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Date:	Mon,  7 Jul 2014 13:46:28 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Jaegeuk Kim <jaegeuk@...nel.org>,
	Changman Lee <cm224.lee@...sung.com>
Cc:	linux-f2fs-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, Huang Ying <ying.huang@...el.com>
Subject: f2fs: Add f2fs_balance_fs for direct IO

Otherwise, if a large amount of direct IO writes were done, the
segment allocation may be failed because no enough segments are gced.

Signed-off-by: Huang, Ying <ying.huang@...el.com>
---
 fs/f2fs/data.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1038,6 +1038,7 @@ static ssize_t f2fs_direct_IO(int rw, st
 {
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file->f_mapping->host;
+	struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
 
 	/* Let buffer I/O handle the inline data case. */
 	if (f2fs_has_inline_data(inode))
@@ -1046,8 +1047,11 @@ static ssize_t f2fs_direct_IO(int rw, st
 	if (check_direct_IO(inode, rw, iter, offset))
 		return 0;
 
+	if (rw == WRITE)
+		f2fs_balance_fs(sbi);
+
 	/* clear fsync mark to recover these blocks */
-	fsync_mark_clear(F2FS_SB(inode->i_sb), inode->i_ino);
+	fsync_mark_clear(sbi, inode->i_ino);
 
 	return blockdev_direct_IO(rw, iocb, inode, iter, offset,
 				  get_data_block);
--
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