From e897d8d2c12f90025130a011561d2ee0155831d7 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Tue, 7 Aug 2018 16:40:55 +0100 Subject: igt/prime_vgem: Ask the shrinker to purge a vgem bo from inside i915 Link a vgem dmabuf into an i915 bo and then ask the i915 shrinker to purge/invalidate its pages. This should establish the lockdep link from the fs_reclaim shrinker section to whatever locks are used to acquire/release dmabuf mappings; if any are required ofc. Signed-off-by: Chris Wilson Cc: Tvrtko Ursulin Cc: Daniel Vetter Reviewed-by: Tvrtko Ursulin --- tests/prime_vgem.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) (limited to 'tests/prime_vgem.c') diff --git a/tests/prime_vgem.c b/tests/prime_vgem.c index d886044a..b821fbb8 100644 --- a/tests/prime_vgem.c +++ b/tests/prime_vgem.c @@ -237,6 +237,32 @@ static void test_gtt(int vgem, int i915) gem_close(vgem, scratch.handle); } +static void test_shrink(int vgem, int i915) +{ + struct vgem_bo scratch = { + .width = 1024, + .height = 1024, + .bpp = 32 + }; + int dmabuf; + + vgem_create(vgem, &scratch); + + dmabuf = prime_handle_to_fd(vgem, scratch.handle); + gem_close(vgem, scratch.handle); + + scratch.handle = prime_fd_to_handle(i915, dmabuf); + close(dmabuf); + + /* Populate the i915_bo->pages. */ + gem_set_domain(i915, scratch.handle, I915_GEM_DOMAIN_GTT, 0); + + /* Now evict them, establishing the link from i915:shrinker to vgem. */ + igt_drop_caches_set(i915, DROP_SHRINK_ALL); + + gem_close(i915, scratch.handle); +} + static bool is_coherent(int i915) { int val = 1; /* by default, we assume GTT is coherent, hence the test */ @@ -794,6 +820,9 @@ igt_main igt_subtest("basic-gtt") test_gtt(vgem, i915); + igt_subtest("shrink") + test_shrink(vgem, i915); + igt_subtest("coherency-gtt") test_gtt_interleaved(vgem, i915); -- cgit v1.2.3