a72191 100644 --- a/net/sunrpc/xprtrdma/backchannel.c +++ b/net/sunrpc/xprtrdma/backchannel.c @@ -120,6 +120,7 @@ int xprt_rdma_bc_setup(struct rpc_xprt *xprt, unsigned int reqs) rqst->rq_xprt = &r_xprt->rx_xprt; INIT_LIST_HEAD(&rqst->rq_list); INIT_LIST_HEAD(&rqst->rq_bc_list); + __set_bit(RPC_BC_PA_IN_USE, &rqst->rq_bc_pa_state); if (rpcrdma_bc_setup_rqst(r_xprt, rqst)) goto out_free; @@ -284,11 +285,6 @@ void xprt_rdma_bc_free_rqst(struct rpc_rqst *rqst) dprintk("RPC: %s: freeing rqst %p (req %p)\n", __func__, rqst, rpcr_to_rdmar(rqst)); - smp_mb__before_atomic(); - WARN_ON_ONCE(!test_bit(RPC_BC_PA_IN_USE, &rqst->rq_bc_pa_state)); - clear_bit(RPC_BC_PA_IN_USE, &rqst->rq_bc_pa_state); - smp_mb__after_atomic(); - spin_lock_bh(&xprt->bc_pa_lock); list_add_tail(&rqst->rq_bc_pa_list, &xprt->bc_pa_list); spin_unlock_bh(&xprt->bc_pa_lock); @@ -343,7 +339,6 @@ void rpcrdma_bc_receive_call(struct rpcrdma_xprt *r_xprt, rqst->rq_xid = *p; rqst->rq_private_buf.len = size; - set_bit(RPC_BC_PA_IN_USE, &rqst->rq_bc_pa_state); buf = &rqst->rq_rcv_buf; memset(buf, 0, sizeof(*buf)); |