[CRIU] [PATCH] zdtm: test -- Add trivial poll() timeout test

[Cyrill Gorcunov]

On Tue, Mar 17, 2015 at 04:37:03PM +0300, Andrew Vagin wrote:
> > +
> > +	show_timestamp("Init", time_init.tv_sec, time_init.tv_usec);
> > +
> > +	delta = 1;
> > +	ret = poll(ufds, 2, delta * 1000);
> 
> Why do you call poll() here?

To make sure it's workable on its own.

> > +
> > +		show_timestamp("From", time1.tv_sec, time1.tv_usec);
> > +
> > +		task_waiter_complete(&t, 1);
> > +		delta = 5;
> > +		ret = poll(ufds, 2, delta * 1000);
> 
> Can we call poll() in a loop to be sure that the timeout isn't expired
> during the test?

You mean to spin until some external sync event from main thread comes?

> > +		show_pollfd(ufds, 2);
> > +
> > +		if (ret && errno != EINTR) {
> 
> When can we get EINTR here?

Yes we can i think. Why can't we?

	Cyrill