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Subject[PATCH 42/49] ext4: Enable the multiblock allocator by default
Date
From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

Enable the multiblock allocator by default.

Fix ext4_show_options() so if it is not enabled, the nomballoc option
included in /proc/mounts.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---
fs/ext4/super.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 136d095..91a11ec 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -736,6 +736,8 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs)
seq_puts(seq, ",nobh");
if (!test_opt(sb, EXTENTS))
seq_puts(seq, ",noextents");
+ if (!test_opt(sb, MBALLOC))
+ seq_puts(seq, ",nomballoc");
if (test_opt(sb, I_VERSION))
seq_puts(seq, ",i_version");

@@ -1902,6 +1904,11 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
* User -o noextents to turn it off
*/
set_opt(sbi->s_mount_opt, EXTENTS);
+ /*
+ * turn on mballoc feature by default in ext4 filesystem
+ * User -o nomballoc to turn it off
+ */
+ set_opt(sbi->s_mount_opt, MBALLOC);

if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum,
NULL, 0))
--
1.5.4.rc3.31.g1271-dirty


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