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drbd: prepare to queue write requests on a submit worker

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Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Lars Ellenberg
2013-03-22 18:14:40 -06:00
committed by Jens Axboe
parent 6d9febe237
commit 113fef9e20
4 changed files with 68 additions and 1 deletions
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drivers/block/drbd/drbd_req.c
+29
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@@ -1160,6 +1160,35 @@ void __drbd_make_request(struct drbd_conf *mdev, struct bio *bio, unsigned long
drbd_send_and_submit(mdev, req);
}
void __drbd_make_request_from_worker(struct drbd_conf *mdev, struct drbd_request *req)
{
const int rw = bio_rw(req->master_bio);
if (rw == WRITE && req->private_bio && req->i.size
&& !test_bit(AL_SUSPENDED, &mdev->flags)) {
drbd_al_begin_io(mdev, &req->i, false);
req->rq_state |= RQ_IN_ACT_LOG;
}
drbd_send_and_submit(mdev, req);
}
void do_submit(struct work_struct *ws)
{
struct drbd_conf *mdev = container_of(ws, struct drbd_conf, submit.worker);
LIST_HEAD(writes);
struct drbd_request *req, *tmp;
spin_lock(&mdev->submit.lock);
list_splice_init(&mdev->submit.writes, &writes);
spin_unlock(&mdev->submit.lock);
list_for_each_entry_safe(req, tmp, &writes, tl_requests) {
list_del_init(&req->tl_requests);
__drbd_make_request_from_worker(mdev, req);
}
}
void drbd_make_request(struct request_queue *q, struct bio *bio)
{
struct drbd_conf *mdev = (struct drbd_conf *) q->queuedata;