* [PATCH] nvme: reset disk to the mpath node also when requeuing
@ 2021-06-02 12:34 Daniel Wagner
2021-06-02 12:49 ` Daniel Wagner
0 siblings, 1 reply; 2+ messages in thread
From: Daniel Wagner @ 2021-06-02 12:34 UTC (permalink / raw)
To: linux-nvme
Cc: linux-kernel, Keith Busch, Jens Axboe, Christoph Hellwig,
Sagi Grimberg, Daniel Wagner
Commit ce86dad222e9 ("nvme-multipath: reset bdev to ns head when
failover") moved the reset code where the bio is added to the
requeue_list for the failover path. But it left the original
bio_set_dev() in nvme_requeue_work().
Let's move the bio_set_dev() where we add the bio to the requeue_list
and avoid the double setting in case of the failover path. And this
makes the code more consistent.
Signed-off-by: Daniel Wagner <dwagner@suse.de>
---
drivers/nvme/host/multipath.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 127a17b4c13d..df07fc2ad7bc 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -324,6 +324,7 @@ static blk_qc_t nvme_ns_head_submit_bio(struct bio *bio)
dev_warn_ratelimited(dev, "no usable path - requeuing I/O\n");
spin_lock_irq(&head->requeue_lock);
+ bio_set_dev(bio, head->disk->part0);
bio_list_add(&head->requeue_list, bio);
spin_unlock_irq(&head->requeue_lock);
} else {
@@ -435,11 +436,6 @@ static void nvme_requeue_work(struct work_struct *work)
next = bio->bi_next;
bio->bi_next = NULL;
- /*
- * Reset disk to the mpath node and resubmit to select a new
- * path.
- */
- bio_set_dev(bio, head->disk->part0);
submit_bio_noacct(bio);
}
}
--
2.29.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] nvme: reset disk to the mpath node also when requeuing
2021-06-02 12:34 [PATCH] nvme: reset disk to the mpath node also when requeuing Daniel Wagner
@ 2021-06-02 12:49 ` Daniel Wagner
0 siblings, 0 replies; 2+ messages in thread
From: Daniel Wagner @ 2021-06-02 12:49 UTC (permalink / raw)
To: linux-nvme
Cc: linux-kernel, Keith Busch, Jens Axboe, Christoph Hellwig, Sagi Grimberg
On Wed, Jun 02, 2021 at 02:34:29PM +0200, Daniel Wagner wrote:
> spin_lock_irq(&head->requeue_lock);
> + bio_set_dev(bio, head->disk->part0);
Obviously, this needs to be done for all bios. Let me send an updated
version.x
^ permalink raw reply [flat|nested] 2+ messages in thread
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