diff options
| -rw-r--r-- | mm/vmscan.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index f5b5f029288c..5be8107e7758 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -286,6 +286,11 @@ static inline int page_mapping_inuse(struct page *page) static inline int is_page_cache_freeable(struct page *page) { + /* + * A freeable page cache page is referenced only by the caller + * that isolated the page, the page cache radix tree and + * optional buffer heads at page->private. + */ return page_count(page) - page_has_private(page) == 2; } |