From: Pavel Begunkov <asml.silence@gmail.com>
Date: Sat, 10 Oct 2020 17:34:05 +0000 (+0100)
Subject: io_uring: don't io_prep_async_work() linked reqs
X-Git-Tag: baikal/mips/sdk5.9~12522^2~11
X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=0566316fb30dd8a90ad29f1e730a5527d99a52cb;p=kernel.git

io_uring: don't io_prep_async_work() linked reqs

There is no real reason left for preparing io-wq work context for linked
requests in advance, remove it as this might become a bottleneck in some
cases.

Reported-by: Roman Gershman <romger@amazon.com>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 09494ca1b9909..272abe03a79e9 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -5672,9 +5672,6 @@ static int io_req_defer_prep(struct io_kiocb *req,
 	ret = io_prep_work_files(req);
 	if (unlikely(ret))
 		return ret;
-
-	io_prep_async_work(req);
-
 	return io_req_prep(req, sqe);
 }