taglinefilesource code
read_ahead98fs/block_dev.cblocks += read_ahead[MAJOR(dev)] / (BLOCK_SIZE >> 9);
read_ahead107fs/ext/file.cblocks += read_ahead[MAJOR(inode->i_dev)] / (BLOCK_SIZE >> 9);
read_ahead110fs/ext2/file.cblocks += read_ahead[MAJOR(inode->i_dev)] / (BLOCK_SIZE >> 9);
read_ahead147fs/isofs/file.cra_blocks = read_ahead[MAJOR(inode->i_dev)] / (BLOCK_SIZE >> 9);
read_ahead101fs/minix/file.cblocks += read_ahead[MAJOR(inode->i_dev)] / (BLOCK_SIZE >> 9);
read_ahead100fs/xiafs/file.czones += read_ahead[MAJOR(inode->i_dev)] >> (1+XIAFS_ZSHIFT(inode->i_sb));
read_ahead378include/linux/fs.hextern int read_ahead[];
read_ahead709kernel/blk_drv/hd.cread_ahead[MAJOR_NR] = 8;    /* 8 sector (4kB) read-ahead */
read_ahead34kernel/blk_drv/ll_rw_blk.cint read_ahead[MAX_BLKDEV] = {0, };
read_ahead824kernel/blk_drv/scsi/sd.cread_ahead[MAJOR_NR] = 16;  /* 16 sector read-ahead */
read_ahead826kernel/blk_drv/scsi/sd.cread_ahead[MAJOR_NR] = 4;  /* 4 sector read-ahead */
read_ahead711kernel/blk_drv/scsi/sr.cread_ahead[MAJOR_NR] = 16;  /* 16 sector read-ahead */
read_ahead713kernel/blk_drv/scsi/sr.cread_ahead[MAJOR_NR] = 4;  /* 4 sector read-ahead */
read_ahead89kernel/blk_drv/xd.cread_ahead[MAJOR_NR] = 8;  /* 8 sector (4kB) read ahead */