[LTP] [PATCH v2 1/3] syscalls/tgkill01: add new test

[Cyril Hrubis <chrubis@suse.cz>]

Hi!
> >>  int tst_checkpoint_wait(unsigned int id, unsigned int msec_timeout)
> >>  {
> >>         struct timespec timeout;
> >> +       int ret;
> >>
> >>         if (id >= tst_max_futexes) {
> >>                 errno = EOVERFLOW;
> >> @@ -94,8 +95,12 @@ int tst_checkpoint_wait(unsigned int id, unsigned int msec_timeout)
> >>         timeout.tv_sec = msec_timeout/1000;
> >>         timeout.tv_nsec = (msec_timeout%1000) * 1000000;
> >>
> >> -       return syscall(SYS_futex, &tst_futexes[id], FUTEX_WAIT,
> >> -                      tst_futexes[id], &timeout);
> >> +       do {
> >> +               ret = syscall(SYS_futex, &tst_futexes[id], FUTEX_WAIT,
> >> +                             tst_futexes[id], &timeout);
> >
> >     if (ret == -1 && errno == EINTR)
> >         tst_res(TWARN | TERRNO, "FUTEX_WAIT operation was interrupted by a signal, retry again");
> >
> 
> I am not sure if this warning message is desired for test-cases which
> needs to wait on checkpoints irrespective of signals like this
> tgkill01 test-case.

Agreed, it's not an error condition, it's just a coincidence that most
of the tests does not get signals when they sleep on futex, otherwise
thing would crash and burn. So I would argue that retrying on EINTR is
actually a bug fix rather than anything else.

-- 
Cyril Hrubis
chrubis@suse.cz