f2fs: drop obsolete node page when it is truncated

If a node page is trucated, we'd better drop the page in the node_inode's page
cache for better memory footprint.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index bbfc655493dc..b0649b76eb4f 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -518,6 +518,10 @@ invalidate:
         F2FS_SET_SB_DIRT(sbi);
 
         f2fs_put_page(dn->node_page, 1);
+
+        invalidate_mapping_pages(NODE_MAPPING(sbi),
+                        dn->node_page->index, dn->node_page->index);
+
         dn->node_page = NULL;
         trace_f2fs_truncate_node(dn->inode, dn->nid, ni.blk_addr);
 }