[PATCH v2] f2fs: Add f2fs_balance_fs for direct IO

[Huang Ying <ying.huang@intel.com>]

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

Changes:

v2: add f2fs_balance_fs into __get_data_block instead of f2fs_direct_IO.

Signed-off-by: Huang, Ying <ying.huang@intel.com>
---
 fs/f2fs/data.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -626,8 +626,10 @@ static int __get_data_block(struct inode
 	if (check_extent_cache(inode, pgofs, bh_result))
 		goto out;
 
-	if (create)
+	if (create) {
+		f2fs_balance_fs(sbi);
 		f2fs_lock_op(sbi);
+	}
 
 	/* When reading holes, we need its node page */
 	set_new_dnode(&dn, inode, NULL, NULL, 0);