Re: [PATCH 0/4] io_uring: avoid uring_lock for IORING_SETUP_SINGLE_ISSUER

[Jens Axboe <axboe@kernel.dk>]

On 9/2/25 7:28 PM, Jens Axboe wrote:
> On 9/2/25 4:07 PM, Caleb Sander Mateos wrote:
>> As far as I can tell, setting IORING_SETUP_SINGLE_ISSUER when creating
>> an io_uring doesn't actually enable any additional optimizations (aside
>> from being a requirement for IORING_SETUP_DEFER_TASKRUN).
> 
> Indeed. It was supposed to enable future optimizations, but they
> didn't quite materialize.
> 
>> This series leverages IORING_SETUP_SINGLE_ISSUER's guarantee that only
>> one task submits SQEs to skip taking the uring_lock mutex in the
>> submission and task work paths.
> 
> Interesting, would indeed be great to kill the lock/unlock for each
> submit and local work run. I'll take a closer look at this tomorrow.

I just noticed that you forgot to CC io-uring@vger.kernel.org on
this posting. Would you mind re-sending and doing that? LKML isn't
really useful, for anything really, the key list to CC is the
io_uring one.

-- 
Jens Axboe