tests/gem_mmap: Add short mmap test

Blows up with the current full-object prefault code.

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

1 files changed, 7 insertions, 0 deletions

diff --git a/tests/gem_mmap.c b/tests/gem_mmap.c
index 46ef3ece..334bd760 100644
--- a/tests/gem_mmap.c
+++ b/tests/gem_mmap.c
@@ -92,6 +92,13 @@ igt_main
 		munmap(addr, OBJECT_SIZE);
 	}
 
+	igt_subtest("short-mmap") {
+		igt_assert(OBJECT_SIZE > 4096);
+		addr = gem_mmap__cpu(fd, handle, 4096, PROT_WRITE);
+		memset(addr, 0, 4096);
+		munmap(addr, 4096);
+	}
+
 	igt_fixture
 		close(fd);
 }