Now that RPC replies are processed in a workqueue, there's no need to disable IRQs when managing send and receive buffers. This saves noticeable overhead per RPC.
Signed-off-by: Chuck Lever <[email protected]> Reviewed-by: Sagi Grimberg <[email protected]> Tested-By: Devesh Sharma <[email protected]> --- net/sunrpc/xprtrdma/verbs.c | 24 ++++++++++-------------- 1 file changed, 10 insertions(+), 14 deletions(-) diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index 3dd5a7c..baa0523 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -1063,24 +1063,23 @@ struct rpcrdma_req * rpcrdma_buffer_get(struct rpcrdma_buffer *buffers) { struct rpcrdma_req *req; - unsigned long flags; - spin_lock_irqsave(&buffers->rb_lock, flags); + spin_lock(&buffers->rb_lock); if (list_empty(&buffers->rb_send_bufs)) goto out_reqbuf; req = rpcrdma_buffer_get_req_locked(buffers); if (list_empty(&buffers->rb_recv_bufs)) goto out_repbuf; req->rl_reply = rpcrdma_buffer_get_rep_locked(buffers); - spin_unlock_irqrestore(&buffers->rb_lock, flags); + spin_unlock(&buffers->rb_lock); return req; out_reqbuf: - spin_unlock_irqrestore(&buffers->rb_lock, flags); + spin_unlock(&buffers->rb_lock); pr_warn("RPC: %s: out of request buffers\n", __func__); return NULL; out_repbuf: - spin_unlock_irqrestore(&buffers->rb_lock, flags); + spin_unlock(&buffers->rb_lock); pr_warn("RPC: %s: out of reply buffers\n", __func__); req->rl_reply = NULL; return req; @@ -1095,16 +1094,15 @@ rpcrdma_buffer_put(struct rpcrdma_req *req) { struct rpcrdma_buffer *buffers = req->rl_buffer; struct rpcrdma_rep *rep = req->rl_reply; - unsigned long flags; req->rl_niovs = 0; req->rl_reply = NULL; - spin_lock_irqsave(&buffers->rb_lock, flags); + spin_lock(&buffers->rb_lock); list_add_tail(&req->rl_free, &buffers->rb_send_bufs); if (rep) list_add_tail(&rep->rr_list, &buffers->rb_recv_bufs); - spin_unlock_irqrestore(&buffers->rb_lock, flags); + spin_unlock(&buffers->rb_lock); } /* @@ -1115,12 +1113,11 @@ void rpcrdma_recv_buffer_get(struct rpcrdma_req *req) { struct rpcrdma_buffer *buffers = req->rl_buffer; - unsigned long flags; - spin_lock_irqsave(&buffers->rb_lock, flags); + spin_lock(&buffers->rb_lock); if (!list_empty(&buffers->rb_recv_bufs)) req->rl_reply = rpcrdma_buffer_get_rep_locked(buffers); - spin_unlock_irqrestore(&buffers->rb_lock, flags); + spin_unlock(&buffers->rb_lock); } /* @@ -1131,11 +1128,10 @@ void rpcrdma_recv_buffer_put(struct rpcrdma_rep *rep) { struct rpcrdma_buffer *buffers = &rep->rr_rxprt->rx_buf; - unsigned long flags; - spin_lock_irqsave(&buffers->rb_lock, flags); + spin_lock(&buffers->rb_lock); list_add_tail(&rep->rr_list, &buffers->rb_recv_bufs); - spin_unlock_irqrestore(&buffers->rb_lock, flags); + spin_unlock(&buffers->rb_lock); } /* -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
