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[v4,03/29] selftests/resctrl: Don't use ctrlc_handler() outside signal handling

Message ID 20231215150515.36983-4-ilpo.jarvinen@linux.intel.com
State Accepted
Commit bcd8a929a5387178d917da785896e53b0845ab37
Headers show
Series selftests/resctrl: CAT test improvements & generalized test framework | expand

Commit Message

Ilpo Järvinen Dec. 15, 2023, 3:04 p.m. UTC 
perf_event_open_llc_miss() calls ctrlc_handler() to cleanup if
perf_event_open() returns an error. Those cleanups, however, are not
the responsibility of perf_event_open_llc_miss() and it thus interferes
unnecessarily with the usual cleanup pattern. Worse yet,
ctrlc_handler() calls exit() in the end preventing the ordinary cleanup
done in the calling function from executing.

ctrlc_handler() should only be used as a signal handler, not during
normal error handling.

Remove call to ctrlc_handler() from perf_event_open_llc_miss(). As
unmounting resctrlfs and test cleanup are already handled properly
by error rollbacks in the calling functions, no other changes are
necessary.

Suggested-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
---

v3:
- Corrected typo in the changelog
---
 tools/testing/selftests/resctrl/cache.c | 1 -
 1 file changed, 1 deletion(-)
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Patch

diff --git a/tools/testing/selftests/resctrl/cache.c b/tools/testing/selftests/resctrl/cache.c
index 1fa4b86e1459..6d60a2f1b3aa 100644
--- a/tools/testing/selftests/resctrl/cache.c
+++ b/tools/testing/selftests/resctrl/cache.c
@@ -41,7 +41,6 @@  static int perf_event_open_llc_miss(pid_t pid, int cpu_no)
 				PERF_FLAG_FD_CLOEXEC);
 	if (fd_lm == -1) {
 		ksft_perror("Error opening leader");
-		ctrlc_handler(0, NULL, NULL);
 		return -1;
 	}