linux-kernel - [PATCH 2/3] io_uring: move trace_submit_sqe into submit

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Date:   Tue, 17 Dec 2019 22:26:57 +0300
From:   Pavel Begunkov <asml.silence@...il.com>
To:     Jens Axboe <axboe@...nel.dk>, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] io_uring: move trace_submit_sqe into submit_sqe

For better locality, call trace_io_uring_submit_sqe() from submit_sqe()
rather than io_submit_sqes(). No functional change.

Signed-off-by: Pavel Begunkov <asml.silence@...il.com>
---
 fs/io_uring.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index e8ce224dc82c..ee461bcd3121 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3375,7 +3375,8 @@ static bool io_submit_sqe(struct io_kiocb *req, struct io_submit_state *state,
 	struct io_ring_ctx *ctx = req->ctx;
 	int ret;
 
-	req->user_data = req->sqe->user_data;
+	req->user_data = READ_ONCE(req->sqe->user_data);
+	trace_io_uring_submit_sqe(ctx, req->user_data, true, req->in_async);
 
 	/* enforce forwards compatibility on users */
 	if (unlikely(req->sqe->flags & ~SQE_VALID_FLAGS)) {
@@ -3569,8 +3570,6 @@ static int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr,
 		req->has_user = *mm != NULL;
 		req->in_async = async;
 		req->needs_fixed_file = async;
-		trace_io_uring_submit_sqe(ctx, req->sqe->user_data,
-					  true, async);
 		if (!io_submit_sqe(req, statep, &link))
 			break;
 		/*
-- 
2.24.0