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authorOmar Sandoval <osandov@fb.com>2018-04-26 00:21:59 -0700
committerJens Axboe <axboe@kernel.dk>2018-04-26 09:02:01 -0600
commitbf0ddaba65ddbb2715af97041da8e7a45b2d8628 (patch)
tree42ecea860351829817753e8ce2c4205a8aaff8b1 /block
parent6131837b1de66116459ef4413e26fdbc70d066dc (diff)
downloadlinux-0-day-bf0ddaba65ddbb2715af97041da8e7a45b2d8628.tar.gz
blk-mq: fix sysfs inflight counter
When the blk-mq inflight implementation was added, /proc/diskstats was converted to use it, but /sys/block/$dev/inflight was not. Fix it by adding another helper to count in-flight requests by data direction. Fixes: f299b7c7a9de ("blk-mq: provide internal in-flight variant") Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-mq.c19
-rw-r--r--block/blk-mq.h4
-rw-r--r--block/genhd.c12
-rw-r--r--block/partition-generic.c10
4 files changed, 40 insertions, 5 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 5450cbc..9ce9cac 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -115,6 +115,25 @@ void blk_mq_in_flight(struct request_queue *q, struct hd_struct *part,
blk_mq_queue_tag_busy_iter(q, blk_mq_check_inflight, &mi);
}
+static void blk_mq_check_inflight_rw(struct blk_mq_hw_ctx *hctx,
+ struct request *rq, void *priv,
+ bool reserved)
+{
+ struct mq_inflight *mi = priv;
+
+ if (rq->part == mi->part)
+ mi->inflight[rq_data_dir(rq)]++;
+}
+
+void blk_mq_in_flight_rw(struct request_queue *q, struct hd_struct *part,
+ unsigned int inflight[2])
+{
+ struct mq_inflight mi = { .part = part, .inflight = inflight, };
+
+ inflight[0] = inflight[1] = 0;
+ blk_mq_queue_tag_busy_iter(q, blk_mq_check_inflight_rw, &mi);
+}
+
void blk_freeze_queue_start(struct request_queue *q)
{
int freeze_depth;
diff --git a/block/blk-mq.h b/block/blk-mq.h
index 89b5cd3..e1bb420 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -188,7 +188,9 @@ static inline bool blk_mq_hw_queue_mapped(struct blk_mq_hw_ctx *hctx)
}
void blk_mq_in_flight(struct request_queue *q, struct hd_struct *part,
- unsigned int inflight[2]);
+ unsigned int inflight[2]);
+void blk_mq_in_flight_rw(struct request_queue *q, struct hd_struct *part,
+ unsigned int inflight[2]);
static inline void blk_mq_put_dispatch_budget(struct blk_mq_hw_ctx *hctx)
{
diff --git a/block/genhd.c b/block/genhd.c
index dc7e089..c4513fe 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -82,6 +82,18 @@ void part_in_flight(struct request_queue *q, struct hd_struct *part,
}
}
+void part_in_flight_rw(struct request_queue *q, struct hd_struct *part,
+ unsigned int inflight[2])
+{
+ if (q->mq_ops) {
+ blk_mq_in_flight_rw(q, part, inflight);
+ return;
+ }
+
+ inflight[0] = atomic_read(&part->in_flight[0]);
+ inflight[1] = atomic_read(&part->in_flight[1]);
+}
+
struct hd_struct *__disk_get_part(struct gendisk *disk, int partno)
{
struct disk_part_tbl *ptbl = rcu_dereference(disk->part_tbl);
diff --git a/block/partition-generic.c b/block/partition-generic.c
index 08dabcd..db57cce 100644
--- a/block/partition-generic.c
+++ b/block/partition-generic.c
@@ -145,13 +145,15 @@ ssize_t part_stat_show(struct device *dev,
jiffies_to_msecs(part_stat_read(p, time_in_queue)));
}
-ssize_t part_inflight_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+ssize_t part_inflight_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
struct hd_struct *p = dev_to_part(dev);
+ struct request_queue *q = part_to_disk(p)->queue;
+ unsigned int inflight[2];
- return sprintf(buf, "%8u %8u\n", atomic_read(&p->in_flight[0]),
- atomic_read(&p->in_flight[1]));
+ part_in_flight_rw(q, p, inflight);
+ return sprintf(buf, "%8u %8u\n", inflight[0], inflight[1]);
}
#ifdef CONFIG_FAIL_MAKE_REQUEST