[LTP] [PATCH v4] Add epoll_wait05 test

[Cyril Hrubis]

Hi!
> This test verifies that epoll receives EPOLLRDHUP event when we hang
> a reading half-socket we are polling on.
> 
> Implements: https://github.com/linux-test-project/ltp/issues/860
> Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>

...

> +/*\
> + * [Description]
> + *
> + * Verify that epoll receives EPOLLRDHUP event when we hang a reading
> + * half-socket we are polling on.
> + *
> + * As reference please check https://lwn.net/Articles/864947/

I'm a bit confused here, the test itself looks good, but it references
an article and a kernel commit that changed how polling on _pipe_ works.
The kernel change literally changes only pipe_write() in fs/pipe.c and
this test actually tests inet sockets.

I guess that the confusion is caused by the fact that the github issue
referenced the lwn.net article as a reason why we need more epoll
coverage, but these tests are not directly related to that commit at
all.

-- 
Cyril Hrubis
chrubis@suse.cz