SUNRPC: Convert the xprt->sending queue back to an ordinary wait queue

We no longer need priority semantics on the xprt->sending queue, because
the order in which tasks are sent is now dictated by their position in
the send queue.
Note that the backlog queue remains a priority queue, meaning that
slot resources are still managed in order of task priority.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 480461a..7333874 100644 (file)
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -192,7 +192,6 @@ static void xprt_clear_locked(struct rpc_xprt *xprt)
 int xprt_reserve_xprt(struct rpc_xprt *xprt, struct rpc_task *task)
 {
        struct rpc_rqst *req = task->tk_rqstp;
-       int priority;
 
        if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) {
                if (task == xprt->snd_task)
@@ -212,13 +211,7 @@ out_sleep:
                        task->tk_pid, xprt);
        task->tk_timeout = RPC_IS_SOFT(task) ? req->rq_timeout : 0;
        task->tk_status = -EAGAIN;
-       if (req == NULL)
-               priority = RPC_PRIORITY_LOW;
-       else if (!req->rq_ntrans)
-               priority = RPC_PRIORITY_NORMAL;
-       else
-               priority = RPC_PRIORITY_HIGH;
-       rpc_sleep_on_priority(&xprt->sending, task, NULL, priority);
+       rpc_sleep_on(&xprt->sending, task, NULL);
        return 0;
 }
 EXPORT_SYMBOL_GPL(xprt_reserve_xprt);
@@ -260,7 +253,6 @@ xprt_test_and_clear_congestion_window_wait(struct rpc_xprt *xprt)
 int xprt_reserve_xprt_cong(struct rpc_xprt *xprt, struct rpc_task *task)
 {
        struct rpc_rqst *req = task->tk_rqstp;
-       int priority;
 
        if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) {
                if (task == xprt->snd_task)
@@ -283,13 +275,7 @@ out_sleep:
        dprintk("RPC: %5u failed to lock transport %p\n", task->tk_pid, xprt);
        task->tk_timeout = RPC_IS_SOFT(task) ? req->rq_timeout : 0;
        task->tk_status = -EAGAIN;
-       if (req == NULL)
-               priority = RPC_PRIORITY_LOW;
-       else if (!req->rq_ntrans)
-               priority = RPC_PRIORITY_NORMAL;
-       else
-               priority = RPC_PRIORITY_HIGH;
-       rpc_sleep_on_priority(&xprt->sending, task, NULL, priority);
+       rpc_sleep_on(&xprt->sending, task, NULL);
        return 0;
 }
 EXPORT_SYMBOL_GPL(xprt_reserve_xprt_cong);
@@ -1796,7 +1782,7 @@ static void xprt_init(struct rpc_xprt *xprt, struct net *net)
 
        rpc_init_wait_queue(&xprt->binding, "xprt_binding");
        rpc_init_wait_queue(&xprt->pending, "xprt_pending");
-       rpc_init_priority_wait_queue(&xprt->sending, "xprt_sending");
+       rpc_init_wait_queue(&xprt->sending, "xprt_sending");
        rpc_init_priority_wait_queue(&xprt->backlog, "xprt_backlog");
 
        xprt_init_xid(xprt);