Re: [RFC PATCH 2/2] block: virtio-blk: support multi virt queues per virtio-blk device
From: Stefan Hajnoczi <hidden>
Date: 2014-06-17 02:40:58
Also in:
lkml, virtualization
On Sat, Jun 14, 2014 at 1:29 AM, Ming Lei [off-list ref] wrote:
quoted hunk ↗ jump to hunk
Firstly this patch supports more than one virtual queues for virtio-blk device. Secondly this patch maps the virtual queue to blk-mq's hardware queue. With this approach, both scalability and performance problem can be improved. Signed-off-by: Ming Lei <redacted> --- drivers/block/virtio_blk.c | 75 ++++++++++++++++++++++++++++++++------------ 1 file changed, 55 insertions(+), 20 deletions(-)diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c index f63d358..e0d077d 100644 --- a/drivers/block/virtio_blk.c +++ b/drivers/block/virtio_blk.c@@ -16,6 +16,8 @@ #define PART_BITS 4 +#define MAX_NUM_VQ 16
It would be nice to allocate virtqueues dynamically instead of hardcoding the limit. virtio-scsi also allocates virtqueues dynamically. Stefan