[PATCH net-stable 05/24] hv_netvsc: Set tx_table to equal weight after subchannels open
From: Stephen Hemminger <stephen@networkplumber.org>
Date: 2018-05-14 22:32:38
Subsystem:
hyper-v/azure core and drivers, networking drivers, the rest · Maintainers:
"K. Y. Srinivasan", Haiyang Zhang, Wei Liu, Dexuan Cui, Long Li, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Haiyang Zhang <haiyangz@microsoft.com> commit a6fb6aa3cfa9047b62653dbcfc9bcde6e2272b41 upstream. In some cases, like internal vSwitch, the host doesn't provide send indirection table updates. This patch sets the table to be equal weight after subchannels are all open. Otherwise, all workload will be on one TX channel. As tested, this patch has largely increased the throughput over internal vSwitch. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net> --- drivers/net/hyperv/rndis_filter.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index addf9f69c58c..0648eebda829 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c@@ -1114,6 +1114,9 @@ void rndis_set_subchannel(struct work_struct *w) netif_set_real_num_tx_queues(ndev, nvdev->num_chn); netif_set_real_num_rx_queues(ndev, nvdev->num_chn); + for (i = 0; i < VRSS_SEND_TAB_SIZE; i++) + ndev_ctx->tx_table[i] = i % nvdev->num_chn; + rtnl_unlock(); return;
--
2.17.0