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blk-wbt: move private information from blk-wbt.h to blk-wbt.c 

A large part of blk-wbt.h is only used in blk-wbt.c, so move it there.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230203150400.3199230-11-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2023-02-03 16:03:51 +01:00 committed by Jens Axboe
parent 958f296547
commit 0bc65bd41d
4 changed files with 79 additions and 86 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
block/blk-settings.c
View File

@ -16,6 +16,7 @@
#include <linux/dma-mapping.h>
#include "blk.h"
#include "blk-rq-qos.h"
#include "blk-wbt.h"
void blk_queue_rq_timeout(struct request_queue *q, unsigned int timeout)

1
block/blk-sysfs.c
View File

@ -16,6 +16,7 @@
#include "blk-mq.h"
#include "blk-mq-debugfs.h"
#include "blk-mq-sched.h"
#include "blk-rq-qos.h"
#include "blk-wbt.h"
#include "blk-cgroup.h"
#include "blk-throttle.h"

77
block/blk-wbt.c
View File

@ -25,6 +25,7 @@
#include <linux/backing-dev.h>
#include <linux/swap.h>
#include "blk-stat.h"
#include "blk-wbt.h"
#include "blk-rq-qos.h"
#include "elevator.h"
@ -32,6 +33,72 @@
#define CREATE_TRACE_POINTS
#include <trace/events/wbt.h>
enum wbt_flags {
WBT_TRACKED = 1, /* write, tracked for throttling */
WBT_READ = 2, /* read */
WBT_KSWAPD = 4, /* write, from kswapd */
WBT_DISCARD = 8, /* discard */
WBT_NR_BITS = 4, /* number of bits */
};
enum {
WBT_RWQ_BG = 0,
WBT_RWQ_KSWAPD,
WBT_RWQ_DISCARD,
WBT_NUM_RWQ,
};
/*
* If current state is WBT_STATE_ON/OFF_DEFAULT, it can be covered to any other
* state, if current state is WBT_STATE_ON/OFF_MANUAL, it can only be covered
* to WBT_STATE_OFF/ON_MANUAL.
*/
enum {
WBT_STATE_ON_DEFAULT = 1, /* on by default */
WBT_STATE_ON_MANUAL = 2, /* on manually by sysfs */
WBT_STATE_OFF_DEFAULT = 3, /* off by default */
WBT_STATE_OFF_MANUAL = 4, /* off manually by sysfs */
};
struct rq_wb {
/*
* Settings that govern how we throttle
*/
unsigned int wb_background; /* background writeback */
unsigned int wb_normal; /* normal writeback */
short enable_state; /* WBT_STATE_* */
/*
* Number of consecutive periods where we don't have enough
* information to make a firm scale up/down decision.
*/
unsigned int unknown_cnt;
u64 win_nsec; /* default window size */
u64 cur_win_nsec; /* current window size */
struct blk_stat_callback *cb;
u64 sync_issue;
void *sync_cookie;
unsigned int wc;
unsigned long last_issue; /* last non-throttled issue */
unsigned long last_comp; /* last non-throttled comp */
unsigned long min_lat_nsec;
struct rq_qos rqos;
struct rq_wait rq_wait[WBT_NUM_RWQ];
struct rq_depth rq_depth;
};
static inline struct rq_wb *RQWB(struct rq_qos *rqos)
{
return container_of(rqos, struct rq_wb, rqos);
}
static inline void wbt_clear_state(struct request *rq)
{
rq->wbt_flags = 0;
@ -226,6 +293,16 @@ static u64 rwb_sync_issue_lat(struct rq_wb *rwb)
return now - issue;
}
static inline unsigned int wbt_inflight(struct rq_wb *rwb)
{
unsigned int i, ret = 0;
for (i = 0; i < WBT_NUM_RWQ; i++)
ret += atomic_read(&rwb->rq_wait[i].inflight);
return ret;
}
enum {
LAT_OK = 1,
LAT_UNKNOWN,

86
block/blk-wbt.h
View File

@ -2,92 +2,6 @@
#ifndef WB_THROTTLE_H
#define WB_THROTTLE_H
#include <linux/kernel.h>
#include <linux/atomic.h>
#include <linux/wait.h>
#include <linux/timer.h>
#include <linux/ktime.h>
#include "blk-stat.h"
#include "blk-rq-qos.h"
enum wbt_flags {
WBT_TRACKED = 1, /* write, tracked for throttling */
WBT_READ = 2, /* read */
WBT_KSWAPD = 4, /* write, from kswapd */
WBT_DISCARD = 8, /* discard */
WBT_NR_BITS = 4, /* number of bits */
};
enum {
WBT_RWQ_BG = 0,
WBT_RWQ_KSWAPD,
WBT_RWQ_DISCARD,
WBT_NUM_RWQ,
};
/*
* If current state is WBT_STATE_ON/OFF_DEFAULT, it can be covered to any other
* state, if current state is WBT_STATE_ON/OFF_MANUAL, it can only be covered
* to WBT_STATE_OFF/ON_MANUAL.
*/
enum {
WBT_STATE_ON_DEFAULT = 1, /* on by default */
WBT_STATE_ON_MANUAL = 2, /* on manually by sysfs */
WBT_STATE_OFF_DEFAULT = 3, /* off by default */
WBT_STATE_OFF_MANUAL = 4, /* off manually by sysfs */
};
struct rq_wb {
/*
* Settings that govern how we throttle
*/
unsigned int wb_background; /* background writeback */
unsigned int wb_normal; /* normal writeback */
short enable_state; /* WBT_STATE_* */
/*
* Number of consecutive periods where we don't have enough
* information to make a firm scale up/down decision.
*/
unsigned int unknown_cnt;
u64 win_nsec; /* default window size */
u64 cur_win_nsec; /* current window size */
struct blk_stat_callback *cb;
u64 sync_issue;
void *sync_cookie;
unsigned int wc;
unsigned long last_issue; /* last non-throttled issue */
unsigned long last_comp; /* last non-throttled comp */
unsigned long min_lat_nsec;
struct rq_qos rqos;
struct rq_wait rq_wait[WBT_NUM_RWQ];
struct rq_depth rq_depth;
};
static inline struct rq_wb *RQWB(struct rq_qos *rqos)
{
return container_of(rqos, struct rq_wb, rqos);
}
static inline unsigned int wbt_inflight(struct rq_wb *rwb)
{
unsigned int i, ret = 0;
for (i = 0; i < WBT_NUM_RWQ; i++)
ret += atomic_read(&rwb->rq_wait[i].inflight);
return ret;
}
#ifdef CONFIG_BLK_WBT
int wbt_init(struct gendisk *disk);