From: Haiyang Zhang <haiyangz@microsoft.com>
To: linux-hyperv@vger.kernel.org, netdev@vger.kernel.org
Cc: haiyangz@microsoft.com, kys@microsoft.com,
sthemmin@microsoft.com, olaf@aepfle.de, vkuznets@redhat.com,
davem@davemloft.net, linux-kernel@vger.kernel.org
Subject: [PATCH net, 2/2] hv_netvsc: Fix the queue_mapping in netvsc_vf_xmit()
Date: Thu, 20 Aug 2020 14:53:15 -0700 [thread overview]
Message-ID: <1597960395-1897-3-git-send-email-haiyangz@microsoft.com> (raw)
In-Reply-To: <1597960395-1897-1-git-send-email-haiyangz@microsoft.com>
netvsc_vf_xmit() / dev_queue_xmit() will call VF NIC’s ndo_select_queue
or netdev_pick_tx() again. They will use skb_get_rx_queue() to get the
queue number, so the “skb->queue_mapping - 1” will be used. This may
cause the last queue of VF not been used.
Use skb_record_rx_queue() here, so that the skb_get_rx_queue() called
later will get the correct queue number, and VF will be able to use
all queues.
Fixes: b3bf5666a510 ("hv_netvsc: defer queue selection to VF")
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
---
drivers/net/hyperv/netvsc_drv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 0029292cdb9f..64b0a74c1523 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -502,7 +502,7 @@ static int netvsc_vf_xmit(struct net_device *net, struct net_device *vf_netdev,
int rc;
skb->dev = vf_netdev;
- skb->queue_mapping = qdisc_skb_cb(skb)->slave_dev_queue_mapping;
+ skb_record_rx_queue(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping);
rc = dev_queue_xmit(skb);
if (likely(rc == NET_XMIT_SUCCESS || rc == NET_XMIT_CN)) {
--
2.25.1
next prev parent reply other threads:[~2020-08-20 21:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-20 21:53 [PATCH net, 0/2] hv_netvsc: Some fixes for the select_queue Haiyang Zhang
2020-08-20 21:53 ` [PATCH net, 1/2] hv_netvsc: Remove "unlikely" from netvsc_select_queue Haiyang Zhang
2020-08-20 21:53 ` Haiyang Zhang [this message]
2020-08-20 23:24 ` [PATCH net, 0/2] hv_netvsc: Some fixes for the select_queue David Miller
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