From 17c19120eb7fa94d95013243a8cced8cc9e107e1 Mon Sep 17 00:00:00 2001
From: Jaegeuk Kim <jaegeuk@kernel.org>
Date: Fri, 29 Jan 2016 08:57:59 -0800
Subject: [PATCH] f2fs: flush bios to handle cp_error in put_super
Sometimes, if cp_error is set, there remains under-writeback pages, resulting in
kernel hang in put_super.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
fs/f2fs/super.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 58d9a5574bb0d..9445a34b8d48c 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -582,6 +582,13 @@ static void f2fs_put_super(struct super_block *sb)
f2fs_leave_shrinker(sbi);
mutex_unlock(&sbi->umount_mutex);
+ /* our cp_error case, we can wait for any writeback page */
+ if (get_pages(sbi, F2FS_WRITEBACK)) {
+ f2fs_submit_merged_bio(sbi, DATA, WRITE);
+ f2fs_submit_merged_bio(sbi, NODE, WRITE);
+ f2fs_submit_merged_bio(sbi, META, WRITE);
+ }
+
iput(sbi->node_inode);
iput(sbi->meta_inode);
--
2.30.2