commit 40bb0058c871c6ddcd4aff9fe2f5224e59aba47b
author Jaegeuk Kim <jaegeuk.kim@samsung.com> Wed Mar 19 10:43:59 2014 +0900
committer Jaegeuk Kim <jaegeuk.kim@samsung.com> Thu Mar 20 22:10:08 2014 +0900
tree e77b844ff325c799afc0760bc0d4d23b788ecb10
parent 3cb5ad152b54430f3e5f338c15f8cd434e7160c8

f2fs: avoid to drop nat entries due to the negative nr_shrink

The try_to_free_nats should not receive the negative nr_shrink.
Otherwise, it can drop all the nat entries by the while loop.

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

fs/f2fs/node.c

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 9a6d8bb..d27e65a 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -208,7 +208,7 @@
 {
 	struct f2fs_nm_info *nm_i = NM_I(sbi);
 
-	if (nm_i->nat_cnt <= NM_WOUT_THRESHOLD)
+	if (nm_i->nat_cnt <= NM_WOUT_THRESHOLD || nr_shrink <= 0)
 		return 0;
 
 	write_lock(&nm_i->nat_tree_lock);