From eed138d67d99312f07ed3bc326903b6808885571 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Thu, 19 Sep 2024 23:38:01 -0600
Subject: [PATCH] io_uring: improve request linking trace
Right now any link trace is listed as being linked after the head
request in the chain, but it's more useful to note explicitly which
request a given new request is chained to. Change the link trace to dump
the tail request so that chains are immediately apparent when looking at
traces.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
io_uring/io_uring.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index 11c455b638a28..d306f566a944c 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -2153,7 +2153,7 @@ static inline int io_submit_sqe(struct io_ring_ctx *ctx, struct io_kiocb *req,
* conditions are true (normal request), then just queue it.
*/
if (unlikely(link->head)) {
- trace_io_uring_link(req, link->head);
+ trace_io_uring_link(req, link->last);
link->last->link = req;
link->last = req;
--
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