f2fs: cover number of dirty node pages under node_write lock
This number is referenced by checkpoint under node_write lock.
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 27d1a74..4d9bedf 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1323,23 +1323,24 @@
nid = nid_of_node(page);
f2fs_bug_on(sbi, page->index != nid);
+ if (wbc->for_reclaim) {
+ if (!down_read_trylock(&sbi->node_write))
+ goto redirty_out;
+ } else {
+ down_read(&sbi->node_write);
+ }
+
get_node_info(sbi, nid, &ni);
/* This page is already truncated */
if (unlikely(ni.blk_addr == NULL_ADDR)) {
ClearPageUptodate(page);
dec_page_count(sbi, F2FS_DIRTY_NODES);
+ up_read(&sbi->node_write);
unlock_page(page);
return 0;
}
- if (wbc->for_reclaim) {
- if (!down_read_trylock(&sbi->node_write))
- goto redirty_out;
- } else {
- down_read(&sbi->node_write);
- }
-
set_page_writeback(page);
fio.blk_addr = ni.blk_addr;
write_node_page(nid, &fio);