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-rw-r--r--drivers/block/aoe/aoecmd.c13
-rw-r--r--drivers/block/elevator.c7
-rw-r--r--drivers/block/genhd.c29
-rw-r--r--drivers/block/ll_rw_blk.c47
4 files changed, 41 insertions, 55 deletions
diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index 5c9c7c1..326ca38 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -468,16 +468,11 @@ aoecmd_ata_rsp(struct sk_buff *skb)
unsigned long duration = jiffies - buf->start_time;
unsigned long n_sect = buf->bio->bi_size >> 9;
struct gendisk *disk = d->gd;
+ const int rw = bio_data_dir(buf->bio);
- if (bio_data_dir(buf->bio) == WRITE) {
- disk_stat_inc(disk, writes);
- disk_stat_add(disk, write_ticks, duration);
- disk_stat_add(disk, write_sectors, n_sect);
- } else {
- disk_stat_inc(disk, reads);
- disk_stat_add(disk, read_ticks, duration);
- disk_stat_add(disk, read_sectors, n_sect);
- }
+ disk_stat_inc(disk, ios[rw]);
+ disk_stat_add(disk, ticks[rw], duration);
+ disk_stat_add(disk, sectors[rw], n_sect);
disk_stat_add(disk, io_ticks, duration);
n = (buf->flags & BUFFL_FAIL) ? -EIO : 0;
bio_endio(buf->bio, buf->bio->bi_size, n);
diff --git a/drivers/block/elevator.c b/drivers/block/elevator.c
index 36f1057..d4a49a3 100644
--- a/drivers/block/elevator.c
+++ b/drivers/block/elevator.c
@@ -369,9 +369,14 @@ void __elv_add_request(request_queue_t *q, struct request *rq, int where,
case ELEVATOR_INSERT_SORT:
BUG_ON(!blk_fs_request(rq));
rq->flags |= REQ_SORTED;
- q->elevator->ops->elevator_add_req_fn(q, rq);
if (q->last_merge == NULL && rq_mergeable(rq))
q->last_merge = rq;
+ /*
+ * Some ioscheds (cfq) run q->request_fn directly, so
+ * rq cannot be accessed after calling
+ * elevator_add_req_fn.
+ */
+ q->elevator->ops->elevator_add_req_fn(q, rq);
break;
default:
diff --git a/drivers/block/genhd.c b/drivers/block/genhd.c
index 486ce1f..54aec4a 100644
--- a/drivers/block/genhd.c
+++ b/drivers/block/genhd.c
@@ -391,13 +391,12 @@ static ssize_t disk_stats_read(struct gendisk * disk, char *page)
"%8u %8u %8llu %8u "
"%8u %8u %8u"
"\n",
- disk_stat_read(disk, reads), disk_stat_read(disk, read_merges),
- (unsigned long long)disk_stat_read(disk, read_sectors),
- jiffies_to_msecs(disk_stat_read(disk, read_ticks)),
- disk_stat_read(disk, writes),
- disk_stat_read(disk, write_merges),
- (unsigned long long)disk_stat_read(disk, write_sectors),
- jiffies_to_msecs(disk_stat_read(disk, write_ticks)),
+ disk_stat_read(disk, ios[0]), disk_stat_read(disk, merges[0]),
+ (unsigned long long)disk_stat_read(disk, sectors[0]),
+ jiffies_to_msecs(disk_stat_read(disk, ticks[0])),
+ disk_stat_read(disk, ios[1]), disk_stat_read(disk, merges[1]),
+ (unsigned long long)disk_stat_read(disk, sectors[1]),
+ jiffies_to_msecs(disk_stat_read(disk, ticks[1])),
disk->in_flight,
jiffies_to_msecs(disk_stat_read(disk, io_ticks)),
jiffies_to_msecs(disk_stat_read(disk, time_in_queue)));
@@ -583,12 +582,12 @@ static int diskstats_show(struct seq_file *s, void *v)
preempt_enable();
seq_printf(s, "%4d %4d %s %u %u %llu %u %u %u %llu %u %u %u %u\n",
gp->major, n + gp->first_minor, disk_name(gp, n, buf),
- disk_stat_read(gp, reads), disk_stat_read(gp, read_merges),
- (unsigned long long)disk_stat_read(gp, read_sectors),
- jiffies_to_msecs(disk_stat_read(gp, read_ticks)),
- disk_stat_read(gp, writes), disk_stat_read(gp, write_merges),
- (unsigned long long)disk_stat_read(gp, write_sectors),
- jiffies_to_msecs(disk_stat_read(gp, write_ticks)),
+ disk_stat_read(gp, ios[0]), disk_stat_read(gp, merges[0]),
+ (unsigned long long)disk_stat_read(gp, sectors[0]),
+ jiffies_to_msecs(disk_stat_read(gp, ticks[0])),
+ disk_stat_read(gp, ios[1]), disk_stat_read(gp, merges[1]),
+ (unsigned long long)disk_stat_read(gp, sectors[1]),
+ jiffies_to_msecs(disk_stat_read(gp, ticks[1])),
gp->in_flight,
jiffies_to_msecs(disk_stat_read(gp, io_ticks)),
jiffies_to_msecs(disk_stat_read(gp, time_in_queue)));
@@ -601,8 +600,8 @@ static int diskstats_show(struct seq_file *s, void *v)
seq_printf(s, "%4d %4d %s %u %u %u %u\n",
gp->major, n + gp->first_minor + 1,
disk_name(gp, n + 1, buf),
- hd->reads, hd->read_sectors,
- hd->writes, hd->write_sectors);
+ hd->ios[0], hd->sectors[0],
+ hd->ios[1], hd->sectors[1]);
}
return 0;
diff --git a/drivers/block/ll_rw_blk.c b/drivers/block/ll_rw_blk.c
index 0af7351..2747741 100644
--- a/drivers/block/ll_rw_blk.c
+++ b/drivers/block/ll_rw_blk.c
@@ -2387,16 +2387,9 @@ static void drive_stat_acct(struct request *rq, int nr_sectors, int new_io)
if (!blk_fs_request(rq) || !rq->rq_disk)
return;
- if (rw == READ) {
- __disk_stat_add(rq->rq_disk, read_sectors, nr_sectors);
- if (!new_io)
- __disk_stat_inc(rq->rq_disk, read_merges);
- } else if (rw == WRITE) {
- __disk_stat_add(rq->rq_disk, write_sectors, nr_sectors);
- if (!new_io)
- __disk_stat_inc(rq->rq_disk, write_merges);
- }
- if (new_io) {
+ if (!new_io) {
+ __disk_stat_inc(rq->rq_disk, merges[rw]);
+ } else {
disk_round_stats(rq->rq_disk);
rq->rq_disk->in_flight++;
}
@@ -2791,17 +2784,11 @@ static inline void blk_partition_remap(struct bio *bio)
if (bdev != bdev->bd_contains) {
struct hd_struct *p = bdev->bd_part;
+ const int rw = bio_data_dir(bio);
+
+ p->sectors[rw] += bio_sectors(bio);
+ p->ios[rw]++;
- switch (bio_data_dir(bio)) {
- case READ:
- p->read_sectors += bio_sectors(bio);
- p->reads++;
- break;
- case WRITE:
- p->write_sectors += bio_sectors(bio);
- p->writes++;
- break;
- }
bio->bi_sector += p->start_sect;
bio->bi_bdev = bdev->bd_contains;
}
@@ -3048,6 +3035,12 @@ static int __end_that_request_first(struct request *req, int uptodate,
(unsigned long long)req->sector);
}
+ if (blk_fs_request(req) && req->rq_disk) {
+ const int rw = rq_data_dir(req);
+
+ __disk_stat_add(req->rq_disk, sectors[rw], nr_bytes >> 9);
+ }
+
total_bytes = bio_nbytes = 0;
while ((bio = req->bio) != NULL) {
int nbytes;
@@ -3176,16 +3169,10 @@ void end_that_request_last(struct request *req)
if (disk && blk_fs_request(req)) {
unsigned long duration = jiffies - req->start_time;
- switch (rq_data_dir(req)) {
- case WRITE:
- __disk_stat_inc(disk, writes);
- __disk_stat_add(disk, write_ticks, duration);
- break;
- case READ:
- __disk_stat_inc(disk, reads);
- __disk_stat_add(disk, read_ticks, duration);
- break;
- }
+ const int rw = rq_data_dir(req);
+
+ __disk_stat_inc(disk, ios[rw]);
+ __disk_stat_add(disk, ticks[rw], duration);
disk_round_stats(disk);
disk->in_flight--;
}
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