This turned out to be the reason one one of my tests was hitting
the list corruption bug - we need a good deal more memory pressure.
So I'll now add a new testcase for that.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Also I've stumbled over igt_fixture again. Somehow gcc loves to wreak
havoc with stack variables set up in igt_fixtures ... Duct-tape in the
form of moving fd out to global scope applied.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>