diff options
Diffstat (limited to 'drivers/md/dm.c')
| -rw-r--r-- | drivers/md/dm.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index a78caad2999..653624792ea 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -377,12 +377,13 @@ static void free_tio(struct mapped_device *md, struct dm_target_io *tio) static void start_io_acct(struct dm_io *io) { struct mapped_device *md = io->md; + int cpu; io->start_time = jiffies; - preempt_disable(); - disk_round_stats(dm_disk(md)); - preempt_enable(); + cpu = disk_stat_lock(); + disk_round_stats(cpu, dm_disk(md)); + disk_stat_unlock(); dm_disk(md)->in_flight = atomic_inc_return(&md->pending); } @@ -391,15 +392,15 @@ static int end_io_acct(struct dm_io *io) struct mapped_device *md = io->md; struct bio *bio = io->bio; unsigned long duration = jiffies - io->start_time; - int pending; + int pending, cpu; int rw = bio_data_dir(bio); - preempt_disable(); - disk_round_stats(dm_disk(md)); - preempt_enable(); - dm_disk(md)->in_flight = pending = atomic_dec_return(&md->pending); + cpu = disk_stat_lock(); + disk_round_stats(cpu, dm_disk(md)); + disk_stat_add(cpu, dm_disk(md), ticks[rw], duration); + disk_stat_unlock(); - disk_stat_add(dm_disk(md), ticks[rw], duration); + dm_disk(md)->in_flight = pending = atomic_dec_return(&md->pending); return !pending; } @@ -885,6 +886,7 @@ static int dm_request(struct request_queue *q, struct bio *bio) int r = -EIO; int rw = bio_data_dir(bio); struct mapped_device *md = q->queuedata; + int cpu; /* * There is no use in forwarding any barrier request since we can't @@ -897,8 +899,10 @@ static int dm_request(struct request_queue *q, struct bio *bio) down_read(&md->io_lock); - disk_stat_inc(dm_disk(md), ios[rw]); - disk_stat_add(dm_disk(md), sectors[rw], bio_sectors(bio)); + cpu = disk_stat_lock(); + disk_stat_inc(cpu, dm_disk(md), ios[rw]); + disk_stat_add(cpu, dm_disk(md), sectors[rw], bio_sectors(bio)); + disk_stat_unlock(); /* * If we're suspended we have to queue |