On 10/11/16 09:46, Christoph Hellwig wrote:
On Wed, Sep 28, 2016 at 05:01:45PM -0700, Bart Van Assche wrote:
Avoid that nvme_queue_rq() is still running when nvme_stop_queues()
returns. Untested.
Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
Cc: Keith Busch <keith.busch@xxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Sagi Grimberg <sagi@xxxxxxxxxxx>
---
drivers/nvme/host/core.c | 20 ++++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index d791fba..98f1f29 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -201,13 +201,9 @@ fail:
void nvme_requeue_req(struct request *req)
{
- unsigned long flags;
-
blk_mq_requeue_request(req);
- spin_lock_irqsave(req->q->queue_lock, flags);
- if (!blk_mq_queue_stopped(req->q))
- blk_mq_kick_requeue_list(req->q);
- spin_unlock_irqrestore(req->q->queue_lock, flags);
+ WARN_ON_ONCE(blk_mq_queue_stopped(req->q));
+ blk_mq_kick_requeue_list(req->q);
}
EXPORT_SYMBOL_GPL(nvme_requeue_req);
Can we just add a 'bool kick' argument to blk_mq_requeue_request and
move all this handling to the core?
Hello Christoph,
That sounds like a good idea to me. Thanks also for the other review
comments you posted on this patch series. I will rework patch 6/7 such
that the code for waiting is moved into the SCSI core.
Bart.
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