io_uring: only hash regular files for async work execution

We hash regular files to avoid having multiple threads hammer on the
inode mutex, but it should not be needed on other types of files
(like sockets).

Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 3dae005bfb5677f99998f6ebae59f4ec1c69426f..e54bd469d53ad1bd44a7b12ae0b7691201e18058 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -581,7 +581,9 @@ static inline bool io_prep_async_work(struct io_kiocb *req,
                switch (req->sqe->opcode) {
                case IORING_OP_WRITEV:
                case IORING_OP_WRITE_FIXED:
-                       do_hashed = true;
+                       /* only regular files should be hashed for writes */
+                       if (req->flags & REQ_F_ISREG)
+                               do_hashed = true;
                        /* fall-through */
                case IORING_OP_READV:
                case IORING_OP_READ_FIXED: