Index: linux-stage/fs/ext4/super.c
When ldiskfs run in failover mode whith read-only disk.
Part of allocation updates are lost and ldiskfs may fail
while mounting this is due to inconsistent state of
group-descriptor. Group-descriptor check is added after
journal replay.
===================================================================
--- linux-stage/fs/ext4/super.c	2016-11-24 20:50:46.736527130 +0530
+++ linux-stage.orig/fs/ext4/super.c	2016-11-24 20:54:14.941779453 +0530
@@ -3429,10 +3429,6 @@
			goto failed_mount2;
		}
	}
-	if (!ext4_check_descriptors(sb, &first_not_zeroed)) {
-		ext4_msg(sb, KERN_ERR, "group descriptors corrupted!");
-		goto failed_mount2;
-	}
	if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG))
		if (!ext4_fill_flex_info(sb)) {
			ext4_msg(sb, KERN_ERR,
@@ -3609,6 +3605,10 @@
	sbi->s_journal->j_commit_callback = ext4_journal_commit_callback;

 no_journal:
+	if (!ext4_check_descriptors(sb, &first_not_zeroed)) {
+		ext4_msg(sb, KERN_ERR, "group descriptors corrupted!");
+		goto failed_mount_wq;
+	}
	if (test_opt(sb, NOBH)) {
		if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) {
			ext4_msg(sb, KERN_WARNING, "Ignoring nobh option - "