From: Hao Xu <[email protected]>
To: Pavel Begunkov <[email protected]>, [email protected]
Cc: Jens Axboe <[email protected]>
Subject: Re: [PATCH 4/8] io_uring: check if opcode needs poll first on arming
Date: Mon, 25 Oct 2021 16:58:15 +0800 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <9adfe4f543d984875e516fce6da35348aab48668.1634987320.git.asml.silence@gmail.com>
在 2021/10/23 下午7:13, Pavel Begunkov 写道:
> ->pollout or ->pollin are set only for opcodes that need a file, so if
> io_arm_poll_handler() tests them first we can be sure that the request
> has file set and the ->file check can be removed.
>
> Signed-off-by: Pavel Begunkov <[email protected]>
> ---
Reviewed-by: Hao Xu <[email protected]>
> fs/io_uring.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/fs/io_uring.c b/fs/io_uring.c
> index 58cb3a14d58e..bff911f951ed 100644
> --- a/fs/io_uring.c
> +++ b/fs/io_uring.c
> @@ -5584,12 +5584,10 @@ static int io_arm_poll_handler(struct io_kiocb *req)
> struct io_poll_table ipt;
> __poll_t ret, mask = EPOLLONESHOT | POLLERR | POLLPRI;
>
> - if (!req->file || !file_can_poll(req->file))
> - return IO_APOLL_ABORTED;
> - if (req->flags & REQ_F_POLLED)
> - return IO_APOLL_ABORTED;
> if (!def->pollin && !def->pollout)
> return IO_APOLL_ABORTED;
> + if (!file_can_poll(req->file) || (req->flags & REQ_F_POLLED))
> + return IO_APOLL_ABORTED;
>
> if (def->pollin) {
> mask |= POLLIN | POLLRDNORM;
>
next prev parent reply other threads:[~2021-10-25 8:58 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-23 11:13 [PATCH 0/8] for-next cleanups Pavel Begunkov
2021-10-23 11:13 ` [PATCH 1/8] io-wq: use helper for worker refcounting Pavel Begunkov
2021-10-23 11:13 ` [PATCH 2/8] io_uring: clean io_wq_submit_work()'s main loop Pavel Begunkov
2021-10-25 8:53 ` Hao Xu
2021-10-23 11:13 ` [PATCH 3/8] io_uring: clean iowq submit work cancellation Pavel Begunkov
2021-10-25 8:57 ` Hao Xu
2021-10-23 11:13 ` [PATCH 4/8] io_uring: check if opcode needs poll first on arming Pavel Begunkov
2021-10-25 8:58 ` Hao Xu [this message]
2021-10-23 11:13 ` [PATCH 5/8] io_uring: don't try io-wq polling if not supported Pavel Begunkov
2021-10-25 8:58 ` Hao Xu
2021-10-23 11:14 ` [PATCH 6/8] io_uring: clean up timeout async_data allocation Pavel Begunkov
2021-10-23 11:14 ` [PATCH 7/8] io_uring: kill unused param from io_file_supports_nowait Pavel Begunkov
2021-10-23 11:14 ` [PATCH 8/8] io_uring: clusterise ki_flags access in rw_prep Pavel Begunkov
2021-10-23 14:09 ` [PATCH 0/8] for-next cleanups Jens Axboe
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