blk-throttle.c File Reference

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/blkdev.h>
#include <linux/bio.h>
#include <linux/blktrace_api.h>
#include "blk-cgroup.h"
#include "blk.h"

Go to the source code of this file.

Data Structures
struct	throtl_rb_root
struct	tg_stats_cpu
struct	throtl_grp
struct	throtl_data

Macros
#define	THROTL_RB_ROOT
#define	rb_entry_tg(node)   rb_entry((node), struct throtl_grp, rb_node)
#define	THROTL_TG_FNS(name)
#define	throtl_log_tg(td, tg, fmt, args...)
#define	throtl_log(td, fmt, args...)   blk_add_trace_msg((td)->queue, "throtl " fmt, ##args)

Enumerations
enum	tg_state_flags { THROTL_TG_FLAG_on_rr = 0 }

Functions
	THROTL_TG_FNS (on_rr)
void	blk_throtl_work (struct work_struct *work)
bool	blk_throtl_bio (struct request_queue *q, struct bio *bio)
void	blk_throtl_drain (struct request_queue *q) __releases(q-> queue_lock) __acquires(q->queue_lock)
int	blk_throtl_init (struct request_queue *q)
void	blk_throtl_exit (struct request_queue *q)
	module_init (throtl_init)

Macro Definition Documentation

#define rb_entry_tg

(

node

)

rb_entry((node), struct throtl_grp, rb_node)

Definition at line 41 of file blk-throttle.c.

#define throtl_log	(		td,
			fmt,
			args...
	)		blk_add_trace_msg((td)->queue, "throtl " fmt, ##args)

Definition at line 173 of file blk-throttle.c.

#define throtl_log_tg	(		td,
			tg,
			fmt,
			args...
	)

Value:

do {            \
    char __pbuf[128];                       \
                                    \
    blkg_path(tg_to_blkg(tg), __pbuf, sizeof(__pbuf));      \
    blk_add_trace_msg((td)->queue, "throtl %s " fmt, __pbuf, ##args); \
} while (0)

Definition at line 166 of file blk-throttle.c.

#define THROTL_RB_ROOT

Value:

(struct throtl_rb_root) { .rb = RB_ROOT, .left = NULL, \
            .count = 0, .min_disptime = 0}

Definition at line 38 of file blk-throttle.c.

#define THROTL_TG_FNS

(

name

)

Value:

static inline void throtl_mark_tg_##name(struct throtl_grp *tg)     \
{                                   \
    (tg)->flags |= (1 << THROTL_TG_FLAG_##name);            \
}                                   \
static inline void throtl_clear_tg_##name(struct throtl_grp *tg)    \
{                                   \
    (tg)->flags &= ~(1 << THROTL_TG_FLAG_##name);           \
}                                   \
static inline int throtl_tg_##name(const struct throtl_grp *tg)     \
{                                   \
    return ((tg)->flags & (1 << THROTL_TG_FLAG_##name)) != 0;   \
}

Definition at line 150 of file blk-throttle.c.

Enumeration Type Documentation

enum tg_state_flags

Enumerator:

THROTL_TG_FLAG_on_rr

Definition at line 146 of file blk-throttle.c.

Function Documentation

bool blk_throtl_bio	(	struct request_queue *	q,
		struct bio *	bio
	)

Definition at line 1107 of file blk-throttle.c.

void blk_throtl_drain

(

struct request_queue *

q

)

-> queue_lock) __acquires(q->queue_lock)

blk_throtl_drain - drain throttled bios : request_queue to drain throttled bios for

Dispatch all currently throttled bios on through ->make_request_fn().

Definition at line 1205 of file blk-throttle.c.

void blk_throtl_exit

(

struct request_queue *

q

)

Definition at line 1257 of file blk-throttle.c.

int blk_throtl_init

(

struct request_queue *

q

)

Definition at line 1234 of file blk-throttle.c.

void blk_throtl_work

(

struct work_struct *

work

)

Definition at line 914 of file blk-throttle.c.

module_init

(

throtl_init

)

THROTL_TG_FNS

(

on_rr

)