f2fs: fix to reorder set_page_dirty and wait_on_page_writeback
This patch reorders flow from
- update page
- set_page_dirty
- wait_on_page_writeback
to
- wait_on_page_writeback
- update page
- set_page_dirty
The reason is:
- set_page_dirty will increase reference of dirty page, the reference
should be cleared before wait_on_page_writeback to keep its consistency.
- some devices need stable page during page writebacking, so we
should not change page's data.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 204d31e..e2e971e 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -387,8 +387,9 @@ static int __f2fs_commit_inmem_pages(struct inode *inode)
if (page->mapping == inode->i_mapping) {
trace_f2fs_commit_inmem_page(page, INMEM);
- set_page_dirty(page);
f2fs_wait_on_page_writeback(page, DATA, true);
+
+ set_page_dirty(page);
if (clear_page_dirty_for_io(page)) {
inode_dec_dirty_pages(inode);
f2fs_remove_dirty_inode(inode);