e.g. shrink reqeust is less than 512, the logic will skip huge pool
Change-Id: Id8bd4d1ecff9f3ab14355e2dbd1c59b9fe824e01
Signed-off-by: Roger He <Hongbo.He@xxxxxxx>
---
drivers/gpu/drm/ttm/ttm_page_alloc.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
index 25b0fa5..1543532 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -442,17 +442,19 @@ ttm_pool_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
/* select start pool in round robin fashion */
for (i = 0; i < NUM_POOLS; ++i) {
unsigned nr_free = shrink_pages;
+ unsigned page_nr;
+
if (shrink_pages == 0)
break;
pool = &_manager->pools[(i + pool_offset)%NUM_POOLS];
+ page_nr = (1 << pool->order);
/* OK to use static buffer since global mutex is held. */
- nr_free_pool = (nr_free >> pool->order);
- if (nr_free_pool == 0)
- continue;
-
+ nr_free_pool = roundup(nr_free, page_nr) >> pool->order;
shrink_pages = ttm_page_pool_free(pool, nr_free_pool, true);
- freed += ((nr_free_pool - shrink_pages) << pool->order);
+ freed += (nr_free_pool - shrink_pages) << pool->order;
+ if (freed >= sc->nr_to_scan)
+ break;
}
mutex_unlock(&lock);
return freed;
--
2.7.4
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