Btrfs: set default max_inline to 8KiB instead of 8MiB

8MiB is way too large and likely set by mistake. This is not
a significant issue as in practice the max amount of data
added to an inline extent is also limited by the page cache
and btree leaf sizes.

Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: David Sterba <dsterba@suse.cz>

3 files changed, 3 insertions, 2 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 089f6da09411..dd79ba7ee3ea 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2089,6 +2089,7 @@ struct btrfs_ioctl_defrag_range_args {
 #define BTRFS_MOUNT_CHANGE_INODE_CACHE  (1 << 24)
 
 #define BTRFS_DEFAULT_COMMIT_INTERVAL   (30)
+#define BTRFS_DEFAULT_MAX_INLINE        (8192)
 
 #define btrfs_clear_opt(o, opt)         ((o) &= ~BTRFS_MOUNT_##opt)
 #define btrfs_set_opt(o, opt)           ((o) |= BTRFS_MOUNT_##opt)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 4780e6623c7b..9b2a741370b7 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2260,7 +2260,7 @@ int open_ctree(struct super_block *sb,
         atomic_set(&fs_info->qgroup_op_seq, 0);
         atomic64_set(&fs_info->tree_mod_seq, 0);
         fs_info->sb = sb;
-        fs_info->max_inline = 8192 * 1024;
+        fs_info->max_inline = BTRFS_DEFAULT_MAX_INLINE;
         fs_info->metadata_ratio = 0;
         fs_info->defrag_inodes = RB_ROOT;
         fs_info->free_chunk_space = 0;
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 1c6da8e00c1b..b1d2a42f379d 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1014,7 +1014,7 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
                 seq_puts(seq, ",nodatacow");
         if (btrfs_test_opt(root, NOBARRIER))
                 seq_puts(seq, ",nobarrier");
-        if (info->max_inline != 8192 * 1024)
+        if (info->max_inline != BTRFS_DEFAULT_MAX_INLINE)
                 seq_printf(seq, ",max_inline=%llu", info->max_inline);
         if (info->alloc_start != 0)
                 seq_printf(seq, ",alloc_start=%llu", info->alloc_start);