f2fs: remove non-uptodate folio from the page cache in move_data_block

During data movement, move_data_block acquires file folio without
triggering a file read. Such folio are typically not uptodate, they need
to be removed from the page cache after gc complete. This patch marks
folio with the PG_dropbehind flag and uses folio_end_dropbehind to
remove folio from the page cache.

Signed-off-by: Yunlei He <heyunlei@xiaomi.com>
Signed-off-by: Yongpeng Yang <yangyongpeng@xiaomi.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 58b291d19f068201cb3daca3e7e811a331d2c8dc..d889f7d9a70f1c7c7f5fc5f704dd9ad206fdd429 100644 (file)
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -1453,7 +1453,11 @@ up_out:
 put_out:
        f2fs_put_dnode(&dn);
 out:
-       f2fs_folio_put(folio, true);
+       if (!folio_test_uptodate(folio))
+               __folio_set_dropbehind(folio);
+       folio_unlock(folio);
+       folio_end_dropbehind(folio);
+       folio_put(folio);
        return err;
 }