Commit e19b63da authored by Chuck Lever's avatar Chuck Lever Committed by Trond Myklebust
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SUNRPC: track length of RPC wait queues

RPC wait queue length will eventually be exported to userland via the RPC
iostats interface.

Test plan:
Compile kernel with CONFIG_NFS enabled.
Signed-off-by: default avatarChuck Lever <>
Signed-off-by: default avatarTrond Myklebust <>
parent 67ec9f46
......@@ -203,6 +203,7 @@ struct rpc_wait_queue {
unsigned char priority; /* current priority */
unsigned char count; /* # task groups remaining serviced so far */
unsigned char nr; /* # tasks remaining for cookie */
unsigned short qlen; /* total # tasks waiting in queue */
#ifdef RPC_DEBUG
const char * name;
......@@ -181,6 +181,7 @@ static void __rpc_add_wait_queue(struct rpc_wait_queue *queue, struct rpc_task *
list_add_tail(&task->u.tk_wait.list, &queue->tasks[0]);
task->u.tk_wait.rpc_waitq = queue;
dprintk("RPC: %4d added to queue %p \"%s\"\n",
......@@ -215,6 +216,7 @@ static void __rpc_remove_wait_queue(struct rpc_task *task)
dprintk("RPC: %4d removed from queue %p \"%s\"\n",
task->tk_pid, queue, rpc_qname(queue));
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