From: Bob Liu <bob.liu@oracle.com>
To: linux-kernel@vger.kernel.org
Cc: mst@redhat.com, virtualization@lists.linux-foundation.org,
Bob Liu <bob.liu@oracle.com>
Subject: [PATCH] drivers: virtio_blk: notify blk-core when hw-queue number changes
Date: Mon, 13 Jun 2016 17:58:26 +0800 [thread overview]
Message-ID: <1465811906-24510-1-git-send-email-bob.liu@oracle.com> (raw)
A guest might be migrated to other hosts with different num_queues, the
blk-core should aware of that else the reference of &vblk->vqs[qid] may be wrong.
Signed-off-by: Bob Liu <bob.liu@oracle.com>
---
drivers/block/virtio_blk.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 42758b5..c169238 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -819,6 +819,9 @@ static int virtblk_restore(struct virtio_device *vdev)
if (ret)
return ret;
+ if (vblk->num_vqs != vblk->tag_set.nr_hw_queues)
+ blk_mq_update_nr_hw_queues(&vblk->tag_set, vblk->num_vqs);
+
virtio_device_ready(vdev);
blk_mq_start_stopped_hw_queues(vblk->disk->queue, true);
--
2.7.4
next reply other threads:[~2016-06-13 9:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-13 9:58 Bob Liu [this message]
[not found] <1465811906-24510-1-git-send-email-bob.liu__9616.24590349874$1465832216$gmane$org@oracle.com>
2016-06-18 22:10 ` Paolo Bonzini
2016-07-28 8:18 ` Bob Liu
2016-08-01 9:58 ` Paolo Bonzini
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