This patch shrink page-pool by page unit.
Signed-off-by: Gioh Kim <gioh.kim@xxxxxxx>
---
drivers/staging/android/ion/ion_page_pool.c | 5 +++--
drivers/staging/android/ion/ion_system_heap.c | 7 +++++--
2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/android/ion/ion_page_pool.c b/drivers/staging/android/ion/ion_page_pool.c
index 5864f3d..165152f 100644
--- a/drivers/staging/android/ion/ion_page_pool.c
+++ b/drivers/staging/android/ion/ion_page_pool.c
@@ -116,7 +116,7 @@ static int ion_page_pool_total(struct ion_page_pool *pool, bool high)
int ion_page_pool_shrink(struct ion_page_pool *pool, gfp_t gfp_mask,
int nr_to_scan)
{
- int freed;
+ int freed = 0;
bool high;
if (current_is_kswapd())
@@ -127,7 +127,7 @@ int ion_page_pool_shrink(struct ion_page_pool *pool, gfp_t gfp_mask,
if (nr_to_scan == 0)
return ion_page_pool_total(pool, high);
- for (freed = 0; freed < nr_to_scan; freed++) {
+ while (freed <= nr_to_scan) {
struct page *page;
mutex_lock(&pool->mutex);
@@ -141,6 +141,7 @@ int ion_page_pool_shrink(struct ion_page_pool *pool, gfp_t gfp_mask,
}
mutex_unlock(&pool->mutex);
ion_page_pool_free_pages(pool, page);
+ freed += (1 << pool->order);
}
return freed;
diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c
index da2a63c..36e73c3 100644
--- a/drivers/staging/android/ion/ion_system_heap.c
+++ b/drivers/staging/android/ion/ion_system_heap.c
@@ -211,7 +211,7 @@ static int ion_system_heap_shrink(struct ion_heap *heap, gfp_t gfp_mask,
int nr_to_scan)
{
struct ion_system_heap *sys_heap;
- int nr_total = 0;
+ int nr_total = 0, nr_freed;
int i;
sys_heap = container_of(heap, struct ion_system_heap, heap);
@@ -219,7 +219,10 @@ static int ion_system_heap_shrink(struct ion_heap *heap, gfp_t gfp_mask,
for (i = 0; i < num_orders; i++) {
struct ion_page_pool *pool = sys_heap->pools[i];
- nr_total += ion_page_pool_shrink(pool, gfp_mask, nr_to_scan);
+ nr_freed += ion_page_pool_shrink(pool, gfp_mask, nr_to_scan);
+ nr_total += nr_freed;
+ /* nr_to_scan can be negative */
+ nr_to_scan -= nr_freed;
}
return nr_total;
--
1.7.9.5
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