[PATCH v4 05/12] selftests/mm: Print some details when uffd-stress gets bad params

[Brendan Jackman]

So this can be debugged more easily.

Signed-off-by: Brendan Jackman <jackm...@google.com>
---
 tools/testing/selftests/mm/uffd-stress.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/mm/uffd-stress.c 
b/tools/testing/selftests/mm/uffd-stress.c
index 
d6b57e5a2e1d7611aa1588ee41601ce16117a574..4ba5bf13a0108435ce8b53340b9e17ccd47e859e
 100644
--- a/tools/testing/selftests/mm/uffd-stress.c
+++ b/tools/testing/selftests/mm/uffd-stress.c
@@ -457,7 +457,8 @@ int main(int argc, char **argv)
 
        nr_pages_per_cpu = bytes / page_size / nr_parallel;
        if (!nr_pages_per_cpu) {
-               _err("invalid MiB");
+               _err("pages_per_cpu = 0, cannot test (%lu / %lu / %lu)",
+                       bytes, page_size, nr_parallel);
                usage();
        }
 

-- 
2.49.0.rc0.332.g42c0ae87b1-goog