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authorEric Dumazet <eric.dumazet@gmail.com>2011-01-03 13:35:22 +0300
committerDavid S. Miller <davem@davemloft.net>2011-01-03 23:43:10 +0300
commit39980292fda20b38baf95bfa577db8b678eecc86 (patch)
tree12259aee27b284c45b4444ce2985e940bea503d8 /drivers/net
parent0dfb33a0d7e2d9316eb4441a065ddd173f87223e (diff)
downloadlinux-39980292fda20b38baf95bfa577db8b678eecc86.tar.xz
ifb: add performance flags
Le lundi 03 janvier 2011 à 11:40 -0800, David Miller a écrit : > From: Jarek Poplawski <jarkao2@gmail.com> > Date: Mon, 3 Jan 2011 20:37:03 +0100 > > > On Sun, Jan 02, 2011 at 09:24:36PM +0100, Eric Dumazet wrote: > >> Le mercredi 29 décembre 2010 ?? 00:07 +0100, Jarek Poplawski a écrit : > >> > >> > Ingress is before vlans handler so these features and the > >> > NETIF_F_HW_VLAN_TX flag seem useful for ifb considering > >> > dev_hard_start_xmit() checks. > >> > >> OK, here is v2 of the patch then, thanks everybody. > >> > >> > >> [PATCH v2 net-next-2.6] ifb: add performance flags > >> > >> IFB can use the full set of features flags (NETIF_F_SG | > >> NETIF_F_FRAGLIST | NETIF_F_TSO | NETIF_F_NO_CSUM | NETIF_F_HIGHDMA) to > >> avoid unnecessary split of some packets (GRO for example) > >> > >> Changli suggested to also set vlan_features, > > > > He also suggested more GSO flags of which especially NETIF_F_TSO6 > > seems interesting (wrt GRO)? > > I think at least TSO6 would very much be appropriate here. Yes, why not, I am only wondering why loopback / dummy (and others ?) only set NETIF_F_TSO :) Since I want to play with ECN, I might also add NETIF_F_TSO_ECN ;) For other flags, I really doubt it can matter on ifb ? [PATCH v3 net-next-2.6] ifb: add performance flags IFB can use the full set of features flags (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO | NETIF_F_NO_CSUM | NETIF_F_HIGHDMA) to avoid unnecessary split of some packets (GRO for example) Changli suggested to also set vlan_features, NETIF_F_TSO6, NETIF_F_TSO_ECN. Jarek suggested to add NETIF_F_HW_VLAN_TX as well. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Changli Gao <xiaosuo@gmail.com> Cc: Jarek Poplawski <jarkao2@gmail.com> Cc: Pawel Staszewski <pstaszewski@itcare.pl> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ifb.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/ifb.c b/drivers/net/ifb.c
index 124dac4532b2..e07d487f015a 100644
--- a/drivers/net/ifb.c
+++ b/drivers/net/ifb.c
@@ -126,6 +126,10 @@ static const struct net_device_ops ifb_netdev_ops = {
.ndo_validate_addr = eth_validate_addr,
};
+#define IFB_FEATURES (NETIF_F_NO_CSUM | NETIF_F_SG | NETIF_F_FRAGLIST | \
+ NETIF_F_TSO_ECN | NETIF_F_TSO | NETIF_F_TSO6 | \
+ NETIF_F_HIGHDMA | NETIF_F_HW_VLAN_TX)
+
static void ifb_setup(struct net_device *dev)
{
/* Initialize the device structure. */
@@ -136,6 +140,9 @@ static void ifb_setup(struct net_device *dev)
ether_setup(dev);
dev->tx_queue_len = TX_Q_LIMIT;
+ dev->features |= IFB_FEATURES;
+ dev->vlan_features |= IFB_FEATURES;
+
dev->flags |= IFF_NOARP;
dev->flags &= ~IFF_MULTICAST;
dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;