[LTP] [RFC] sched/starvation: Add disclaimer for virtualized/emulated environments

[Alessandro Carminati <acarmina@redhat.com>]

This patch adds a disclaimer message to the starvation test case, warning
users against running the test in virtualized or emulated environments.
The test produces expected results only on bare-metal systems and is prone
to failure when executed in non-bare-metal setups.

While detecting virtualization or emulation is possible in some cases,
the methods are unreliable.
Rather than attempting to prevent the test from running in such
environments, this patch provides a warning to inform users of the
limitations.

Change:
- Added a TINFO message to notify users that the test should be run
  on bare-metal systems for meaningful results.

Signed-off-by: Alessandro Carminati <acarmina@redhat.com>
---
 testcases/kernel/sched/cfs-scheduler/starvation.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/testcases/kernel/sched/cfs-scheduler/starvation.c b/testcases/kernel/sched/cfs-scheduler/starvation.c
index c620c9c3e..b779a5f0a 100644
--- a/testcases/kernel/sched/cfs-scheduler/starvation.c
+++ b/testcases/kernel/sched/cfs-scheduler/starvation.c
@@ -115,6 +115,9 @@ static void setup(void)
 	if (tst_has_slow_kconfig())
 		tst_brk(TCONF, "Skip test due to slow kernel configuration");
 
+	tst_res(TINFO, "This test is designed to run on bare-metal systems. "
+		"Running it in a virtualized or emulated environment may produce unreliable results.");
+
 	tst_set_runtime(timeout);
 }
 
-- 
2.34.1


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