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selftests/futex: Set the home_node in futex_numa_mpol 

The test fails at the MPOL step if multiple nodes are available. The
reason is that mbind() sets the policy but the home_node, which is
retrieved by the futex code, is not set. This causes to retrieve the
current node and with multiple nodes it fails on one of the iterations.

Use numa_set_mempolicy_home_node() to set the expected node.
Use ksft_exit_fail_msg() to fail and exit in order not to confuse ktap.

Fixes: 3163369407 ("selftests/futex: Add futex_numa_mpol")
Suggested-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20250528085521.1938355-3-bigeasy@linutronix.de
This commit is contained in:
Sebastian Andrzej Siewior 2025-05-28 10:55:20 +02:00 committed by Peter Zijlstra
parent 1a9dcf69c7
commit 0ecb4232fc
1 changed files with 6 additions and 2 deletions
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6
tools/testing/selftests/futex/functional/futex_numa_mpol.c
View File

@ -210,6 +210,10 @@ int main(int argc, char *argv[])
ret = mbind(futex_ptr, mem_size, MPOL_BIND, &nodemask,
sizeof(nodemask) * 8, 0);
if (ret == 0) {
ret = numa_set_mempolicy_home_node(futex_ptr, mem_size, i, 0);
if (ret != 0)
ksft_exit_fail_msg("Failed to set home node: %m, %d\n", errno);
ksft_print_msg("Node %d test\n", i);
futex_numa->futex = 0;
futex_numa->numa = FUTEX_NO_NODE;
@ -220,7 +224,7 @@ int main(int argc, char *argv[])
if (0)
test_futex_mpol(futex_numa, 0);
if (futex_numa->numa != i) {
ksft_test_result_fail("Returned NUMA node is %d expected %d\n",
ksft_exit_fail_msg("Returned NUMA node is %d expected %d\n",
futex_numa->numa, i);
}
}