Recently, "Call the filesystem back whenever a page is removed from
the page cache(6072d13c)" added new freepage hook in page cache
drop function.
So, replace_page_cache_page should call freepage to support
page cleanup to fs.
Cc: Miklos Szeredi <mszeredi@xxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Signed-off-by: Minchan Kim <minchan.kim@xxxxxxxxx>
---
mm/filemap.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/mm/filemap.c b/mm/filemap.c
index 3c89c96..a25c898 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -436,7 +436,10 @@ int replace_page_cache_page(struct page *old, struct page *new, gfp_t gfp_mask)
error = radix_tree_preload(gfp_mask & ~__GFP_HIGHMEM);
if (!error) {
struct address_space *mapping = old->mapping;
+ void (*freepage)(struct page *);
+
pgoff_t offset = old->index;
+ freepage = mapping->a_ops->freepage;
page_cache_get(new);
new->mapping = mapping;
@@ -452,6 +455,8 @@ int replace_page_cache_page(struct page *old, struct page *new, gfp_t gfp_mask)
__inc_zone_page_state(new, NR_SHMEM);
spin_unlock_irq(&mapping->tree_lock);
radix_tree_preload_end();
+ if (freepage)
+ freepage(old);
page_cache_release(old);
mem_cgroup_end_migration(memcg, old, new, true);
} else {
--
1.7.1
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