tmakin/ack-tegra
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

io_uring: add io_file_can_poll() helper

Browse Source 
This adds a flag to avoid dipping dereferencing file and then f_op to
figure out if the file has a poll handler defined or not. We generally
call this at least twice for networked workloads, and if using ring
provided buffers, we do it on every buffer selection. Particularly the
latter is troublesome, as it's otherwise a very fast operation.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
2024-01-28 20:08:24 -07:00
parent 521223d7c2
commit 95041b93e9
6 changed files with 21 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files
io_uring/kbuf.c
+1 -1
View File
@@ -180,7 +180,7 @@ static void __user *io_ring_buffer_select(struct io_kiocb *req, size_t *len,
req->buf_list = bl;
req->buf_index = buf->bid;
if (issue_flags & IO_URING_F_UNLOCKED || !file_can_poll(req->file)) {
if (issue_flags & IO_URING_F_UNLOCKED || !io_file_can_poll(req)) {
/*
* If we came in unlocked, we have no choice but to consume the
* buffer here, otherwise nothing ensures that the buffer won't