gem_tiled_swapping: Purge all page/swap caches first

Reset the system to a vanilla state before we query how much RAM/swap
space is available for our testing.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/igt_aux.h b/lib/igt_aux.h
index 948101d2..aa8a3878 100644
--- a/lib/igt_aux.h
+++ b/lib/igt_aux.h
@@ -61,6 +61,7 @@ void igt_wait_for_keypress(void);
 
 /* These are separate to allow easier testing when porting, see the comment at
  * the bottom of intel_os.c. */
+void intel_purge_vm_caches(void);
 uint64_t intel_get_avail_ram_mb(void);
 uint64_t intel_get_total_ram_mb(void);
 uint64_t intel_get_total_swap_mb(void);