From bf39c00a9a7f3cdb5ce7d6695d9f044daf8f0b53 Mon Sep 17 00:00:00 2001
From: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Date: Wed, 22 Jan 2014 20:41:57 +0900
Subject: [PATCH] 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>
---
 fs/f2fs/node.c | 4 ++++
 1 file changed, 4 insertions(+)

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);
 }