taglinefilesource code
read_ahead98fs/block_dev.cblocks += read_ahead[MAJOR(dev)] / (BLOCK_SIZE >> 9);
read_ahead105fs/ext/file.cblocks += read_ahead[MAJOR(inode->i_dev)] / (BLOCK_SIZE >> 9);
read_ahead145fs/isofs/file.cra_blocks = read_ahead[MAJOR(inode->i_dev)] / (BLOCK_SIZE >> 9);
read_ahead99fs/minix/file.cblocks += read_ahead[MAJOR(inode->i_dev)] / (BLOCK_SIZE >> 9);
read_ahead335include/linux/fs.hextern int read_ahead[];
read_ahead678kernel/blk_drv/hd.cread_ahead[MAJOR_NR] = 8;    /* 8 sector (4kB) read-ahead */
read_ahead34kernel/blk_drv/ll_rw_blk.cint read_ahead[NR_BLK_DEV] = {0, };
read_ahead788kernel/blk_drv/scsi/sd.cread_ahead[MAJOR_NR] = 16;  /* 16 sector read-ahead */
read_ahead790kernel/blk_drv/scsi/sd.cread_ahead[MAJOR_NR] = 4;  /* 4 sector read-ahead */
read_ahead627kernel/blk_drv/scsi/sr.cread_ahead[MAJOR_NR] = 16;  /* 16 sector read-ahead */
read_ahead629kernel/blk_drv/scsi/sr.cread_ahead[MAJOR_NR] = 4;  /* 4 sector read-ahead */