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drm/ttm: Handle cgroup based eviction in TTM

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cgroup resource allocation has to be handled in TTM, so -EAGAIN from
cgroups can be converted into -ENOSPC, and the limitcg can be properly
evicted in ttm code.

When hitting a resource limit through -EAGAIN, the cgroup for which the
limit is hit is also returned. This allows eviction to delete only from
cgroups which are a subgroup of the current cgroup.

The returned CSS is used to determine if eviction is valuable for a
given resource, and allows TTM to only target specific resources to
lower memory usage.

Co-developed-by: Friedrich Vock <friedrich.vock@gmx.de>
Signed-off-by: Friedrich Vock <friedrich.vock@gmx.de>
Co-developed-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20241204134410.1161769-4-dev@lankhorst.se
Signed-off-by: Maxime Ripard <mripard@kernel.org>
This commit is contained in:
Maarten Lankhorst
2024-12-04 14:44:03 +01:00
committed by Maxime Ripard
parent 7b0af165e2
commit 2b624a2c18
6 changed files with 89 additions and 22 deletions
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18
drivers/gpu/drm/ttm/tests/ttm_bo_test.c
View File

@@ -258,13 +258,13 @@ static void ttm_bo_unreserve_basic(struct kunit *test)
bo = ttm_bo_kunit_init(test, test->priv, BO_SIZE, NULL);
bo->priority = bo_prio;
err = ttm_resource_alloc(bo, place, &res1);
err = ttm_resource_alloc(bo, place, &res1, NULL);
KUNIT_ASSERT_EQ(test, err, 0);
bo->resource = res1;
/* Add a dummy resource to populate LRU */
ttm_resource_alloc(bo, place, &res2);
ttm_resource_alloc(bo, place, &res2, NULL);
dma_resv_lock(bo->base.resv, NULL);
ttm_bo_unreserve(bo);
@@ -300,12 +300,12 @@ static void ttm_bo_unreserve_pinned(struct kunit *test)
dma_resv_lock(bo->base.resv, NULL);
ttm_bo_pin(bo);
err = ttm_resource_alloc(bo, place, &res1);
err = ttm_resource_alloc(bo, place, &res1, NULL);
KUNIT_ASSERT_EQ(test, err, 0);
bo->resource = res1;
/* Add a dummy resource to the pinned list */
err = ttm_resource_alloc(bo, place, &res2);
err = ttm_resource_alloc(bo, place, &res2, NULL);
KUNIT_ASSERT_EQ(test, err, 0);
KUNIT_ASSERT_EQ(test,
list_is_last(&res2->lru.link, &priv->ttm_dev->unevictable), 1);
@@ -355,7 +355,7 @@ static void ttm_bo_unreserve_bulk(struct kunit *test)
ttm_bo_set_bulk_move(bo1, &lru_bulk_move);
dma_resv_unlock(bo1->base.resv);
err = ttm_resource_alloc(bo1, place, &res1);
err = ttm_resource_alloc(bo1, place, &res1, NULL);
KUNIT_ASSERT_EQ(test, err, 0);
bo1->resource = res1;
@@ -363,7 +363,7 @@ static void ttm_bo_unreserve_bulk(struct kunit *test)
ttm_bo_set_bulk_move(bo2, &lru_bulk_move);
dma_resv_unlock(bo2->base.resv);
err = ttm_resource_alloc(bo2, place, &res2);
err = ttm_resource_alloc(bo2, place, &res2, NULL);
KUNIT_ASSERT_EQ(test, err, 0);
bo2->resource = res2;
@@ -401,7 +401,7 @@ static void ttm_bo_put_basic(struct kunit *test)
bo = ttm_bo_kunit_init(test, test->priv, BO_SIZE, NULL);
bo->type = ttm_bo_type_device;
err = ttm_resource_alloc(bo, place, &res);
err = ttm_resource_alloc(bo, place, &res, NULL);
KUNIT_ASSERT_EQ(test, err, 0);
bo->resource = res;
@@ -518,7 +518,7 @@ static void ttm_bo_pin_unpin_resource(struct kunit *test)
bo = ttm_bo_kunit_init(test, test->priv, BO_SIZE, NULL);
err = ttm_resource_alloc(bo, place, &res);
err = ttm_resource_alloc(bo, place, &res, NULL);
KUNIT_ASSERT_EQ(test, err, 0);
bo->resource = res;
@@ -569,7 +569,7 @@ static void ttm_bo_multiple_pin_one_unpin(struct kunit *test)
bo = ttm_bo_kunit_init(test, test->priv, BO_SIZE, NULL);
err = ttm_resource_alloc(bo, place, &res);
err = ttm_resource_alloc(bo, place, &res, NULL);
KUNIT_ASSERT_EQ(test, err, 0);
bo->resource = res;

4
drivers/gpu/drm/ttm/tests/ttm_bo_validate_test.c
View File

@@ -542,7 +542,7 @@ static void ttm_bo_validate_no_placement_signaled(struct kunit *test)
bo->ttm = old_tt;
}
err = ttm_resource_alloc(bo, place, &bo->resource);
err = ttm_resource_alloc(bo, place, &bo->resource, NULL);
KUNIT_EXPECT_EQ(test, err, 0);
KUNIT_ASSERT_EQ(test, man->usage, size);
@@ -603,7 +603,7 @@ static void ttm_bo_validate_no_placement_not_signaled(struct kunit *test)
bo = ttm_bo_kunit_init(test, test->priv, size, NULL);
bo->type = params->bo_type;
err = ttm_resource_alloc(bo, place, &bo->resource);
err = ttm_resource_alloc(bo, place, &bo->resource, NULL);
KUNIT_EXPECT_EQ(test, err, 0);
placement = kunit_kzalloc(test, sizeof(*placement), GFP_KERNEL);

2
drivers/gpu/drm/ttm/tests/ttm_resource_test.c
View File

@@ -302,7 +302,7 @@ static void ttm_sys_man_free_basic(struct kunit *test)
res = kunit_kzalloc(test, sizeof(*res), GFP_KERNEL);
KUNIT_ASSERT_NOT_NULL(test, res);
ttm_resource_alloc(bo, place, &res);
ttm_resource_alloc(bo, place, &res, NULL);
man = ttm_manager_type(priv->devs->ttm_dev, mem_type);
man->func->free(man, res);