Re: io_uring: should IORING_TIMEOUT_ABS honour the submitter's time namespace?

[Jens Axboe <axboe@kernel.dk>]

On 5/4/26 1:48 AM, Pavel Begunkov wrote:
> On 5/4/26 07:06, Jens Axboe wrote:
>>> While verifying SQPOLL, I also noticed io_uring/wait.c around lines
>>> 230-234. The IORING_ENTER_ABS_TIMER path on io_uring_enter() parses
>>> ext_arg->ts inline rather than going through io_parse_user_time, so it
>>> does not pick up your fix. Same shape of bug, separate code path. PoC
>>> on vanilla shows elapsed = 1 ms, patched shows ~1000 ms. I can send
>>> the small follow-up patch for that path as a separate thread once your
>>> IORING_OP_TIMEOUT side has landed, or fold it into the same series.
>>> Whichever you prefer.
> 
> Yeah, I noticed that as well
> 
>> Might make sense to refactor a helper that does the time translation,
>> and then patch 1 would basically be Pavel's fix and patch 2 would be
>> sorting out the io_cqring_wait() translation as well. Both should be
>> able to use the refactored helper.
> 
> Unless there is some more unification b/w cq wait and timeout requests,
> it'll very likely be cleaner to have two timens_ktime_to_host() call
> sites, but I haven't taken a look

That'd be fine too.

-- 
Jens Axboe