EXT4_DEF_INODE_READAHEAD_BLKS 777 fs/ext4/super.c if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) EXT4_DEF_INODE_READAHEAD_BLKS 1955 fs/ext4/super.c sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS;