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drbd: Begin to account BIO processing time before inc_ap_bio() 

Since inc_ap_bio() might sleep already

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Philipp Reisner 2010-11-09 17:45:06 +01:00
parent f91ab6282d
commit aeda1cd6a5
2 changed files with 8 additions and 5 deletions
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12
drivers/block/drbd/drbd_req.c
View File

@ -757,7 +757,7 @@ static int drbd_may_do_local_read(struct drbd_conf *mdev, sector_t sector, int s
return 0 == drbd_bm_count_bits(mdev, sbnr, ebnr);
}
static int drbd_make_request_common(struct drbd_conf *mdev, struct bio *bio)
static int drbd_make_request_common(struct drbd_conf *mdev, struct bio *bio, unsigned long start_time)
{
const int rw = bio_rw(bio);
const int size = bio->bi_size;
@ -778,6 +778,7 @@ static int drbd_make_request_common(struct drbd_conf *mdev, struct bio *bio)
bio_endio(bio, -ENOMEM);
return 0;
}
req->start_time = start_time;
local = get_ldev(mdev);
if (!local) {
@ -1076,12 +1077,15 @@ int drbd_make_request_26(struct request_queue *q, struct bio *bio)
{
unsigned int s_enr, e_enr;
struct drbd_conf *mdev = (struct drbd_conf *) q->queuedata;
unsigned long start_time;
if (drbd_fail_request_early(mdev, bio_data_dir(bio) & WRITE)) {
bio_endio(bio, -EPERM);
return 0;
}
start_time = jiffies;
/*
* what we "blindly" assume:
*/
@ -1096,7 +1100,7 @@ int drbd_make_request_26(struct request_queue *q, struct bio *bio)
if (likely(s_enr == e_enr)) {
inc_ap_bio(mdev, 1);
return drbd_make_request_common(mdev, bio);
return drbd_make_request_common(mdev, bio, start_time);
}
/* can this bio be split generically?
@ -1138,10 +1142,10 @@ int drbd_make_request_26(struct request_queue *q, struct bio *bio)
D_ASSERT(e_enr == s_enr + 1);
while (drbd_make_request_common(mdev, &bp->bio1))
while (drbd_make_request_common(mdev, &bp->bio1, start_time))
inc_ap_bio(mdev, 1);
while (drbd_make_request_common(mdev, &bp->bio2))
while (drbd_make_request_common(mdev, &bp->bio2, start_time))
inc_ap_bio(mdev, 1);
dec_ap_bio(mdev);

1
drivers/block/drbd/drbd_req.h
View File

@ -291,7 +291,6 @@ static inline struct drbd_request *drbd_req_new(struct drbd_conf *mdev,
req->epoch = 0;
req->sector = bio_src->bi_sector;
req->size = bio_src->bi_size;
req->start_time = jiffies;
INIT_HLIST_NODE(&req->colision);
INIT_LIST_HEAD(&req->tl_requests);
INIT_LIST_HEAD(&req->w.list);