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block: rename CONFIG_DEBUG_BLK_CGROUP to CONFIG_BFQ_CGROUP_DEBUG

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This option is entirely bfq specific, give it an appropinquate name.

Also make it depend on CONFIG_BFQ_GROUP_IOSCHED in Kconfig, as all
the functionality already does so anyway.

Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2019-06-06 12:26:24 +02:00
committed by Jens Axboe
parent d6258980da
commit 8060c47ba8
7 changed files with 38 additions and 40 deletions
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7
block/Kconfig.iosched
View File

@@ -36,6 +36,13 @@ config BFQ_GROUP_IOSCHED
Enable hierarchical scheduling in BFQ, using the blkio
(cgroups-v1) or io (cgroups-v2) controller.
config BFQ_CGROUP_DEBUG
bool "BFQ IO controller debugging"
depends on BFQ_GROUP_IOSCHED
---help---
Enable some debugging help. Currently it exports additional stat
files in a cgroup which can be useful for debugging.
endmenu
endif

27
block/bfq-cgroup.c
View File

@@ -15,8 +15,7 @@
#include "bfq-iosched.h"
#if defined(CONFIG_BFQ_GROUP_IOSCHED) && defined(CONFIG_DEBUG_BLK_CGROUP)
#ifdef CONFIG_BFQ_CGROUP_DEBUG
static int bfq_stat_init(struct bfq_stat *stat, gfp_t gfp)
{
int ret;
@@ -253,7 +252,7 @@ void bfqg_stats_update_completion(struct bfq_group *bfqg, u64 start_time_ns,
io_start_time_ns - start_time_ns);
}
#else /* CONFIG_BFQ_GROUP_IOSCHED && CONFIG_DEBUG_BLK_CGROUP */
#else /* CONFIG_BFQ_CGROUP_DEBUG */
void bfqg_stats_update_io_add(struct bfq_group *bfqg, struct bfq_queue *bfqq,
unsigned int op) { }
@@ -267,7 +266,7 @@ void bfqg_stats_update_idle_time(struct bfq_group *bfqg) { }
void bfqg_stats_set_start_idle_time(struct bfq_group *bfqg) { }
void bfqg_stats_update_avg_queue_size(struct bfq_group *bfqg) { }
#endif /* CONFIG_BFQ_GROUP_IOSCHED && CONFIG_DEBUG_BLK_CGROUP */
#endif /* CONFIG_BFQ_CGROUP_DEBUG */
#ifdef CONFIG_BFQ_GROUP_IOSCHED
@@ -351,7 +350,7 @@ void bfqg_and_blkg_put(struct bfq_group *bfqg)
/* @stats = 0 */
static void bfqg_stats_reset(struct bfqg_stats *stats)
{
#ifdef CONFIG_DEBUG_BLK_CGROUP
#ifdef CONFIG_BFQ_CGROUP_DEBUG
/* queued stats shouldn't be cleared */
blkg_rwstat_reset(&stats->merged);
blkg_rwstat_reset(&stats->service_time);
@@ -372,7 +371,7 @@ static void bfqg_stats_add_aux(struct bfqg_stats *to, struct bfqg_stats *from)
if (!to || !from)
return;
#ifdef CONFIG_DEBUG_BLK_CGROUP
#ifdef CONFIG_BFQ_CGROUP_DEBUG
/* queued stats shouldn't be cleared */
blkg_rwstat_add_aux(&to->merged, &from->merged);
blkg_rwstat_add_aux(&to->service_time, &from->service_time);
@@ -432,7 +431,7 @@ void bfq_init_entity(struct bfq_entity *entity, struct bfq_group *bfqg)
static void bfqg_stats_exit(struct bfqg_stats *stats)
{
#ifdef CONFIG_DEBUG_BLK_CGROUP
#ifdef CONFIG_BFQ_CGROUP_DEBUG
blkg_rwstat_exit(&stats->merged);
blkg_rwstat_exit(&stats->service_time);
blkg_rwstat_exit(&stats->wait_time);
@@ -449,7 +448,7 @@ static void bfqg_stats_exit(struct bfqg_stats *stats)
static int bfqg_stats_init(struct bfqg_stats *stats, gfp_t gfp)
{
#ifdef CONFIG_DEBUG_BLK_CGROUP
#ifdef CONFIG_BFQ_CGROUP_DEBUG
if (blkg_rwstat_init(&stats->merged, gfp) ||
blkg_rwstat_init(&stats->service_time, gfp) ||
blkg_rwstat_init(&stats->wait_time, gfp) ||
@@ -986,7 +985,7 @@ static ssize_t bfq_io_set_weight(struct kernfs_open_file *of,
return ret ?: nbytes;
}
#ifdef CONFIG_DEBUG_BLK_CGROUP
#ifdef CONFIG_BFQ_CGROUP_DEBUG
static int bfqg_print_stat(struct seq_file *sf, void *v)
{
blkcg_print_blkgs(sf, css_to_blkcg(seq_css(sf)), blkg_prfill_stat,
@@ -1109,7 +1108,7 @@ static int bfqg_print_avg_queue_size(struct seq_file *sf, void *v)
0, false);
return 0;
}
#endif /* CONFIG_DEBUG_BLK_CGROUP */
#endif /* CONFIG_BFQ_CGROUP_DEBUG */
struct bfq_group *bfq_create_group_hierarchy(struct bfq_data *bfqd, int node)
{
@@ -1157,7 +1156,7 @@ struct cftype bfq_blkcg_legacy_files[] = {
.private = (unsigned long)&blkcg_policy_bfq,
.seq_show = blkg_print_stat_ios,
},
#ifdef CONFIG_DEBUG_BLK_CGROUP
#ifdef CONFIG_BFQ_CGROUP_DEBUG
{
.name = "bfq.time",
.private = offsetof(struct bfq_group, stats.time),
@@ -1187,7 +1186,7 @@ struct cftype bfq_blkcg_legacy_files[] = {
.private = offsetof(struct bfq_group, stats.queued),
.seq_show = bfqg_print_rwstat,
},
#endif /* CONFIG_DEBUG_BLK_CGROUP */
#endif /* CONFIG_BFQ_CGROUP_DEBUG */
/* the same statistics which cover the bfqg and its descendants */
{
@@ -1200,7 +1199,7 @@ struct cftype bfq_blkcg_legacy_files[] = {
.private = (unsigned long)&blkcg_policy_bfq,
.seq_show = blkg_print_stat_ios_recursive,
},
#ifdef CONFIG_DEBUG_BLK_CGROUP
#ifdef CONFIG_BFQ_CGROUP_DEBUG
{
.name = "bfq.time_recursive",
.private = offsetof(struct bfq_group, stats.time),
@@ -1254,7 +1253,7 @@ struct cftype bfq_blkcg_legacy_files[] = {
.private = offsetof(struct bfq_group, stats.dequeue),
.seq_show = bfqg_print_stat,
},
#endif /* CONFIG_DEBUG_BLK_CGROUP */
#endif /* CONFIG_BFQ_CGROUP_DEBUG */
{ } /* terminate */
};

8
block/bfq-iosched.c
View File

@@ -4404,7 +4404,7 @@ exit:
return rq;
}
#if defined(CONFIG_BFQ_GROUP_IOSCHED) && defined(CONFIG_DEBUG_BLK_CGROUP)
#ifdef CONFIG_BFQ_CGROUP_DEBUG
static void bfq_update_dispatch_stats(struct request_queue *q,
struct request *rq,
struct bfq_queue *in_serv_queue,
@@ -4454,7 +4454,7 @@ static inline void bfq_update_dispatch_stats(struct request_queue *q,
struct request *rq,
struct bfq_queue *in_serv_queue,
bool idle_timer_disabled) {}
#endif
#endif /* CONFIG_BFQ_CGROUP_DEBUG */
static struct request *bfq_dispatch_request(struct blk_mq_hw_ctx *hctx)
{
@@ -5008,7 +5008,7 @@ static bool __bfq_insert_request(struct bfq_data *bfqd, struct request *rq)
return idle_timer_disabled;
}
#if defined(CONFIG_BFQ_GROUP_IOSCHED) && defined(CONFIG_DEBUG_BLK_CGROUP)
#ifdef CONFIG_BFQ_CGROUP_DEBUG
static void bfq_update_insert_stats(struct request_queue *q,
struct bfq_queue *bfqq,
bool idle_timer_disabled,
@@ -5038,7 +5038,7 @@ static inline void bfq_update_insert_stats(struct request_queue *q,
struct bfq_queue *bfqq,
bool idle_timer_disabled,
unsigned int cmd_flags) {}
#endif
#endif /* CONFIG_BFQ_CGROUP_DEBUG */
static void bfq_insert_request(struct blk_mq_hw_ctx *hctx, struct request *rq,
bool at_head)

4
block/bfq-iosched.h
View File

@@ -783,7 +783,7 @@ struct bfq_stat {
};
struct bfqg_stats {
#if defined(CONFIG_BFQ_GROUP_IOSCHED) && defined(CONFIG_DEBUG_BLK_CGROUP)
#ifdef CONFIG_BFQ_CGROUP_DEBUG
/* number of ios merged */
struct blkg_rwstat merged;
/* total time spent on device in ns, may not be accurate w/ queueing */
@@ -811,7 +811,7 @@ struct bfqg_stats {
u64 start_idle_time;
u64 start_empty_time;
uint16_t flags;
#endif /* CONFIG_BFQ_GROUP_IOSCHED && CONFIG_DEBUG_BLK_CGROUP */
#endif /* CONFIG_BFQ_CGROUP_DEBUG */
};
#ifdef CONFIG_BFQ_GROUP_IOSCHED