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Subject[PATCH 24/36] blkcg: don't use blkg->plid in stat related functions
Date
blkg is scheduled to be unified for all policies and thus there won't
be one-to-one mapping from blkg to policy. Update stat related
functions to take explicit @pol or @plid arguments and not use
blkg->plid.

This is painful for now but most of specific stat interface functions
will be replaced with a handful of generic helpers.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
---
block/blk-cgroup.c | 150 ++++++++++++++++++++++++++++----------------------
block/blk-cgroup.h | 80 +++++++++++++++++----------
block/blk-throttle.c | 4 +-
block/cfq-iosched.c | 44 +++++++++-----
block/cfq.h | 96 +++++++++++++++++++-------------
5 files changed, 224 insertions(+), 150 deletions(-)
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 7de64ee..83cb1cd 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -78,14 +78,14 @@ struct blkio_cgroup *task_blkio_cgroup(struct task_struct *tsk)
}
EXPORT_SYMBOL_GPL(task_blkio_cgroup);

-static inline void
-blkio_update_group_weight(struct blkio_group *blkg, unsigned int weight)
+static inline void blkio_update_group_weight(struct blkio_group *blkg,
+ int plid, unsigned int weight)
{
struct blkio_policy_type *blkiop;

list_for_each_entry(blkiop, &blkio_list, list) {
/* If this policy does not own the blkg, do not send updates */
- if (blkiop->plid != blkg->plid)
+ if (blkiop->plid != plid)
continue;
if (blkiop->ops.blkio_update_group_weight_fn)
blkiop->ops.blkio_update_group_weight_fn(blkg->q,
@@ -93,15 +93,15 @@ blkio_update_group_weight(struct blkio_group *blkg, unsigned int weight)
}
}

-static inline void blkio_update_group_bps(struct blkio_group *blkg, u64 bps,
- int fileid)
+static inline void blkio_update_group_bps(struct blkio_group *blkg, int plid,
+ u64 bps, int fileid)
{
struct blkio_policy_type *blkiop;

list_for_each_entry(blkiop, &blkio_list, list) {

/* If this policy does not own the blkg, do not send updates */
- if (blkiop->plid != blkg->plid)
+ if (blkiop->plid != plid)
continue;

if (fileid == BLKIO_THROTL_read_bps_device
@@ -117,14 +117,15 @@ static inline void blkio_update_group_bps(struct blkio_group *blkg, u64 bps,
}

static inline void blkio_update_group_iops(struct blkio_group *blkg,
- unsigned int iops, int fileid)
+ int plid, unsigned int iops,
+ int fileid)
{
struct blkio_policy_type *blkiop;

list_for_each_entry(blkiop, &blkio_list, list) {

/* If this policy does not own the blkg, do not send updates */
- if (blkiop->plid != blkg->plid)
+ if (blkiop->plid != plid)
continue;

if (fileid == BLKIO_THROTL_read_iops_device
@@ -182,9 +183,10 @@ static void blkio_check_and_dec_stat(uint64_t *stat, bool direction, bool sync)
#ifdef CONFIG_DEBUG_BLK_CGROUP
/* This should be called with the blkg->stats_lock held. */
static void blkio_set_start_group_wait_time(struct blkio_group *blkg,
- struct blkio_group *curr_blkg)
+ struct blkio_policy_type *pol,
+ struct blkio_group *curr_blkg)
{
- struct blkg_policy_data *pd = blkg->pd[blkg->plid];
+ struct blkg_policy_data *pd = blkg->pd[pol->plid];

if (blkio_blkg_waiting(&pd->stats))
return;
@@ -222,9 +224,10 @@ static void blkio_end_empty_time(struct blkio_group_stats *stats)
blkio_clear_blkg_empty(stats);
}

-void blkiocg_update_set_idle_time_stats(struct blkio_group *blkg)
+void blkiocg_update_set_idle_time_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol)
{
- struct blkg_policy_data *pd = blkg->pd[blkg->plid];
+ struct blkg_policy_data *pd = blkg->pd[pol->plid];
unsigned long flags;

spin_lock_irqsave(&blkg->stats_lock, flags);
@@ -235,9 +238,10 @@ void blkiocg_update_set_idle_time_stats(struct blkio_group *blkg)
}
EXPORT_SYMBOL_GPL(blkiocg_update_set_idle_time_stats);

-void blkiocg_update_idle_time_stats(struct blkio_group *blkg)
+void blkiocg_update_idle_time_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol)
{
- struct blkg_policy_data *pd = blkg->pd[blkg->plid];
+ struct blkg_policy_data *pd = blkg->pd[pol->plid];
unsigned long flags;
unsigned long long now;
struct blkio_group_stats *stats;
@@ -254,9 +258,10 @@ void blkiocg_update_idle_time_stats(struct blkio_group *blkg)
}
EXPORT_SYMBOL_GPL(blkiocg_update_idle_time_stats);

-void blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg)
+void blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol)
{
- struct blkg_policy_data *pd = blkg->pd[blkg->plid];
+ struct blkg_policy_data *pd = blkg->pd[pol->plid];
unsigned long flags;
struct blkio_group_stats *stats;

@@ -271,9 +276,10 @@ void blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg)
}
EXPORT_SYMBOL_GPL(blkiocg_update_avg_queue_size_stats);

-void blkiocg_set_start_empty_time(struct blkio_group *blkg)
+void blkiocg_set_start_empty_time(struct blkio_group *blkg,
+ struct blkio_policy_type *pol)
{
- struct blkg_policy_data *pd = blkg->pd[blkg->plid];
+ struct blkg_policy_data *pd = blkg->pd[pol->plid];
unsigned long flags;
struct blkio_group_stats *stats;

@@ -303,39 +309,43 @@ void blkiocg_set_start_empty_time(struct blkio_group *blkg)
EXPORT_SYMBOL_GPL(blkiocg_set_start_empty_time);

void blkiocg_update_dequeue_stats(struct blkio_group *blkg,
- unsigned long dequeue)
+ struct blkio_policy_type *pol,
+ unsigned long dequeue)
{
- struct blkg_policy_data *pd = blkg->pd[blkg->plid];
+ struct blkg_policy_data *pd = blkg->pd[pol->plid];

pd->stats.dequeue += dequeue;
}
EXPORT_SYMBOL_GPL(blkiocg_update_dequeue_stats);
#else
static inline void blkio_set_start_group_wait_time(struct blkio_group *blkg,
- struct blkio_group *curr_blkg) {}
-static inline void blkio_end_empty_time(struct blkio_group_stats *stats) {}
+ struct blkio_policy_type *pol,
+ struct blkio_group *curr_blkg) { }
+static inline void blkio_end_empty_time(struct blkio_group_stats *stats) { }
#endif

void blkiocg_update_io_add_stats(struct blkio_group *blkg,
- struct blkio_group *curr_blkg, bool direction,
- bool sync)
+ struct blkio_policy_type *pol,
+ struct blkio_group *curr_blkg, bool direction,
+ bool sync)
{
- struct blkg_policy_data *pd = blkg->pd[blkg->plid];
+ struct blkg_policy_data *pd = blkg->pd[pol->plid];
unsigned long flags;

spin_lock_irqsave(&blkg->stats_lock, flags);
blkio_add_stat(pd->stats.stat_arr[BLKIO_STAT_QUEUED], 1, direction,
sync);
blkio_end_empty_time(&pd->stats);
- blkio_set_start_group_wait_time(blkg, curr_blkg);
+ blkio_set_start_group_wait_time(blkg, pol, curr_blkg);
spin_unlock_irqrestore(&blkg->stats_lock, flags);
}
EXPORT_SYMBOL_GPL(blkiocg_update_io_add_stats);

void blkiocg_update_io_remove_stats(struct blkio_group *blkg,
- bool direction, bool sync)
+ struct blkio_policy_type *pol,
+ bool direction, bool sync)
{
- struct blkg_policy_data *pd = blkg->pd[blkg->plid];
+ struct blkg_policy_data *pd = blkg->pd[pol->plid];
unsigned long flags;

spin_lock_irqsave(&blkg->stats_lock, flags);
@@ -345,10 +355,12 @@ void blkiocg_update_io_remove_stats(struct blkio_group *blkg,
}
EXPORT_SYMBOL_GPL(blkiocg_update_io_remove_stats);

-void blkiocg_update_timeslice_used(struct blkio_group *blkg, unsigned long time,
- unsigned long unaccounted_time)
+void blkiocg_update_timeslice_used(struct blkio_group *blkg,
+ struct blkio_policy_type *pol,
+ unsigned long time,
+ unsigned long unaccounted_time)
{
- struct blkg_policy_data *pd = blkg->pd[blkg->plid];
+ struct blkg_policy_data *pd = blkg->pd[pol->plid];
unsigned long flags;

spin_lock_irqsave(&blkg->stats_lock, flags);
@@ -365,9 +377,10 @@ EXPORT_SYMBOL_GPL(blkiocg_update_timeslice_used);
* is valid.
*/
void blkiocg_update_dispatch_stats(struct blkio_group *blkg,
- uint64_t bytes, bool direction, bool sync)
+ struct blkio_policy_type *pol,
+ uint64_t bytes, bool direction, bool sync)
{
- struct blkg_policy_data *pd = blkg->pd[blkg->plid];
+ struct blkg_policy_data *pd = blkg->pd[pol->plid];
struct blkio_group_stats_cpu *stats_cpu;
unsigned long flags;

@@ -392,9 +405,12 @@ void blkiocg_update_dispatch_stats(struct blkio_group *blkg,
EXPORT_SYMBOL_GPL(blkiocg_update_dispatch_stats);

void blkiocg_update_completion_stats(struct blkio_group *blkg,
- uint64_t start_time, uint64_t io_start_time, bool direction, bool sync)
+ struct blkio_policy_type *pol,
+ uint64_t start_time,
+ uint64_t io_start_time, bool direction,
+ bool sync)
{
- struct blkg_policy_data *pd = blkg->pd[blkg->plid];
+ struct blkg_policy_data *pd = blkg->pd[pol->plid];
struct blkio_group_stats *stats;
unsigned long flags;
unsigned long long now = sched_clock();
@@ -412,10 +428,11 @@ void blkiocg_update_completion_stats(struct blkio_group *blkg,
EXPORT_SYMBOL_GPL(blkiocg_update_completion_stats);

/* Merged stats are per cpu. */
-void blkiocg_update_io_merged_stats(struct blkio_group *blkg, bool direction,
- bool sync)
+void blkiocg_update_io_merged_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol,
+ bool direction, bool sync)
{
- struct blkg_policy_data *pd = blkg->pd[blkg->plid];
+ struct blkg_policy_data *pd = blkg->pd[pol->plid];
struct blkio_group_stats_cpu *stats_cpu;
unsigned long flags;

@@ -681,9 +698,9 @@ void __blkg_release(struct blkio_group *blkg)
}
EXPORT_SYMBOL_GPL(__blkg_release);

-static void blkio_reset_stats_cpu(struct blkio_group *blkg)
+static void blkio_reset_stats_cpu(struct blkio_group *blkg, int plid)
{
- struct blkg_policy_data *pd = blkg->pd[blkg->plid];
+ struct blkg_policy_data *pd = blkg->pd[plid];
struct blkio_group_stats_cpu *stats_cpu;
int i, j, k;
/*
@@ -754,7 +771,7 @@ blkiocg_reset_stats(struct cgroup *cgroup, struct cftype *cftype, u64 val)
spin_unlock(&blkg->stats_lock);

/* Reset Per cpu stats which don't take blkg->stats_lock */
- blkio_reset_stats_cpu(blkg);
+ blkio_reset_stats_cpu(blkg, blkg->plid);
}

spin_unlock_irq(&blkcg->lock);
@@ -803,10 +820,10 @@ static uint64_t blkio_fill_stat(char *str, int chars_left, uint64_t val,
}


-static uint64_t blkio_read_stat_cpu(struct blkio_group *blkg,
+static uint64_t blkio_read_stat_cpu(struct blkio_group *blkg, int plid,
enum stat_type_cpu type, enum stat_sub_type sub_type)
{
- struct blkg_policy_data *pd = blkg->pd[blkg->plid];
+ struct blkg_policy_data *pd = blkg->pd[plid];
int cpu;
struct blkio_group_stats_cpu *stats_cpu;
u64 val = 0, tval;
@@ -829,7 +846,7 @@ static uint64_t blkio_read_stat_cpu(struct blkio_group *blkg,
return val;
}

-static uint64_t blkio_get_stat_cpu(struct blkio_group *blkg,
+static uint64_t blkio_get_stat_cpu(struct blkio_group *blkg, int plid,
struct cgroup_map_cb *cb, const char *dname,
enum stat_type_cpu type)
{
@@ -838,7 +855,7 @@ static uint64_t blkio_get_stat_cpu(struct blkio_group *blkg,
enum stat_sub_type sub_type;

if (type == BLKIO_STAT_CPU_SECTORS) {
- val = blkio_read_stat_cpu(blkg, type, 0);
+ val = blkio_read_stat_cpu(blkg, plid, type, 0);
return blkio_fill_stat(key_str, MAX_KEY_LEN - 1, val, cb,
dname);
}
@@ -847,12 +864,12 @@ static uint64_t blkio_get_stat_cpu(struct blkio_group *blkg,
sub_type++) {
blkio_get_key_name(sub_type, dname, key_str, MAX_KEY_LEN,
false);
- val = blkio_read_stat_cpu(blkg, type, sub_type);
+ val = blkio_read_stat_cpu(blkg, plid, type, sub_type);
cb->fill(cb, key_str, val);
}

- disk_total = blkio_read_stat_cpu(blkg, type, BLKIO_STAT_READ) +
- blkio_read_stat_cpu(blkg, type, BLKIO_STAT_WRITE);
+ disk_total = blkio_read_stat_cpu(blkg, plid, type, BLKIO_STAT_READ) +
+ blkio_read_stat_cpu(blkg, plid, type, BLKIO_STAT_WRITE);

blkio_get_key_name(BLKIO_STAT_TOTAL, dname, key_str, MAX_KEY_LEN,
false);
@@ -861,11 +878,11 @@ static uint64_t blkio_get_stat_cpu(struct blkio_group *blkg,
}

/* This should be called with blkg->stats_lock held */
-static uint64_t blkio_get_stat(struct blkio_group *blkg,
+static uint64_t blkio_get_stat(struct blkio_group *blkg, int plid,
struct cgroup_map_cb *cb, const char *dname,
enum stat_type type)
{
- struct blkg_policy_data *pd = blkg->pd[blkg->plid];
+ struct blkg_policy_data *pd = blkg->pd[plid];
uint64_t disk_total;
char key_str[MAX_KEY_LEN];
enum stat_sub_type sub_type;
@@ -989,29 +1006,29 @@ static int blkio_policy_parse_and_set(char *buf, enum blkio_policy_id plid,
goto out_unlock;

pd->conf.weight = temp;
- blkio_update_group_weight(blkg, temp ?: blkcg->weight);
+ blkio_update_group_weight(blkg, plid, temp ?: blkcg->weight);
break;
case BLKIO_POLICY_THROTL:
switch(fileid) {
case BLKIO_THROTL_read_bps_device:
pd->conf.bps[READ] = temp;
- blkio_update_group_bps(blkg, temp ?: -1, fileid);
+ blkio_update_group_bps(blkg, plid, temp ?: -1, fileid);
break;
case BLKIO_THROTL_write_bps_device:
pd->conf.bps[WRITE] = temp;
- blkio_update_group_bps(blkg, temp ?: -1, fileid);
+ blkio_update_group_bps(blkg, plid, temp ?: -1, fileid);
break;
case BLKIO_THROTL_read_iops_device:
if (temp > THROTL_IOPS_MAX)
goto out_unlock;
pd->conf.iops[READ] = temp;
- blkio_update_group_iops(blkg, temp ?: -1, fileid);
+ blkio_update_group_iops(blkg, plid, temp ?: -1, fileid);
break;
case BLKIO_THROTL_write_iops_device:
if (temp > THROTL_IOPS_MAX)
goto out_unlock;
pd->conf.iops[WRITE] = temp;
- blkio_update_group_iops(blkg, temp ?: -1, fileid);
+ blkio_update_group_iops(blkg, plid, temp ?: -1, fileid);
break;
}
break;
@@ -1058,12 +1075,13 @@ static int blkiocg_file_write(struct cgroup *cgrp, struct cftype *cft,
static void blkio_print_group_conf(struct cftype *cft, struct blkio_group *blkg,
struct seq_file *m)
{
- struct blkg_policy_data *pd = blkg->pd[blkg->plid];
- const char *dname = dev_name(blkg->q->backing_dev_info.dev);
+ int plid = BLKIOFILE_POLICY(cft->private);
int fileid = BLKIOFILE_ATTR(cft->private);
+ struct blkg_policy_data *pd = blkg->pd[plid];
+ const char *dname = dev_name(blkg->q->backing_dev_info.dev);
int rw = WRITE;

- switch (blkg->plid) {
+ switch (plid) {
case BLKIO_POLICY_PROP:
if (pd->conf.weight)
seq_printf(m, "%s\t%u\n",
@@ -1155,15 +1173,17 @@ static int blkio_read_blkg_stats(struct blkio_cgroup *blkcg,
rcu_read_lock();
hlist_for_each_entry_rcu(blkg, n, &blkcg->blkg_list, blkcg_node) {
const char *dname = dev_name(blkg->q->backing_dev_info.dev);
+ int plid = BLKIOFILE_POLICY(cft->private);

- if (BLKIOFILE_POLICY(cft->private) != blkg->plid)
+ if (plid != blkg->plid)
continue;
- if (pcpu)
- cgroup_total += blkio_get_stat_cpu(blkg, cb, dname,
- type);
- else {
+ if (pcpu) {
+ cgroup_total += blkio_get_stat_cpu(blkg, plid,
+ cb, dname, type);
+ } else {
spin_lock_irq(&blkg->stats_lock);
- cgroup_total += blkio_get_stat(blkg, cb, dname, type);
+ cgroup_total += blkio_get_stat(blkg, plid,
+ cb, dname, type);
spin_unlock_irq(&blkg->stats_lock);
}
}
@@ -1269,7 +1289,7 @@ static int blkio_weight_write(struct blkio_cgroup *blkcg, int plid, u64 val)
struct blkg_policy_data *pd = blkg->pd[blkg->plid];

if (blkg->plid == plid && !pd->conf.weight)
- blkio_update_group_weight(blkg, blkcg->weight);
+ blkio_update_group_weight(blkg, plid, blkcg->weight);
}

spin_unlock_irq(&blkcg->lock);
diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index 5dffd43..60e96b4 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -335,12 +335,17 @@ static inline void blkg_put(struct blkio_group *blkg) { }
#define BLKIO_WEIGHT_DEFAULT 500

#ifdef CONFIG_DEBUG_BLK_CGROUP
-void blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg);
+void blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol);
void blkiocg_update_dequeue_stats(struct blkio_group *blkg,
- unsigned long dequeue);
-void blkiocg_update_set_idle_time_stats(struct blkio_group *blkg);
-void blkiocg_update_idle_time_stats(struct blkio_group *blkg);
-void blkiocg_set_start_empty_time(struct blkio_group *blkg);
+ struct blkio_policy_type *pol,
+ unsigned long dequeue);
+void blkiocg_update_set_idle_time_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol);
+void blkiocg_update_idle_time_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol);
+void blkiocg_set_start_empty_time(struct blkio_group *blkg,
+ struct blkio_policy_type *pol);

#define BLKG_FLAG_FNS(name) \
static inline void blkio_mark_blkg_##name( \
@@ -363,14 +368,16 @@ BLKG_FLAG_FNS(idling)
BLKG_FLAG_FNS(empty)
#undef BLKG_FLAG_FNS
#else
-static inline void blkiocg_update_avg_queue_size_stats(
- struct blkio_group *blkg) {}
+static inline void blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol) { }
static inline void blkiocg_update_dequeue_stats(struct blkio_group *blkg,
- unsigned long dequeue) {}
-static inline void blkiocg_update_set_idle_time_stats(struct blkio_group *blkg)
-{}
-static inline void blkiocg_update_idle_time_stats(struct blkio_group *blkg) {}
-static inline void blkiocg_set_start_empty_time(struct blkio_group *blkg) {}
+ struct blkio_policy_type *pol, unsigned long dequeue) { }
+static inline void blkiocg_update_set_idle_time_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol) { }
+static inline void blkiocg_update_idle_time_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol) { }
+static inline void blkiocg_set_start_empty_time(struct blkio_group *blkg,
+ struct blkio_policy_type *pol) { }
#endif

#ifdef CONFIG_BLK_CGROUP
@@ -386,18 +393,27 @@ struct blkio_group *blkg_lookup_create(struct blkio_cgroup *blkcg,
enum blkio_policy_id plid,
bool for_root);
void blkiocg_update_timeslice_used(struct blkio_group *blkg,
- unsigned long time,
- unsigned long unaccounted_time);
-void blkiocg_update_dispatch_stats(struct blkio_group *blkg, uint64_t bytes,
- bool direction, bool sync);
+ struct blkio_policy_type *pol,
+ unsigned long time,
+ unsigned long unaccounted_time);
+void blkiocg_update_dispatch_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol,
+ uint64_t bytes, bool direction, bool sync);
void blkiocg_update_completion_stats(struct blkio_group *blkg,
- uint64_t start_time, uint64_t io_start_time, bool direction, bool sync);
-void blkiocg_update_io_merged_stats(struct blkio_group *blkg, bool direction,
- bool sync);
+ struct blkio_policy_type *pol,
+ uint64_t start_time,
+ uint64_t io_start_time, bool direction,
+ bool sync);
+void blkiocg_update_io_merged_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol,
+ bool direction, bool sync);
void blkiocg_update_io_add_stats(struct blkio_group *blkg,
- struct blkio_group *curr_blkg, bool direction, bool sync);
+ struct blkio_policy_type *pol,
+ struct blkio_group *curr_blkg, bool direction,
+ bool sync);
void blkiocg_update_io_remove_stats(struct blkio_group *blkg,
- bool direction, bool sync);
+ struct blkio_policy_type *pol,
+ bool direction, bool sync);
#else
struct cgroup;
static inline struct blkio_cgroup *
@@ -411,19 +427,23 @@ blkiocg_del_blkio_group(struct blkio_group *blkg) { return 0; }
static inline struct blkio_group *blkg_lookup(struct blkio_cgroup *blkcg,
void *key) { return NULL; }
static inline void blkiocg_update_timeslice_used(struct blkio_group *blkg,
- unsigned long time,
- unsigned long unaccounted_time)
-{}
+ struct blkio_policy_type *pol, unsigned long time,
+ unsigned long unaccounted_time) { }
static inline void blkiocg_update_dispatch_stats(struct blkio_group *blkg,
- uint64_t bytes, bool direction, bool sync) {}
+ struct blkio_policy_type *pol, uint64_t bytes,
+ bool direction, bool sync) { }
static inline void blkiocg_update_completion_stats(struct blkio_group *blkg,
- uint64_t start_time, uint64_t io_start_time, bool direction,
- bool sync) {}
+ struct blkio_policy_type *pol, uint64_t start_time,
+ uint64_t io_start_time, bool direction, bool sync) { }
static inline void blkiocg_update_io_merged_stats(struct blkio_group *blkg,
- bool direction, bool sync) {}
+ struct blkio_policy_type *pol, bool direction,
+ bool sync) { }
static inline void blkiocg_update_io_add_stats(struct blkio_group *blkg,
- struct blkio_group *curr_blkg, bool direction, bool sync) {}
+ struct blkio_policy_type *pol,
+ struct blkio_group *curr_blkg, bool direction,
+ bool sync) { }
static inline void blkiocg_update_io_remove_stats(struct blkio_group *blkg,
- bool direction, bool sync) {}
+ struct blkio_policy_type *pol, bool direction,
+ bool sync) { }
#endif
#endif /* _BLK_CGROUP_H */
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 153ba50..b2fddaf 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -588,7 +588,8 @@ static void throtl_charge_bio(struct throtl_grp *tg, struct bio *bio)
tg->bytes_disp[rw] += bio->bi_size;
tg->io_disp[rw]++;

- blkiocg_update_dispatch_stats(tg_to_blkg(tg), bio->bi_size, rw, sync);
+ blkiocg_update_dispatch_stats(tg_to_blkg(tg), &blkio_policy_throtl,
+ bio->bi_size, rw, sync);
}

static void throtl_add_bio_tg(struct throtl_data *td, struct throtl_grp *tg,
@@ -1000,6 +1001,7 @@ bool blk_throtl_bio(struct request_queue *q, struct bio *bio)
if (tg) {
if (tg_no_rule_group(tg, rw)) {
blkiocg_update_dispatch_stats(tg_to_blkg(tg),
+ &blkio_policy_throtl,
bio->bi_size, rw,
rw_is_sync(bio->bi_rw));
goto out_unlock_rcu;
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 8698002..11dd9d7 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -945,7 +945,8 @@ cfq_group_notify_queue_del(struct cfq_data *cfqd, struct cfq_group *cfqg)
cfq_log_cfqg(cfqd, cfqg, "del_from_rr group");
cfq_group_service_tree_del(st, cfqg);
cfqg->saved_workload_slice = 0;
- cfq_blkiocg_update_dequeue_stats(cfqg_to_blkg(cfqg), 1);
+ cfq_blkiocg_update_dequeue_stats(cfqg_to_blkg(cfqg),
+ &blkio_policy_cfq, 1);
}

static inline unsigned int cfq_cfqq_slice_usage(struct cfq_queue *cfqq,
@@ -1017,9 +1018,9 @@ static void cfq_group_served(struct cfq_data *cfqd, struct cfq_group *cfqg,
"sl_used=%u disp=%u charge=%u iops=%u sect=%lu",
used_sl, cfqq->slice_dispatch, charge,
iops_mode(cfqd), cfqq->nr_sectors);
- cfq_blkiocg_update_timeslice_used(cfqg_to_blkg(cfqg), used_sl,
- unaccounted_sl);
- cfq_blkiocg_set_start_empty_time(cfqg_to_blkg(cfqg));
+ cfq_blkiocg_update_timeslice_used(cfqg_to_blkg(cfqg), &blkio_policy_cfq,
+ used_sl, unaccounted_sl);
+ cfq_blkiocg_set_start_empty_time(cfqg_to_blkg(cfqg), &blkio_policy_cfq);
}

/**
@@ -1463,9 +1464,11 @@ static void cfq_reposition_rq_rb(struct cfq_queue *cfqq, struct request *rq)
elv_rb_del(&cfqq->sort_list, rq);
cfqq->queued[rq_is_sync(rq)]--;
cfq_blkiocg_update_io_remove_stats(cfqg_to_blkg(RQ_CFQG(rq)),
- rq_data_dir(rq), rq_is_sync(rq));
+ &blkio_policy_cfq, rq_data_dir(rq),
+ rq_is_sync(rq));
cfq_add_rq_rb(rq);
cfq_blkiocg_update_io_add_stats(cfqg_to_blkg(RQ_CFQG(rq)),
+ &blkio_policy_cfq,
cfqg_to_blkg(cfqq->cfqd->serving_group),
rq_data_dir(rq), rq_is_sync(rq));
}
@@ -1524,7 +1527,8 @@ static void cfq_remove_request(struct request *rq)

cfqq->cfqd->rq_queued--;
cfq_blkiocg_update_io_remove_stats(cfqg_to_blkg(RQ_CFQG(rq)),
- rq_data_dir(rq), rq_is_sync(rq));
+ &blkio_policy_cfq, rq_data_dir(rq),
+ rq_is_sync(rq));
if (rq->cmd_flags & REQ_PRIO) {
WARN_ON(!cfqq->prio_pending);
cfqq->prio_pending--;
@@ -1560,7 +1564,8 @@ static void cfq_bio_merged(struct request_queue *q, struct request *req,
struct bio *bio)
{
cfq_blkiocg_update_io_merged_stats(cfqg_to_blkg(RQ_CFQG(req)),
- bio_data_dir(bio), cfq_bio_sync(bio));
+ &blkio_policy_cfq, bio_data_dir(bio),
+ cfq_bio_sync(bio));
}

static void
@@ -1583,7 +1588,8 @@ cfq_merged_requests(struct request_queue *q, struct request *rq,
cfqq->next_rq = rq;
cfq_remove_request(next);
cfq_blkiocg_update_io_merged_stats(cfqg_to_blkg(RQ_CFQG(rq)),
- rq_data_dir(next), rq_is_sync(next));
+ &blkio_policy_cfq, rq_data_dir(next),
+ rq_is_sync(next));

cfqq = RQ_CFQQ(next);
/*
@@ -1624,7 +1630,8 @@ static int cfq_allow_merge(struct request_queue *q, struct request *rq,
static inline void cfq_del_timer(struct cfq_data *cfqd, struct cfq_queue *cfqq)
{
del_timer(&cfqd->idle_slice_timer);
- cfq_blkiocg_update_idle_time_stats(cfqg_to_blkg(cfqq->cfqg));
+ cfq_blkiocg_update_idle_time_stats(cfqg_to_blkg(cfqq->cfqg),
+ &blkio_policy_cfq);
}

static void __cfq_set_active_queue(struct cfq_data *cfqd,
@@ -1633,7 +1640,8 @@ static void __cfq_set_active_queue(struct cfq_data *cfqd,
if (cfqq) {
cfq_log_cfqq(cfqd, cfqq, "set_active wl_prio:%d wl_type:%d",
cfqd->serving_prio, cfqd->serving_type);
- cfq_blkiocg_update_avg_queue_size_stats(cfqg_to_blkg(cfqq->cfqg));
+ cfq_blkiocg_update_avg_queue_size_stats(cfqg_to_blkg(cfqq->cfqg),
+ &blkio_policy_cfq);
cfqq->slice_start = 0;
cfqq->dispatch_start = jiffies;
cfqq->allocated_slice = 0;
@@ -1981,7 +1989,8 @@ static void cfq_arm_slice_timer(struct cfq_data *cfqd)
sl = cfqd->cfq_slice_idle;

mod_timer(&cfqd->idle_slice_timer, jiffies + sl);
- cfq_blkiocg_update_set_idle_time_stats(cfqg_to_blkg(cfqq->cfqg));
+ cfq_blkiocg_update_set_idle_time_stats(cfqg_to_blkg(cfqq->cfqg),
+ &blkio_policy_cfq);
cfq_log_cfqq(cfqd, cfqq, "arm_idle: %lu group_idle: %d", sl,
group_idle ? 1 : 0);
}
@@ -2005,8 +2014,8 @@ static void cfq_dispatch_insert(struct request_queue *q, struct request *rq)
cfqd->rq_in_flight[cfq_cfqq_sync(cfqq)]++;
cfqq->nr_sectors += blk_rq_sectors(rq);
cfq_blkiocg_update_dispatch_stats(cfqg_to_blkg(cfqq->cfqg),
- blk_rq_bytes(rq), rq_data_dir(rq),
- rq_is_sync(rq));
+ &blkio_policy_cfq, blk_rq_bytes(rq),
+ rq_data_dir(rq), rq_is_sync(rq));
}

/*
@@ -3094,7 +3103,8 @@ cfq_rq_enqueued(struct cfq_data *cfqd, struct cfq_queue *cfqq,
__blk_run_queue(cfqd->queue);
} else {
cfq_blkiocg_update_idle_time_stats(
- cfqg_to_blkg(cfqq->cfqg));
+ cfqg_to_blkg(cfqq->cfqg),
+ &blkio_policy_cfq);
cfq_mark_cfqq_must_dispatch(cfqq);
}
}
@@ -3122,6 +3132,7 @@ static void cfq_insert_request(struct request_queue *q, struct request *rq)
list_add_tail(&rq->queuelist, &cfqq->fifo);
cfq_add_rq_rb(rq);
cfq_blkiocg_update_io_add_stats(cfqg_to_blkg(RQ_CFQG(rq)),
+ &blkio_policy_cfq,
cfqg_to_blkg(cfqd->serving_group),
rq_data_dir(rq), rq_is_sync(rq));
cfq_rq_enqueued(cfqd, cfqq, rq);
@@ -3220,8 +3231,9 @@ static void cfq_completed_request(struct request_queue *q, struct request *rq)
cfqq->dispatched--;
(RQ_CFQG(rq))->dispatched--;
cfq_blkiocg_update_completion_stats(cfqg_to_blkg(cfqq->cfqg),
- rq_start_time_ns(rq), rq_io_start_time_ns(rq),
- rq_data_dir(rq), rq_is_sync(rq));
+ &blkio_policy_cfq, rq_start_time_ns(rq),
+ rq_io_start_time_ns(rq), rq_data_dir(rq),
+ rq_is_sync(rq));

cfqd->rq_in_flight[cfq_cfqq_sync(cfqq)]--;

diff --git a/block/cfq.h b/block/cfq.h
index 3987601..5584e1b 100644
--- a/block/cfq.h
+++ b/block/cfq.h
@@ -4,67 +4,79 @@

#ifdef CONFIG_CFQ_GROUP_IOSCHED
static inline void cfq_blkiocg_update_io_add_stats(struct blkio_group *blkg,
- struct blkio_group *curr_blkg, bool direction, bool sync)
+ struct blkio_policy_type *pol,
+ struct blkio_group *curr_blkg,
+ bool direction, bool sync)
{
- blkiocg_update_io_add_stats(blkg, curr_blkg, direction, sync);
+ blkiocg_update_io_add_stats(blkg, pol, curr_blkg, direction, sync);
}

static inline void cfq_blkiocg_update_dequeue_stats(struct blkio_group *blkg,
- unsigned long dequeue)
+ struct blkio_policy_type *pol, unsigned long dequeue)
{
- blkiocg_update_dequeue_stats(blkg, dequeue);
+ blkiocg_update_dequeue_stats(blkg, pol, dequeue);
}

static inline void cfq_blkiocg_update_timeslice_used(struct blkio_group *blkg,
- unsigned long time, unsigned long unaccounted_time)
+ struct blkio_policy_type *pol, unsigned long time,
+ unsigned long unaccounted_time)
{
- blkiocg_update_timeslice_used(blkg, time, unaccounted_time);
+ blkiocg_update_timeslice_used(blkg, pol, time, unaccounted_time);
}

-static inline void cfq_blkiocg_set_start_empty_time(struct blkio_group *blkg)
+static inline void cfq_blkiocg_set_start_empty_time(struct blkio_group *blkg,
+ struct blkio_policy_type *pol)
{
- blkiocg_set_start_empty_time(blkg);
+ blkiocg_set_start_empty_time(blkg, pol);
}

static inline void cfq_blkiocg_update_io_remove_stats(struct blkio_group *blkg,
- bool direction, bool sync)
+ struct blkio_policy_type *pol, bool direction,
+ bool sync)
{
- blkiocg_update_io_remove_stats(blkg, direction, sync);
+ blkiocg_update_io_remove_stats(blkg, pol, direction, sync);
}

static inline void cfq_blkiocg_update_io_merged_stats(struct blkio_group *blkg,
- bool direction, bool sync)
+ struct blkio_policy_type *pol, bool direction,
+ bool sync)
{
- blkiocg_update_io_merged_stats(blkg, direction, sync);
+ blkiocg_update_io_merged_stats(blkg, pol, direction, sync);
}

-static inline void cfq_blkiocg_update_idle_time_stats(struct blkio_group *blkg)
+static inline void cfq_blkiocg_update_idle_time_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol)
{
- blkiocg_update_idle_time_stats(blkg);
+ blkiocg_update_idle_time_stats(blkg, pol);
}

static inline void
-cfq_blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg)
+cfq_blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol)
{
- blkiocg_update_avg_queue_size_stats(blkg);
+ blkiocg_update_avg_queue_size_stats(blkg, pol);
}

static inline void
-cfq_blkiocg_update_set_idle_time_stats(struct blkio_group *blkg)
+cfq_blkiocg_update_set_idle_time_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol)
{
- blkiocg_update_set_idle_time_stats(blkg);
+ blkiocg_update_set_idle_time_stats(blkg, pol);
}

static inline void cfq_blkiocg_update_dispatch_stats(struct blkio_group *blkg,
- uint64_t bytes, bool direction, bool sync)
+ struct blkio_policy_type *pol, uint64_t bytes,
+ bool direction, bool sync)
{
- blkiocg_update_dispatch_stats(blkg, bytes, direction, sync);
+ blkiocg_update_dispatch_stats(blkg, pol, bytes, direction, sync);
}

-static inline void cfq_blkiocg_update_completion_stats(struct blkio_group *blkg, uint64_t start_time, uint64_t io_start_time, bool direction, bool sync)
+static inline void cfq_blkiocg_update_completion_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol, uint64_t start_time,
+ uint64_t io_start_time, bool direction, bool sync)
{
- blkiocg_update_completion_stats(blkg, start_time, io_start_time,
- direction, sync);
+ blkiocg_update_completion_stats(blkg, pol, start_time, io_start_time,
+ direction, sync);
}

static inline int cfq_blkiocg_del_blkio_group(struct blkio_group *blkg)
@@ -74,30 +86,38 @@ static inline int cfq_blkiocg_del_blkio_group(struct blkio_group *blkg)

#else /* CFQ_GROUP_IOSCHED */
static inline void cfq_blkiocg_update_io_add_stats(struct blkio_group *blkg,
- struct blkio_group *curr_blkg, bool direction, bool sync) {}
-
+ struct blkio_policy_type *pol,
+ struct blkio_group *curr_blkg, bool direction,
+ bool sync) { }
static inline void cfq_blkiocg_update_dequeue_stats(struct blkio_group *blkg,
- unsigned long dequeue) {}
-
+ struct blkio_policy_type *pol, unsigned long dequeue) { }
static inline void cfq_blkiocg_update_timeslice_used(struct blkio_group *blkg,
- unsigned long time, unsigned long unaccounted_time) {}
-static inline void cfq_blkiocg_set_start_empty_time(struct blkio_group *blkg) {}
+ struct blkio_policy_type *pol, unsigned long time,
+ unsigned long unaccounted_time) { }
+static inline void cfq_blkiocg_set_start_empty_time(struct blkio_group *blkg,
+ struct blkio_policy_type *pol) { }
static inline void cfq_blkiocg_update_io_remove_stats(struct blkio_group *blkg,
- bool direction, bool sync) {}
+ struct blkio_policy_type *pol, bool direction,
+ bool sync) { }
static inline void cfq_blkiocg_update_io_merged_stats(struct blkio_group *blkg,
- bool direction, bool sync) {}
-static inline void cfq_blkiocg_update_idle_time_stats(struct blkio_group *blkg)
-{
-}
+ struct blkio_policy_type *pol, bool direction,
+ bool sync) { }
+static inline void cfq_blkiocg_update_idle_time_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol) { }
static inline void
-cfq_blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg) {}
+cfq_blkiocg_update_avg_queue_size_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol) { }

static inline void
-cfq_blkiocg_update_set_idle_time_stats(struct blkio_group *blkg) {}
+cfq_blkiocg_update_set_idle_time_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol) { }

static inline void cfq_blkiocg_update_dispatch_stats(struct blkio_group *blkg,
- uint64_t bytes, bool direction, bool sync) {}
-static inline void cfq_blkiocg_update_completion_stats(struct blkio_group *blkg, uint64_t start_time, uint64_t io_start_time, bool direction, bool sync) {}
+ struct blkio_policy_type *pol, uint64_t bytes,
+ bool direction, bool sync) { }
+static inline void cfq_blkiocg_update_completion_stats(struct blkio_group *blkg,
+ struct blkio_policy_type *pol, uint64_t start_time,
+ uint64_t io_start_time, bool direction, bool sync) { }

static inline int cfq_blkiocg_del_blkio_group(struct blkio_group *blkg)
{
--
1.7.7.3


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