[PATCH] f2fs: fix to redirty page if fail to gc data page

[Chao Yu]

From: Chao Yu <yuch...@huawei.com>

If we fail to move data page during foreground GC, we should give another
chance to writeback that page which was set dirty previously by writer.

Signed-off-by: Chao Yu <yuch...@huawei.com>
---
 fs/f2fs/gc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 38d56f6..ee213a8 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -653,12 +653,15 @@ static void move_data_page(struct inode *inode, block_t 
bidx, int gc_type)
                        .page = page,
                        .encrypted_page = NULL,
                };
+               bool is_dirty = PageDirty(page);
+
                set_page_dirty(page);
                f2fs_wait_on_page_writeback(page, DATA, true);
                if (clear_page_dirty_for_io(page))
                        inode_dec_dirty_pages(inode);
                set_cold_data(page);
-               do_write_data_page(&fio);
+               if (do_write_data_page(&fio) && is_dirty)
+                       set_page_dirty(page);
                clear_cold_data(page);
        }
 out:
-- 
2.7.2