#include <linux/module.h>
#include <linux/dma-mapping.h>
+#include <linux/sched/mm.h>
#ifdef CONFIG_X86
#include <asm/set_memory.h>
}
EXPORT_SYMBOL(ttm_pool_fini);
+/* As long as pages are available make sure to release at least one */
+static unsigned long ttm_pool_shrinker_scan(struct shrinker *shrink,
+ struct shrink_control *sc)
+{
+ unsigned long num_freed = 0;
+
+ do
+ num_freed += ttm_pool_shrink();
+ while (!num_freed && atomic_long_read(&allocated_pages));
+
+ return num_freed;
+}
+
+/* Return the number of pages available or SHRINK_EMPTY if we have none */
+static unsigned long ttm_pool_shrinker_count(struct shrinker *shrink,
+ struct shrink_control *sc)
+{
+ unsigned long num_pages = atomic_long_read(&allocated_pages);
+
+ return num_pages ? num_pages : SHRINK_EMPTY;
+}
+
#ifdef CONFIG_DEBUG_FS
/* Count the number of pages available in a pool_type */
static unsigned int ttm_pool_type_count(struct ttm_pool_type *pt)
}
EXPORT_SYMBOL(ttm_pool_debugfs);
-#endif
-
-/* As long as pages are available make sure to release at least one */
-static unsigned long ttm_pool_shrinker_scan(struct shrinker *shrink,
- struct shrink_control *sc)
+/* Test the shrinker functions and dump the result */
+static int ttm_pool_debugfs_shrink_show(struct seq_file *m, void *data)
{
- unsigned long num_freed = 0;
+ struct shrink_control sc = { .gfp_mask = GFP_NOFS };
- do
- num_freed += ttm_pool_shrink();
- while (!num_freed && atomic_long_read(&allocated_pages));
+ fs_reclaim_acquire(GFP_KERNEL);
+ seq_printf(m, "%lu/%lu\n", ttm_pool_shrinker_count(&mm_shrinker, &sc),
+ ttm_pool_shrinker_scan(&mm_shrinker, &sc));
+ fs_reclaim_release(GFP_KERNEL);
- return num_freed;
+ return 0;
}
+DEFINE_SHOW_ATTRIBUTE(ttm_pool_debugfs_shrink);
-/* Return the number of pages available or SHRINK_EMPTY if we have none */
-static unsigned long ttm_pool_shrinker_count(struct shrinker *shrink,
- struct shrink_control *sc)
-{
- unsigned long num_pages = atomic_long_read(&allocated_pages);
-
- return num_pages ? num_pages : SHRINK_EMPTY;
-}
+#endif
/**
* ttm_pool_mgr_init - Initialize globals
#ifdef CONFIG_DEBUG_FS
debugfs_create_file("page_pool", 0444, ttm_debugfs_root, NULL,
&ttm_pool_debugfs_globals_fops);
+ debugfs_create_file("page_pool_shrink", 0400, ttm_debugfs_root, NULL,
+ &ttm_pool_debugfs_shrink_fops);
#endif
mm_shrinker.count_objects = ttm_pool_shrinker_count;