Re: [PATCH 0/4] address some hangs

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

On 31/12/2020 15:07, Jens Axboe wrote:
> On 12/30/20 2:34 PM, Pavel Begunkov wrote:
>> 1/4 and 2/4 are for hangs during files unregister.
>>
>> The other two fix not running task works during cancellation.
>> Instead of patching task_work it moves io_uring_files_cancel()
>> before PF_EXITING, should be less intrusive. Was there a
>> particular reasong for doing that in exit_files()?
>>
>> Pavel Begunkov (4):
>>   io_uring: add a helper for setting a ref node
>>   io_uring: fix io_sqe_files_unregister() hangs
>>   kernel/io_uring: cancel io_uring before task works
>>   io_uring: cancel requests enqueued as task_work's
>>
>>  fs/file.c     |  2 --
>>  fs/io_uring.c | 54 ++++++++++++++++++++++++++++++++++-----------------
>>  kernel/exit.c |  2 ++
>>  3 files changed, 38 insertions(+), 20 deletions(-)
> 
> Applied 1-3, as they look good. Can you resend 4/4 with the return
> added?

1-3 should fix the problems, so let's put off 4 for later and not
for current.

-- 
Pavel Begunkov