igt: Exercise the shrinker

Introduce a new fork helper that spawns a process that just repeatedly
calls i915_gem_shrink_all() and watch what happens as we try to use
objects that have been shrunk.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/igt_aux.h b/lib/igt_aux.h
index cb54ca5e..13f6f156 100644
--- a/lib/igt_aux.h
+++ b/lib/igt_aux.h
@@ -51,6 +51,9 @@ extern int num_trash_bos;
 void igt_fork_signal_helper(void);
 void igt_stop_signal_helper(void);
 
+void igt_fork_shrink_helper(void);
+void igt_stop_shrink_helper(void);
+
 void igt_fork_hang_detector(int fd);
 void igt_stop_hang_detector(void);