From ef42b85a5609cd822ca0a68dd2bef2b12b5d1ca3 Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@gmail.com>
Date: Tue, 30 Apr 2024 16:42:30 +0100
Subject: [PATCH] io_uring/net: fix sendzc lazy wake polling
SEND[MSG]_ZC produces multiple CQEs via notifications, LAZY_WAKE doesn't
handle it and so disable LAZY_WAKE for sendzc polling. It should be
fine, sends are not likely to be polled in the first place.
Fixes: 6ce4a93dbb5b ("io_uring/poll: use IOU_F_TWQ_LAZY_WAKE for wakeups")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/5b360fb352d91e3aec751d75c87dfb4753a084ee.1714488419.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
io_uring/net.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/io_uring/net.c b/io_uring/net.c
index 51c41d771c50e..503debecad321 100644
--- a/io_uring/net.c
+++ b/io_uring/net.c
@@ -1198,6 +1198,7 @@ int io_send_zc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
struct io_kiocb *notif;
zc->done_io = 0;
+ req->flags |= REQ_F_POLL_NO_LAZY;
if (unlikely(READ_ONCE(sqe->__pad2[0]) || READ_ONCE(sqe->addr3)))
return -EINVAL;
--
2.30.2