diff mbox series

[v2,4/5] blk-mq: update driver tags request table when start request

Message ID 20230913151616.3164338-5-chengming.zhou@linux.dev (mailing list archive)
State New, archived
Headers show
Series blk-mq: optimize queue_rqs() support | expand

Commit Message

Chengming Zhou Sept. 13, 2023, 3:16 p.m. UTC 
From: Chengming Zhou <zhouchengming@bytedance.com>

Now we update driver tags request table in blk_mq_get_driver_tag(),
so the driver that support queue_rqs() have to update that inflight
table by itself.

Move it to blk_mq_start_request(), which is a better place where
we setup the deadline for request timeout check. And it's just
where the request becomes inflight.

Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
---
 block/blk-mq.c             | 1 +
 block/blk-mq.h             | 3 ---
 drivers/block/virtio_blk.c | 2 --
 drivers/nvme/host/pci.c    | 1 -
 4 files changed, 1 insertion(+), 6 deletions(-)

Comments

Ming Lei Sept. 22, 2023, 8:49 a.m. UTC | #1 
On Wed, Sep 13, 2023 at 03:16:15PM +0000, chengming.zhou@linux.dev wrote:
> From: Chengming Zhou <zhouchengming@bytedance.com>
> 
> Now we update driver tags request table in blk_mq_get_driver_tag(),
> so the driver that support queue_rqs() have to update that inflight
> table by itself.
> 
> Move it to blk_mq_start_request(), which is a better place where
> we setup the deadline for request timeout check. And it's just
> where the request becomes inflight.
> 
> Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
> ---

Reviewed-by: Ming Lei <ming.lei@redhat.com>

Thanks
Ming
diff mbox series

Patch

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 68ce9357463b..e2d11183f62e 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1259,6 +1259,7 @@  void blk_mq_start_request(struct request *rq)
 
 	blk_add_timer(rq);
 	WRITE_ONCE(rq->state, MQ_RQ_IN_FLIGHT);
+	rq->mq_hctx->tags->rqs[rq->tag] = rq;
 
 #ifdef CONFIG_BLK_DEV_INTEGRITY
 	if (blk_integrity_rq(rq) && req_op(rq) == REQ_OP_WRITE)
diff --git a/block/blk-mq.h b/block/blk-mq.h
index 560a76df290a..f75a9ecfebde 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -351,12 +351,9 @@  bool __blk_mq_alloc_driver_tag(struct request *rq);
 
 static inline bool blk_mq_get_driver_tag(struct request *rq)
 {
-	struct blk_mq_hw_ctx *hctx = rq->mq_hctx;
-
 	if (rq->tag == BLK_MQ_NO_TAG && !__blk_mq_alloc_driver_tag(rq))
 		return false;
 
-	hctx->tags->rqs[rq->tag] = rq;
 	return true;
 }
 
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 1fe011676d07..4689ac2e0c0e 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -470,8 +470,6 @@  static bool virtblk_prep_rq_batch(struct request *req)
 	struct virtio_blk *vblk = req->mq_hctx->queue->queuedata;
 	struct virtblk_req *vbr = blk_mq_rq_to_pdu(req);
 
-	req->mq_hctx->tags->rqs[req->tag] = req;
-
 	return virtblk_prep_rq(req->mq_hctx, vblk, req, vbr) == BLK_STS_OK;
 }
 
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 2f57da12d983..c2e942808eff 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -924,7 +924,6 @@  static bool nvme_prep_rq_batch(struct nvme_queue *nvmeq, struct request *req)
 	if (unlikely(!nvme_check_ready(&nvmeq->dev->ctrl, req, true)))
 		return false;
 
-	req->mq_hctx->tags->rqs[req->tag] = req;
 	return nvme_prep_rq(nvmeq->dev, req) == BLK_STS_OK;
 }