From 9983028e7660a2cc5e58403d8ce29569dbf3162d Mon Sep 17 00:00:00 2001 From: Pavel Begunkov Date: Fri, 15 Oct 2021 17:09:11 +0100 Subject: io_uring: optimise req->ctx reloads Don't load req->ctx in advance, it takes an extra register and the field stays valid even after opcode handlers. It also optimises out req->ctx load in io_iopoll_req_issued() once it's inlined. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/1e45ff671c44be0eb904f2e448a211734893fa0b.1634314022.git.asml.silence@gmail.com Signed-off-by: Jens Axboe --- fs/io_uring.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'fs') diff --git a/fs/io_uring.c b/fs/io_uring.c index a2f989e84583..5a4d13ad1277 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -6588,7 +6588,6 @@ static void io_clean_op(struct io_kiocb *req) static int io_issue_sqe(struct io_kiocb *req, unsigned int issue_flags) { - struct io_ring_ctx *ctx = req->ctx; const struct cred *creds = NULL; int ret; @@ -6715,7 +6714,7 @@ static int io_issue_sqe(struct io_kiocb *req, unsigned int issue_flags) if (ret) return ret; /* If the op doesn't have a file, we're not polling for it */ - if ((ctx->flags & IORING_SETUP_IOPOLL) && req->file) + if ((req->ctx->flags & IORING_SETUP_IOPOLL) && req->file) io_iopoll_req_issued(req); return 0; -- cgit v1.2.3