From: Pavel Begunkov <asml.silence@gmail.com>
Date: Mon, 15 Jun 2020 07:24:05 +0000 (+0300)
Subject: io_uring: batch cancel in io_uring_cancel_files()
X-Git-Tag: v5.15~3539^2~7
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=67c4d9e693e3bb7fb968af24e3584f821a78ba56;p=platform%2Fkernel%2Flinux-starfive.git

io_uring: batch cancel in io_uring_cancel_files()

Instead of waiting for each request one by one, first try to cancel all
of them in a batched manner, and then go over inflight_list/etc to reap
leftovers.

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 ad5128a..b6bcd5a 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -7366,9 +7366,22 @@ static int io_uring_release(struct inode *inode, struct file *file)
 	return 0;
 }
 
+static bool io_wq_files_match(struct io_wq_work *work, void *data)
+{
+	struct files_struct *files = data;
+
+	return work->files == files;
+}
+
 static void io_uring_cancel_files(struct io_ring_ctx *ctx,
 				  struct files_struct *files)
 {
+	if (list_empty_careful(&ctx->inflight_list))
+		return;
+
+	/* cancel all at once, should be faster than doing it one by one*/
+	io_wq_cancel_cb(ctx->io_wq, io_wq_files_match, files, true);
+
 	while (!list_empty_careful(&ctx->inflight_list)) {
 		struct io_kiocb *cancel_req = NULL, *req;
 		DEFINE_WAIT(wait);