From 67c4d9e693e3bb7fb968af24e3584f821a78ba56 Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@gmail.com>
Date: Mon, 15 Jun 2020 10:24:05 +0300
Subject: [PATCH] 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>
---
fs/io_uring.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index ad5128a40c146..b6bcd5a7f4bc3 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);
--
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