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

[Pavel Begunkov <asml.silence@gmail.com>]

On 10/14/25 18:21, Jens Axboe wrote:
> 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.

Please do if that's fine with you. Not entirely sure how you
want to put it into words.

-- 
Pavel Begunkov