Re: [PATCH 2/2] Use io_ring_register_ring_fd() to skip fd operations

[olc]

Thanks for noticing the problem. I've done that.

Sam

Damien Le Moal <Damien.LeMoal@wdc.com> 于2022年4月19日周二 06:24写道：

On 2022/04/18 18:05, Sam Li wrote:
> fix code style issue.

This patch must be squashed into the previous one.

>
> Signed-off-by: Sam Li <faithilikerun@gmail.com>
> ---
>  block/io_uring.c | 9 +++++++--
>  1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/block/io_uring.c b/block/io_uring.c
> index 2942967126..57745ecfa1 100644
> --- a/block/io_uring.c
> +++ b/block/io_uring.c
> @@ -436,10 +436,15 @@ LuringState *luring_init(Error **errp)
> 
>      ioq_init(&s->io_q);
>      if (io_uring_register_ring_fd(&s->ring) < 0) {
> -        error_setg_errno(errp, errno, "failed to register linux io_uring ring file descriptor");
> +        /*
> +         * If the function fails, it will fallback to the non-optimized io_uring
> +         * operations.
> +         */

The comment wording is a little odd: given that the comment is inside the "if",
meaning that we are in the case "the function failed", saying "if the function
fails..." is strange. You could simply state something like:

        /*
         * Only warn about this error: we will fall back to the non-optimized
         * io_uring operations.
         */

> +        error_setg_errno(errp, errno,
> +                         "failed to register linux io_uring ring file descriptor");
>      }
> -    return s;
> 
> +    return s;
>  }
> 
>  void luring_cleanup(LuringState *s)


--
Damien Le Moal
Western Digital Research