Re: [PATCH io_uring-7.0] io_uring/query: return support for custom rx page size

[Jens Axboe <axboe@kernel.dk>]

On 2/15/26 3:11 PM, Pavel Begunkov wrote:
> On 2/15/26 22:06, Jens Axboe wrote:
>> On 2/15/26 2:34 PM, Pavel Begunkov wrote:
>>> diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h
>>> index fc473af6feb4..6750c383a2ab 100644
>>> --- a/include/uapi/linux/io_uring.h
>>> +++ b/include/uapi/linux/io_uring.h
>>> @@ -1090,6 +1090,14 @@ enum zcrx_reg_flags {
>>>       ZCRX_REG_IMPORT    = 1,
>>>   };
>>>   +enum zcrx_features {
>>> +    /*
>>> +     * The user can ask for the desired rx page size by passing the
>>> +     * value in struct io_uring_zcrx_ifq_reg::rx_buf_len.
>>> +     */
>>> +    ZCRX_FEATURE_RX_PAGE_SIZE    = 1 << 0,
>>> +};
>>
>> Well I guess one comment - supposedly ->rx_buf_len is going to be added
>> in the future? Because right now it's not there.
> 
> # git blame include/uapi/linux/io_uring.h | grep rx_buf_len
> 795663b4d160b (Pavel Begunkov          2026-01-24 10:36:17 +0000 1115)  __u32   rx_buf_len;
> 
> commit 795663b4d160ba652959f1a46381c5e8b1342a53 (tag: for-7.0/io_uring-zcrx-large-buffers-20260206, axboe2/for-7.0/io_uring-zcrx-large-buffers)
> Author: Pavel Begunkov <asml.silence@gmail.com>
> Date:   Sat Jan 24 10:36:17 2026 +0000
> 
>     io_uring/zcrx: implement large rx buffer support
> 
> 
> You should've already forwarded it to Linus with
> "[GIT PULL] Large buffer support for zcrx".

Ah this is why, io_uring-7.0 is behind master as the large buffer
support got merged post the netdev PR. OK all good then, it'll be fine
once merged!

-- 
Jens Axboe