After mkfs without journal:
# mkfs.ext4 -O ^has_journal /dev/sda
# mount -t ext4 /dev/sda /test
the /proc/mounts will show:
"/dev/sda /test ext4 rw,relatime,user_xattr,acl,barrier=1,data=writeback 0 0"
which usually make users think the fs is using writeback-mode.
Signed-off-by: Robin Dong <sanbai@xxxxxxxxxx>
---
fs/ext4/super.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 8553dfb..4ea1e85 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3474,7 +3474,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
goto failed_mount_wq;
} else {
clear_opt(sb, DATA_FLAGS);
- set_opt(sb, WRITEBACK_DATA);
+ if (EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL))
+ set_opt(sb, WRITEBACK_DATA);
sbi->s_journal = NULL;
needs_recovery = 0;
goto no_journal;
--
1.7.1
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