Re: [PATCH 2/2] io_uring: introduce non-circular SQ

[Jens Axboe <axboe@kernel.dk>]

On 10/14/25 4:58 AM, Pavel Begunkov wrote:
> diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h
> index a0cc1cc0dd01..d1c654a7fa9a 100644
> --- a/include/uapi/linux/io_uring.h
> +++ b/include/uapi/linux/io_uring.h
> @@ -231,6 +231,12 @@ enum io_uring_sqe_flags_bit {
>   */
>  #define IORING_SETUP_CQE_MIXED		(1U << 18)
>  
> +/*
> + * SQEs always start at index 0 in the submission ring instead of using a
> + * wrap around indexing.
> + */
> +#define IORING_SETUP_SQ_REWIND		(1U << 19)

No real comments on this patch, very straightforward. I do think this
comment should be expanded on considerably, mostly just by adding a
comparison to how it's different from the normal non-rewind way of
tracking which SQEs to submit. I can do it too, or send a v2.

-- 
Jens Axboe