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authorGu Zheng <guz.fnst@cn.fujitsu.com>2014-11-24 06:05:25 +0300
committerJens Axboe <axboe@fb.com>2014-11-24 18:05:14 +0300
commit244808543e6e9b46ea1135589877f4d4bd2925c5 (patch)
treeea635e668b4839643a0bb08a897254142ee41219 /drivers/block
parentaae4933da9488827d341c31b970b2f62ac45a496 (diff)
downloadlinux-244808543e6e9b46ea1135589877f4d4bd2925c5.tar.xz
drbd: use generic io stats accounting functions to simplify io stat accounting
Use generic io stats accounting help functions (generic_{start,end}_io_acct) to simplify io stat accounting. Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/drbd/drbd_req.c22
1 files changed, 4 insertions, 18 deletions
diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index 3b797cd5a407..34f2f0ba409b 100644
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -36,29 +36,15 @@ static bool drbd_may_do_local_read(struct drbd_device *device, sector_t sector,
/* Update disk stats at start of I/O request */
static void _drbd_start_io_acct(struct drbd_device *device, struct drbd_request *req)
{
- const int rw = bio_data_dir(req->master_bio);
- int cpu;
- cpu = part_stat_lock();
- part_round_stats(cpu, &device->vdisk->part0);
- part_stat_inc(cpu, &device->vdisk->part0, ios[rw]);
- part_stat_add(cpu, &device->vdisk->part0, sectors[rw], req->i.size >> 9);
- (void) cpu; /* The macro invocations above want the cpu argument, I do not like
- the compiler warning about cpu only assigned but never used... */
- part_inc_in_flight(&device->vdisk->part0, rw);
- part_stat_unlock();
+ generic_start_io_acct(bio_data_dir(req->master_bio), req->i.size >> 9,
+ &device->vdisk->part0);
}
/* Update disk stats when completing request upwards */
static void _drbd_end_io_acct(struct drbd_device *device, struct drbd_request *req)
{
- int rw = bio_data_dir(req->master_bio);
- unsigned long duration = jiffies - req->start_jif;
- int cpu;
- cpu = part_stat_lock();
- part_stat_add(cpu, &device->vdisk->part0, ticks[rw], duration);
- part_round_stats(cpu, &device->vdisk->part0);
- part_dec_in_flight(&device->vdisk->part0, rw);
- part_stat_unlock();
+ generic_end_io_acct(bio_data_dir(req->master_bio),
+ &device->vdisk->part0, req->start_jif);
}
static struct drbd_request *drbd_req_new(struct drbd_device *device,