diff options
| author | Gioh Kim <gioh.kim@lge.com> | 2015-07-06 15:14:40 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-07-14 22:47:30 -0700 |
| commit | b44d9ce3b81715311198f0c5fa329e518b4f9f18 (patch) | |
| tree | a56a44c4c88b754dd66f067d2465ce6d49da116f /drivers/staging/android/ion/ion_page_pool.c | |
| parent | 3e3148c51190d680b7cc2ebdc556e6ea27a93989 (diff) | |
staging: ion: shrink page-pool by page unit
This patch shrink page-pool by page unit.
The system shrinker calls ion_heap_shrink_count() to get nr_to_scan,
and pass it to ion_heap_shrink_scan().
The problem is the return value of ion_heap_shrink_count() is the number
of pages but ion_system_heap_shrink(), which is called by
ion_heap_shrink_scan(), gets the number of chunk.
The main root of this is that ion_page_pool_shrink() returns page count
via ion_page_pool_total() if it have to check pool size. But it frees
chunks of pages if it have to free pools.
This patch first fix ion_page_pool_shrink() to count only pages,
not chunks. And then ion_system_heap_shrink() to work on pages.
Signed-off-by: Gioh Kim <gioh.kim@lge.com>
Reviewed-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/android/ion/ion_page_pool.c')
| -rw-r--r-- | drivers/staging/android/ion/ion_page_pool.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/staging/android/ion/ion_page_pool.c b/drivers/staging/android/ion/ion_page_pool.c index 4b88f11e52d3..19ad3aba499a 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; |