commit 7441ccef339f87abc27afc4ccfc24c014d7360c9
author Jaegeuk Kim <jaegeuk@kernel.org> Mon Dec 21 19:20:15 2015 -0800
committer Jaegeuk Kim <jaegeuk@kernel.org> Tue Dec 22 10:31:41 2015 -0800
tree 6f1abef9d8a0841a14f12d78d577dd988304513f
parent 4cf185379b7504d640c9dd72f959f081b25f6ea2

f2fs: use atomic variable for total_extent_tree

It would be better to use atomic variable for total_extent_tree.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/node.c

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index d842b19..6cc8ac7 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -65,7 +65,8 @@
 				sizeof(struct ino_entry)) >> PAGE_CACHE_SHIFT;
 		res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1);
 	} else if (type == EXTENT_CACHE) {
-		mem_size = (sbi->total_ext_tree * sizeof(struct extent_tree) +
+		mem_size = (atomic_read(&sbi->total_ext_tree) *
+				sizeof(struct extent_tree) +
 				atomic_read(&sbi->total_ext_node) *
 				sizeof(struct extent_node)) >> PAGE_CACHE_SHIFT;
 		res = mem_size < ((avail_ram * nm_i->ram_thresh / 100) >> 1);