From: Stephen Hemminger <stephen@networkplumber.org>
To: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com
Cc: devel@linuxdriverproject.org, netdev@vger.kernel.org
Subject: [PATCH net 9/9] hv_netvsc: defer queue selection to VF
Date: Thu, 1 Mar 2018 10:27:56 -0800 [thread overview]
Message-ID: <20180301182756.23027-10-sthemmin@microsoft.com> (raw)
In-Reply-To: <20180301182756.23027-1-sthemmin@microsoft.com>
When VF is used for accelerated networking it will likely have
more queues (and different policy) than the synthetic NIC.
This patch defers the queue policy to the VF so that all the
queues can be used. This impacts workloads like local generate UDP.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
---
drivers/net/hyperv/netvsc_drv.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 1909c58e0a7e..e36f3ae6893b 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -322,8 +322,19 @@ static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb,
rcu_read_lock();
vf_netdev = rcu_dereference(ndc->vf_netdev);
if (vf_netdev) {
- txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
- qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
+ const struct net_device_ops *vf_ops = vf_netdev->netdev_ops;
+
+ if (vf_ops->ndo_select_queue)
+ txq = vf_ops->ndo_select_queue(vf_netdev, skb,
+ accel_priv, fallback);
+ else
+ txq = fallback(vf_netdev, skb);
+
+ /* Record the queue selected by VF so that it can be
+ * used for common case where VF has more queues than
+ * the synthetic device.
+ */
+ qdisc_skb_cb(skb)->slave_dev_queue_mapping = txq;
} else {
txq = netvsc_pick_tx(ndev, skb);
}
--
2.16.1
prev parent reply other threads:[~2018-03-01 18:27 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-01 18:27 [PATCH net 0/9] hv_netvsc: minor bug fixes Stephen Hemminger
2018-03-01 18:27 ` [PATCH net 1/9] hv_netvsc: avoid retry on send during shutdown Stephen Hemminger
2018-03-01 18:27 ` [PATCH net 2/9] hv_netvsc: only wake transmit queue if link is up Stephen Hemminger
2018-03-01 18:27 ` [PATCH net 3/9] hv_netvsc: fix error unwind handling if vmbus_open fails Stephen Hemminger
2018-03-01 18:27 ` [PATCH net 4/9] hv_netvsc: cancel subchannel setup before halting device Stephen Hemminger
2018-03-01 18:27 ` [PATCH net 5/9] hv_netvsc: fix race in napi poll when rescheduling Stephen Hemminger
2018-03-01 18:27 ` [PATCH net 6/9] hv_netvsc: use napi_schedule_irqoff Stephen Hemminger
2018-03-01 18:27 ` [PATCH net 7/9] hv_netvsc: don't need full irqsave for request_lock Stephen Hemminger
2018-03-01 18:27 ` [PATCH net 8/9] hv_netvsc: propagate rx filters to VF Stephen Hemminger
2018-03-01 21:56 ` Jakub Kicinski
2018-03-01 23:46 ` Stephen Hemminger
2018-03-01 18:27 ` Stephen Hemminger [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180301182756.23027-10-sthemmin@microsoft.com \
--to=stephen@networkplumber.org \
--cc=devel@linuxdriverproject.org \
--cc=haiyangz@microsoft.com \
--cc=kys@microsoft.com \
--cc=netdev@vger.kernel.org \
--cc=sthemmin@microsoft.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.