deadline-iosched.c File Reference

#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>

Go to the source code of this file.

Data Structures
struct	deadline_data

Macros
#define	SHOW_FUNCTION(__FUNC, __VAR, __CONV)
#define	STORE_FUNCTION(__FUNC, __PTR, MIN, MAX, __CONV)
#define	DD_ATTR(name)

Functions
	SHOW_FUNCTION (deadline_read_expire_show, dd->fifo_expire[READ], 1)
	SHOW_FUNCTION (deadline_write_expire_show, dd->fifo_expire[WRITE], 1)
	SHOW_FUNCTION (deadline_writes_starved_show, dd->writes_starved, 0)
	SHOW_FUNCTION (deadline_front_merges_show, dd->front_merges, 0)
	SHOW_FUNCTION (deadline_fifo_batch_show, dd->fifo_batch, 0)
	STORE_FUNCTION (deadline_read_expire_store,&dd->fifo_expire[READ], 0, INT_MAX, 1)
	STORE_FUNCTION (deadline_write_expire_store,&dd->fifo_expire[WRITE], 0, INT_MAX, 1)
	STORE_FUNCTION (deadline_writes_starved_store,&dd->writes_starved, INT_MIN, INT_MAX, 0)
	STORE_FUNCTION (deadline_front_merges_store,&dd->front_merges, 0, 1, 0)
	STORE_FUNCTION (deadline_fifo_batch_store,&dd->fifo_batch, 0, INT_MAX, 0)
	module_init (deadline_init)
	module_exit (deadline_exit)
	MODULE_AUTHOR ("Jens Axboe")
	MODULE_LICENSE ("GPL")
	MODULE_DESCRIPTION ("deadline IO scheduler")

Macro Definition Documentation

#define DD_ATTR

(

name

)

Value:

__ATTR(name, S_IRUGO|S_IWUSR, deadline_##name##_show, \
                      deadline_##name##_store)

Definition at line 420 of file deadline-iosched.c.

#define SHOW_FUNCTION	(		__FUNC,
			__VAR,
			__CONV
	)

Value:

static ssize_t __FUNC(struct elevator_queue *e, char *page)     \
{                                   \
	struct deadline_data *dd = e->elevator_data;           \
    int __data = __VAR;                     \
    if (__CONV)                         \
        __data = jiffies_to_msecs(__data);          \
    return deadline_var_show(__data, (page));           \
}

Definition at line 381 of file deadline-iosched.c.

#define STORE_FUNCTION	(		__FUNC,
			__PTR,
			MIN,
			MAX,
			__CONV
	)

Value:

static ssize_t __FUNC(struct elevator_queue *e, const char *page, size_t count) \
{                                   \
	struct deadline_data *dd = e->elevator_data;           \
    int __data;                         \
    int ret = deadline_var_store(&__data, (page), count);       \
    if (__data < (MIN))                     \
        __data = (MIN);                     \
    else if (__data > (MAX))                    \
        __data = (MAX);                     \
    if (__CONV)                         \
        *(__PTR) = msecs_to_jiffies(__data);            \
    else                                \
        *(__PTR) = __data;                  \
    return ret;                         \
}

Definition at line 397 of file deadline-iosched.c.

Function Documentation

MODULE_AUTHOR

(

"Jens Axboe"

)

MODULE_DESCRIPTION

(

"deadline IO scheduler"

)

module_exit

(

deadline_exit

)

module_init

(

deadline_init

)

MODULE_LICENSE

(

"GPL"

)

SHOW_FUNCTION	(	deadline_read_expire_show	,
		dd->	fifo_expire[READ],
		1
	)

SHOW_FUNCTION	(	deadline_write_expire_show	,
		dd->	fifo_expire[WRITE],
		1
	)

SHOW_FUNCTION	(	deadline_writes_starved_show	,
		dd->	writes_starved,
		0
	)

SHOW_FUNCTION	(	deadline_front_merges_show	,
		dd->	front_merges,
		0
	)

SHOW_FUNCTION	(	deadline_fifo_batch_show	,
		dd->	fifo_batch,
		0
	)

STORE_FUNCTION	(	deadline_read_expire_store	,
		&dd->	fifo_expire[READ],
		0	,
		INT_MAX	,
		1
	)

STORE_FUNCTION	(	deadline_write_expire_store	,
		&dd->	fifo_expire[WRITE],
		0	,
		INT_MAX	,
		1
	)

STORE_FUNCTION	(	deadline_writes_starved_store	,
		&dd->	writes_starved,
		INT_MIN	,
		INT_MAX	,
		0
	)

STORE_FUNCTION	(	deadline_front_merges_store	,
		&dd->	front_merges,
		0	,
		1	,
		0
	)

STORE_FUNCTION	(	deadline_fifo_batch_store	,
		&dd->	fifo_batch,
		0	,
		INT_MAX	,
		0
	)