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drbd: Consider that read requests could be NEG_ACKEDed 

ap_in_flight only counts writes. NEG_ACKED is an action
on a request that might be called for reads and writes.

This bug was there forever, but it becomes much more
relevant with the read balincing code.

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 2011-12-13 11:36:57 +01:00
parent 6ab9b1b60b
commit e8cdc34335
1 changed files with 2 additions and 1 deletions
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3
drivers/block/drbd/drbd_req.c
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@ -628,7 +628,8 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
/* assert something? */
if (req->rq_state & RQ_NET_PENDING) {
dec_ap_pending(mdev);
atomic_sub(req->i.size >> 9, &mdev->ap_in_flight);
if (req->rq_state & RQ_WRITE)
atomic_sub(req->i.size >> 9, &mdev->ap_in_flight);
}
req->rq_state &= ~(RQ_NET_OK|RQ_NET_PENDING);