On 2/27/25 8:54 AM, Pavel Begunkov wrote:
> On 2/26/25 18:20, Keith Busch wrote:
>> From: Keith Busch <kbusch@xxxxxxxxxx>
>>
>> Provide an interface for the kernel to leverage the existing
>> pre-registered buffers that io_uring provides. User space can reference
>> these later to achieve zero-copy IO.
>>
>> User space must register an empty fixed buffer table with io_uring in
>> order for the kernel to make use of it.
>
> Can you also fail rw.c:loop_rw_iter()? Something like:
>
> loop_rw_iter() {
> if ((req->flags & REQ_F_BUF_NODE) &&
> req->buf_node->buf->release)
> return -EFAULT;
> }
Good point...
--
Jens Axboe
