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| author |  Haiyang Zhang <haiyangz@microsoft.com>
| 2017-08-21 19:22:39 -0700 |
|---|---|---|
| committer |  David S. Miller <davem@davemloft.net>
| 2017-08-22 14:08:12 -0700 |
| commit | 4823eb2f3af44e2b9f7f02bed5a211e9ce79051f (patch) | |
| tree | 19b9069aa1b175b4888c5ed02a4de99f58326ddb /drivers/net/hyperv/hyperv_net.h | |
| parent | hv_netvsc: Clean up unused parameter from netvsc_get_rss_hash_opts() (diff) | |
| download | linux-4823eb2f3af44e2b9f7f02bed5a211e9ce79051f.tar.gz linux-4823eb2f3af44e2b9f7f02bed5a211e9ce79051f.tar.bz2 linux-4823eb2f3af44e2b9f7f02bed5a211e9ce79051f.zip | |
hv_netvsc: Add ethtool handler to set and get UDP hash levels
The patch add the functions to switch UDP hash level between
L3 and L4 by ethtool command. UDP over IPv4 and v6 can be set
differently. The default hash level is L4. We currently only
allow switching TX hash level from within the guests.
On Azure, fragmented UDP packets have high loss rate with L4
hashing. Using L3 hashing is recommended in this case.
For example, for UDP over IPv4 on eth0:
To include UDP port numbers in hasing:
ethtool -N eth0 rx-flow-hash udp4 sdfn
To exclude UDP port numbers in hasing:
ethtool -N eth0 rx-flow-hash udp4 sd
To show UDP hash level:
ethtool -n eth0 rx-flow-hash udp4
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/hyperv/hyperv_net.h')
| -rw-r--r-- | drivers/net/hyperv/hyperv_net.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index 9198dd1240ed..ff1c0c8d5e0d 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -720,6 +720,8 @@ struct net_device_context { u32 tx_send_table[VRSS_SEND_TAB_SIZE]; /* Ethtool settings */ + bool udp4_l4_hash; + bool udp6_l4_hash; u8 duplex; u32 speed; struct netvsc_ethtool_stats eth_stats; |