From: Chao Yu <yuchao0@huawei.com>
Date: Sat, 26 May 2018 10:03:34 +0000 (+0800)
Subject: f2fs: fix to don't trigger writeback during recovery
X-Git-Tag: v4.9.117~112
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b7ea2b8616d950bbbebb1d28239d7ab9eee4fe1b;p=platform%2Fkernel%2Flinux-amlogic.git

f2fs: fix to don't trigger writeback during recovery

[ Upstream commit 64c74a7ab505ea40d1b3e5d02735ecab08ae1b14 ]

- f2fs_fill_super
 - recover_fsync_data
  - recover_data
   - del_fsync_inode
    - iput
     - iput_final
      - write_inode_now
       - f2fs_write_inode
        - f2fs_balance_fs
         - f2fs_balance_fs_bg
          - sync_dirty_inodes

With data_flush mount option, during recovery, in order to avoid entering
above writeback flow, let's detect recovery status and do skip in
f2fs_balance_fs_bg.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index e10f61684ea4..393039fdb26d 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -369,6 +369,9 @@ void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need)
 
 void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
 {
+	if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
+		return;
+
 	/* try to shrink extent cache when there is no enough memory */
 	if (!available_free_memory(sbi, EXTENT_CACHE))
 		f2fs_shrink_extent_tree(sbi, EXTENT_CACHE_SHRINK_NUMBER);