From: Pavel Begunkov <[email protected]>
To: Jens Axboe <[email protected]>, [email protected]
Cc: [email protected]
Subject: Re: [PATCH 1/1] io_uring: fix short read retries for non-reg files
Date: Wed, 20 Jan 2021 23:50:35 +0000 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <096d4c7e2615704c08786fe793e91ad8b22cb9f9.1611184076.git.asml.silence@gmail.com>
On 20/01/2021 23:09, Pavel Begunkov wrote:
> Sockets and other non-regular files may actually expect short reads to
> happen, don't retry reads for them.
Works well with a quick test, but I think I may have missed a case,
please don't take it yet
>
> Cc: [email protected] # 5.9+
> Suggested-by: Jens Axboe <[email protected]>
> Signed-off-by: Pavel Begunkov <[email protected]>
> ---
> fs/io_uring.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/fs/io_uring.c b/fs/io_uring.c
> index 5f6f1e48954e..544d711b2ef0 100644
> --- a/fs/io_uring.c
> +++ b/fs/io_uring.c
> @@ -3557,6 +3557,9 @@ static int io_read(struct io_kiocb *req, bool force_nonblock,
>
> io_size -= ret;
> copy_iov:
> + if (!(req->flags & REQ_F_ISREG) && ret > 0)
> + goto done;
> +
> ret2 = io_setup_async_rw(req, iovec, inline_vecs, iter, true);
> if (ret2) {
> ret = ret2;
>
--
Pavel Begunkov
prev parent reply other threads:[~2021-01-21 3:40 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-20 23:09 [PATCH 1/1] io_uring: fix short read retries for non-reg files Pavel Begunkov
2021-01-20 23:50 ` Pavel Begunkov [this message]
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