f2fs: skip searching non-exist range in truncate_hole

Let's skip entire non-exist area to speed up truncate_hole by
using get_next_page_offset.

Signed-off-by: Weichao Guo <guoweichao@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 8fe95f8b16b123f0716a529ec310875cf4f548c3..56232a72d2a399f4efd0befe0fc96fea8dee1e08 100644 (file)
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -857,7 +857,7 @@ int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
                err = get_dnode_of_data(&dn, pg_start, LOOKUP_NODE);
                if (err) {
                        if (err == -ENOENT) {
-                               pg_start++;
+                               pg_start = get_next_page_offset(&dn, pg_start);
                                continue;
                        }
                        return err;