tests/gem_reset_stats: document the new subtest a bit better

I wanted to add this to Mika's original patch but forgot to git add.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/tests/gem_reset_stats.c b/tests/gem_reset_stats.c
index 095b14b..176e1c8 100644 (file)
--- a/tests/gem_reset_stats.c
+++ b/tests/gem_reset_stats.c
@@ -660,9 +660,14 @@ static void test_close_pending_fork(void)
         */
        pid = fork();
        if (pid == 0) {
-               /* Not first drm_open_any() so we need to do
+               /*
+                * Not first drm_open_any() so we need to do
                 * gem_quiescent_gpu() explicitly, as it is the
                 * key component to trigger the oops
+                *
+                * The crucial component is that we schedule the same noop batch
+                * on each ring. If gem_quiescent_gpu ever changes that we need
+                * to update this testcase.
                 */
                const int fd2 = drm_open_any();
                igt_assert(fd2 >= 0);