Re: [PATCH v2 2/3] selftests/resctrl: Simplify cleanup in ctrl-c handler

["Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>]

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On Thu, 22 Feb 2024, Ilpo Järvinen wrote:

> On Thu, 22 Feb 2024, Maciej Wieczor-Retman wrote:
> 
> > Ctrl-c handler isn't aware of what test is currently running. Because of
> > that it executes all cleanups even if they aren't necessary. Since the
> > ctrl-c handler uses the sa_sigaction system no parameters can be passed
> > to it as function arguments.
> > 
> > Add a global variable to make ctrl-c handler aware of the currently run
> > test and only execute the correct cleanup callback.
> > 
> > Signed-off-by: Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com>
> > ---

> > diff --git a/tools/testing/selftests/resctrl/resctrl_val.c b/tools/testing/selftests/resctrl/resctrl_val.c
> > index 5a49f07a6c85..d572815436f3 100644
> > --- a/tools/testing/selftests/resctrl/resctrl_val.c
> > +++ b/tools/testing/selftests/resctrl/resctrl_val.c
> > @@ -62,6 +62,7 @@ struct imc_counter_config {
> >  static char mbm_total_path[1024];
> >  static int imcs;
> >  static struct imc_counter_config imc_counters_config[MAX_IMCS][2];
> > +const struct resctrl_test *current_test;
> 
> static const struct
> 
> >  void membw_initialize_perf_event_attr(int i, int j)
> >  {
> > @@ -472,7 +473,7 @@ void ctrlc_handler(int signum, siginfo_t *info, void *ptr)
> >  	if (bm_pid)
> >  		kill(bm_pid, SIGKILL);
> >  	umount_resctrlfs();
> > -	tests_cleanup();
> > +	current_test->cleanup();
> 
> These calls should have if (current_test->cleanup()) guard. Isn't the 

Err, if (current_test->cleanup) is what I meant.

> non-contiguous already test w/o the cleanup function?
> 
> Other than those two, this looked okay.

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 i.