Re: [PATCH 0/8] iopoll and task_work fixes

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

On 30/06/2020 15:20, Pavel Begunkov wrote:
> [1-3] are iopoll fixes, where a bug in [1] I unfortenatuly added
> yesterday. [4-6] are task_work related.

I think there are even more bugs. I'll just leave it here, if somebody
wants to take a look.

- I have a hunch that linked timeouts are broken, probably all these
re-submits cause double io_queue_linked_timeout().

- select-buf may be if not leaking, then not reported to a user
in some cases. Worth to check.

- timeout-overflow test failed for me sometime ago. I think that's bulk
completion related. I sent a patch for a very similar bug, but it got
lost.


> Tell me, if something from it is needed for 5.8
> 
> Pavel Begunkov (8):
>   io_uring: fix io_fail_links() locking
>   io_uring: fix commit_cqring() locking in iopoll
>   io_uring: fix ignoring eventfd in iopoll
>   io_uring: fix missing ->mm on exit
>   io_uring: don't fail iopoll requeue without ->mm
>   io_uring: fix NULL mm in io_poll_task_func()
>   io_uring: simplify io_async_task_func()
>   io_uring: optimise io_req_find_next() fast check
> 
>  fs/io_uring.c | 79 +++++++++++++++++++++------------------------------
>  1 file changed, 33 insertions(+), 46 deletions(-)
> 

-- 
Pavel Begunkov