From 244808543e6e9b46ea1135589877f4d4bd2925c5 Mon Sep 17 00:00:00 2001 From: Gu Zheng Date: Mon, 24 Nov 2014 11:05:25 +0800 Subject: [PATCH] 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 Signed-off-by: Jens Axboe --- drivers/block/drbd/drbd_req.c | 22 ++++------------------ 1 file 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, -- 2.30.2