/*
* Anticipatory & deadline i/o scheduler.
*
* Copyright (C) 2002 Jens Axboe <axboe@suse.de>
* Nick Piggin <nickpiggin@yahoo.com.au>
*
*/
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/blkdev.h>
#include <linux/elevator.h>
#include <linux/bio.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/compiler.h>
#include <linux/rbtree.h>
#include <linux/interrupt.h>
#define REQ_SYNC 1
#define REQ_ASYNC 0
/*
* See Documentation/block/as-iosched.txt
*/
/*
* max time before a read is submitted.
*/
#define default_read_expire (HZ / 8)
/*
* ditto for writes, these limits are not hard, even
* if the disk is capable of satisfying them.
*/
#define default_write_expire (HZ / 4)
