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authorTrond Myklebust <trond.myklebust@primarydata.com>2018-02-07 17:13:04 +0300
committerTrond Myklebust <trond.myklebust@primarydata.com>2018-02-07 17:25:52 +0300
commit2275cde4ccb319ae1eb1c6c717f0e547e62019ee (patch)
tree21cc3a457909badb0fbefae2e4c05290e89b336a /net
parent0c8cbcd337aeae013bb6230f13b77dde0735758f (diff)
downloadlinux-2275cde4ccb319ae1eb1c6c717f0e547e62019ee.tar.xz
SUNRPC: Queue latency-sensitive socket tasks to xprtiod
The response to a write_space notification is very latency sensitive, so we should queue it to the lower latency xprtiod_workqueue. This is something we already do for the other cases where an rpc task holds the transport XPRT_LOCKED bitlock. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/sched.c12
-rw-r--r--net/sunrpc/xprt.c3
2 files changed, 14 insertions, 1 deletions
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index 896691afbb1a..96fdf6011c53 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -461,6 +461,18 @@ static void rpc_wake_up_task_queue_locked(struct rpc_wait_queue *queue, struct r
/*
* Wake up a task on a specific queue
*/
+void rpc_wake_up_queued_task_on_wq(struct workqueue_struct *wq,
+ struct rpc_wait_queue *queue,
+ struct rpc_task *task)
+{
+ spin_lock_bh(&queue->lock);
+ rpc_wake_up_task_on_wq_queue_locked(wq, queue, task);
+ spin_unlock_bh(&queue->lock);
+}
+
+/*
+ * Wake up a task on a specific queue
+ */
void rpc_wake_up_queued_task(struct rpc_wait_queue *queue, struct rpc_task *task)
{
spin_lock_bh(&queue->lock);
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 2436fd1125fc..8f0ad4f268da 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -517,7 +517,8 @@ void xprt_write_space(struct rpc_xprt *xprt)
if (xprt->snd_task) {
dprintk("RPC: write space: waking waiting task on "
"xprt %p\n", xprt);
- rpc_wake_up_queued_task(&xprt->pending, xprt->snd_task);
+ rpc_wake_up_queued_task_on_wq(xprtiod_workqueue,
+ &xprt->pending, xprt->snd_task);
}
spin_unlock_bh(&xprt->transport_lock);
}