Re: io_uring process termination/killing is not working

Jens Axboe
2020-08-15T22:35:05Z

On 8/15/20 2:43 PM, Josef wrote:
> it seems to be that read event doesn't work properly, but I'm not sure
> if it is related to what Pavel mentioned
> poll accept works but not poll read -> cqe still receives
> poll event but no read event, however I received a read event after
> the third request via telnet
>
> I just tested https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=io_uring-5.9&id=d4e7cd36a90e38e0276d6ce0c20f5ccef17ec38c
> and
> https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=io_uring-5.9&id=227c0c9673d86732995474d277f84e08ee763e46
> (but it works on Linux 5.7)

I'll take a look. BTW, you seem to be using links in a funny way. You set the
IOSQE_IO_LINK on the start of a link chain, and then the chain stops when
you _don't_ have that flag set. You just set it on everything, then
work-around it with a NOP?

For this example, only the poll should have IOSQE_IO_LINK set, accept
and read should not.

This isn't causing your issue, just wanted to clarify how links are
used.

--
Jens Axboe