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-rw-r--r--block/blk-core.c52
-rw-r--r--block/blk-merge.c11
-rw-r--r--block/genhd.c20
3 files changed, 44 insertions, 39 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index d6128d9ad60..e0a5ee36849 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -56,25 +56,26 @@ static void drive_stat_acct(struct request *rq, int new_io)
{
struct hd_struct *part;
int rw = rq_data_dir(rq);
+ int cpu;
if (!blk_fs_request(rq) || !rq->rq_disk)
return;
- rcu_read_lock();
-
+ cpu = disk_stat_lock();
part = disk_map_sector_rcu(rq->rq_disk, rq->sector);
+
if (!new_io)
- __all_stat_inc(rq->rq_disk, part, merges[rw], rq->sector);
+ all_stat_inc(cpu, rq->rq_disk, part, merges[rw], rq->sector);
else {
- disk_round_stats(rq->rq_disk);
+ disk_round_stats(cpu, rq->rq_disk);
rq->rq_disk->in_flight++;
if (part) {
- part_round_stats(part);
+ part_round_stats(cpu, part);
part->in_flight++;
}
}
- rcu_read_unlock();
+ disk_stat_unlock();
}
void blk_queue_congestion_threshold(struct request_queue *q)
@@ -997,7 +998,7 @@ static inline void add_request(struct request_queue *q, struct request *req)
* /proc/diskstats. This accounts immediately for all queue usage up to
* the current jiffies and restarts the counters again.
*/
-void disk_round_stats(struct gendisk *disk)
+void disk_round_stats(int cpu, struct gendisk *disk)
{
unsigned long now = jiffies;
@@ -1005,15 +1006,15 @@ void disk_round_stats(struct gendisk *disk)
return;
if (disk->in_flight) {
- __disk_stat_add(disk, time_in_queue,
- disk->in_flight * (now - disk->stamp));
- __disk_stat_add(disk, io_ticks, (now - disk->stamp));
+ disk_stat_add(cpu, disk, time_in_queue,
+ disk->in_flight * (now - disk->stamp));
+ disk_stat_add(cpu, disk, io_ticks, (now - disk->stamp));
}
disk->stamp = now;
}
EXPORT_SYMBOL_GPL(disk_round_stats);
-void part_round_stats(struct hd_struct *part)
+void part_round_stats(int cpu, struct hd_struct *part)
{
unsigned long now = jiffies;
@@ -1021,9 +1022,9 @@ void part_round_stats(struct hd_struct *part)
return;
if (part->in_flight) {
- __part_stat_add(part, time_in_queue,
- part->in_flight * (now - part->stamp));
- __part_stat_add(part, io_ticks, (now - part->stamp));
+ part_stat_add(cpu, part, time_in_queue,
+ part->in_flight * (now - part->stamp));
+ part_stat_add(cpu, part, io_ticks, (now - part->stamp));
}
part->stamp = now;
}
@@ -1563,12 +1564,13 @@ static int __end_that_request_first(struct request *req, int error,
if (blk_fs_request(req) && req->rq_disk) {
const int rw = rq_data_dir(req);
struct hd_struct *part;
+ int cpu;
- rcu_read_lock();
+ cpu = disk_stat_lock();
part = disk_map_sector_rcu(req->rq_disk, req->sector);
- all_stat_add(req->rq_disk, part, sectors[rw],
- nr_bytes >> 9, req->sector);
- rcu_read_unlock();
+ all_stat_add(cpu, req->rq_disk, part, sectors[rw],
+ nr_bytes >> 9, req->sector);
+ disk_stat_unlock();
}
total_bytes = bio_nbytes = 0;
@@ -1753,21 +1755,21 @@ static void end_that_request_last(struct request *req, int error)
unsigned long duration = jiffies - req->start_time;
const int rw = rq_data_dir(req);
struct hd_struct *part;
+ int cpu;
- rcu_read_lock();
-
+ cpu = disk_stat_lock();
part = disk_map_sector_rcu(disk, req->sector);
- __all_stat_inc(disk, part, ios[rw], req->sector);
- __all_stat_add(disk, part, ticks[rw], duration, req->sector);
- disk_round_stats(disk);
+ all_stat_inc(cpu, disk, part, ios[rw], req->sector);
+ all_stat_add(cpu, disk, part, ticks[rw], duration, req->sector);
+ disk_round_stats(cpu, disk);
disk->in_flight--;
if (part) {
- part_round_stats(part);
+ part_round_stats(cpu, part);
part->in_flight--;
}
- rcu_read_unlock();
+ disk_stat_unlock();
}
if (req->end_io)
diff --git a/block/blk-merge.c b/block/blk-merge.c
index eb2a3ca5830..d926a24bf1f 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -388,18 +388,19 @@ static int attempt_merge(struct request_queue *q, struct request *req,
if (req->rq_disk) {
struct hd_struct *part;
+ int cpu;
- rcu_read_lock();
-
+ cpu = disk_stat_lock();
part = disk_map_sector_rcu(req->rq_disk, req->sector);
- disk_round_stats(req->rq_disk);
+
+ disk_round_stats(cpu, req->rq_disk);
req->rq_disk->in_flight--;
if (part) {
- part_round_stats(part);
+ part_round_stats(cpu, part);
part->in_flight--;
}
- rcu_read_unlock();
+ disk_stat_unlock();
}
req->ioprio = ioprio_best(req->ioprio, next->ioprio);
diff --git a/block/genhd.c b/block/genhd.c
index b431d654394..430626e440f 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -633,10 +633,11 @@ static ssize_t disk_stat_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gendisk *disk = dev_to_disk(dev);
+ int cpu;
- preempt_disable();
- disk_round_stats(disk);
- preempt_enable();
+ cpu = disk_stat_lock();
+ disk_round_stats(cpu, disk);
+ disk_stat_unlock();
return sprintf(buf,
"%8lu %8lu %8llu %8u "
"%8lu %8lu %8llu %8u "
@@ -749,6 +750,7 @@ static int diskstats_show(struct seq_file *seqf, void *v)
struct disk_part_iter piter;
struct hd_struct *hd;
char buf[BDEVNAME_SIZE];
+ int cpu;
/*
if (&gp->dev.kobj.entry == block_class.devices.next)
@@ -758,9 +760,9 @@ static int diskstats_show(struct seq_file *seqf, void *v)
"\n\n");
*/
- preempt_disable();
- disk_round_stats(gp);
- preempt_enable();
+ cpu = disk_stat_lock();
+ disk_round_stats(cpu, gp);
+ disk_stat_unlock();
seq_printf(seqf, "%4d %4d %s %lu %lu %llu %u %lu %lu %llu %u %u %u %u\n",
MAJOR(disk_devt(gp)), MINOR(disk_devt(gp)),
disk_name(gp, 0, buf),
@@ -777,9 +779,9 @@ static int diskstats_show(struct seq_file *seqf, void *v)
/* now show all non-0 size partitions of it */
disk_part_iter_init(&piter, gp, 0);
while ((hd = disk_part_iter_next(&piter))) {
- preempt_disable();
- part_round_stats(hd);
- preempt_enable();
+ cpu = disk_stat_lock();
+ part_round_stats(cpu, hd);
+ disk_stat_unlock();
seq_printf(seqf, "%4d %4d %s %lu %lu %llu "
"%u %lu %lu %llu %u %u %u %u\n",
MAJOR(part_devt(hd)), MINOR(part_devt(hd)),
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-18 17:01:01 +0000