That got lost when we moved back to a static limit.
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
---
drivers/gpu/drm/ttm/ttm_tt.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index 7d479095dcf8..4d8498a3d642 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -389,6 +389,21 @@ void ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm)
ttm->page_flags &= ~TTM_PAGE_FLAG_PRIV_POPULATED;
}
+#ifdef CONFIG_DEBUG_FS
+
+/* Test the shrinker functions and dump the result */
+static int ttm_tt_debugfs_shrink_show(struct seq_file *m, void *data)
+{
+ struct ttm_operation_ctx ctx = { false, false };
+
+ seq_printf(m, "%d\n", ttm_global_swapout(&ctx, GFP_KERNEL));
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(ttm_tt_debugfs_shrink);
+
+#endif
+
+
/**
* ttm_tt_mgr_init - register with the MM shrinker
*
@@ -396,6 +411,11 @@ void ttm_tt_unpopulate(struct ttm_device *bdev, struct ttm_tt *ttm)
*/
void ttm_tt_mgr_init(unsigned long num_pages, unsigned long num_dma32_pages)
{
+#ifdef CONFIG_DEBUG_FS
+ debugfs_create_file("tt_shrink", 0400, ttm_debugfs_root, NULL,
+ &ttm_tt_debugfs_shrink_fops);
+#endif
+
if (!ttm_pages_limit)
ttm_pages_limit = num_pages;
--
2.25.1
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