From fff4e40e3094972b119e38c8f0de4e1ca9fec654 Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@gmail.com>
Date: Mon, 4 Oct 2021 20:02:48 +0100
Subject: [PATCH] io_uring: delay req queueing into compl-batch list
Git-commit: fff4e40e3094972b119e38c8f0de4e1ca9fec654
Patch-mainline: v5.16-rc1
References: bsc#1205205
io_req_complete_state() is inlined and used in lots of places, so we
want to keep it concise. Move adding a request into a completion batch
list from io_req_complete_state() into the consumer, i.e.
__io_queue_sqe().
before vs after
text data bss dec hex filename
91894 14002 8 105904 19db0 ./fs/io_uring.o
91046 14002 8 105056 19a60 ./fs/io_uring.o
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/4afca4e11abfd4cc8e99777fdcaf4d34cf4d022d.1633373302.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>
---
fs/io_uring.c | 26 ++++++++++++++++----------
1 file changed, 16 insertions(+), 10 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index bc87ed85f206..045474b7b9c2 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1446,6 +1446,13 @@ static void io_prep_async_link(struct io_kiocb *req)
}
}
+static inline void io_req_add_compl_list(struct io_kiocb *req)
+{
+ struct io_submit_state *state = &req->ctx->submit_state;
+
+ wq_list_add_tail(&req->comp_list, &state->compl_reqs);
+}
+
static void io_queue_async_work(struct io_kiocb *req, bool *locked)
{
struct io_ring_ctx *ctx = req->ctx;
@@ -1820,20 +1827,15 @@ static inline bool io_req_needs_clean(struct io_kiocb *req)
return req->flags & IO_REQ_CLEAN_FLAGS;
}
-static void io_req_complete_state(struct io_kiocb *req, long res,
- unsigned int cflags)
+static inline void io_req_complete_state(struct io_kiocb *req, long res,
+ unsigned int cflags)
{
- struct io_submit_state *state;
-
/* clean per-opcode space, because req->compl is aliased with it */
if (io_req_needs_clean(req))
io_clean_op(req);
req->result = res;
req->compl.cflags = cflags;
req->flags |= REQ_F_COMPLETE_INLINE;
-
- state = &req->ctx->submit_state;
- wq_list_add_tail(&req->comp_list, &state->compl_reqs);
}
static inline void __io_req_complete(struct io_kiocb *req, unsigned issue_flags,
@@ -2626,10 +2628,12 @@ static void io_req_task_complete(struct io_kiocb *req, bool *locked)
unsigned int cflags = io_put_rw_kbuf(req);
long res = req->result;
- if (*locked)
+ if (*locked) {
io_req_complete_state(req, res, cflags);
- else
+ io_req_add_compl_list(req);
+ } else {
io_req_complete_post(req, res, cflags);
+ }
}
static void __io_complete_rw(struct io_kiocb *req, long res, long res2,
@@ -6886,8 +6890,10 @@ static inline void __io_queue_sqe(struct io_kiocb *req)
ret = io_issue_sqe(req, IO_URING_F_NONBLOCK|IO_URING_F_COMPLETE_DEFER);
- if (req->flags & REQ_F_COMPLETE_INLINE)
+ if (req->flags & REQ_F_COMPLETE_INLINE) {
+ io_req_add_compl_list(req);
return;
+ }
/*
* We async punt it if the file wasn't marked NOWAIT, or if the file
* doesn't support non-blocking read/write attempts
--
2.35.3