From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Wed, 16 Sep 2015 21:06:54 +0000 (-0700)
Subject: f2fs: check end_io for metapages before making next checkpoint blocks
X-Git-Tag: v4.4-rc1~120^2~43
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=a7230d16d5f8635dbc029af057969e46e3eb2246;p=linux.git

f2fs: check end_io for metapages before making next checkpoint blocks

This patch avoids to produce new checkpoint blocks before the previous meta
pages were written completely.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index c5a38e352a80..ff53405aee39 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -1000,6 +1000,11 @@ static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 
 	start_blk = __start_cp_addr(sbi);
 
+	/* need to wait for end_io results */
+	wait_on_all_pages_writeback(sbi);
+	if (unlikely(f2fs_cp_error(sbi)))
+		return;
+
 	/* write out checkpoint buffer at block 0 */
 	update_meta_page(sbi, ckpt, start_blk++);