Jason Wang
ece793fcfc
macvtap: do not zerocopy if iov needs more pages than MAX_SKB_FRAGS
...
We try to linearize part of the skb when the number of iov is greater than
MAX_SKB_FRAGS. This is not enough since each single vector may occupy more than
one pages, so zerocopy_sg_fromiovec() may still fail and may break the guest
network.
Solve this problem by calculate the pages needed for iov before trying to do
zerocopy and switch to use copy instead of zerocopy if it needs more than
MAX_SKB_FRAGS.
This is done through introducing a new helper to count the pages for iov, and
call uarg->callback() manually when switching from zerocopy to copy to notify
vhost.
We can do further optimization on top.
This bug were introduced from b92946e291
(macvtap: zerocopy: validate vectors before building skb).
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-18 13:04:25 -07:00
..
appletalk
arcnet
bonding
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2013-07-03 14:55:13 -07:00
caif
drivers/net: caif: fix wrong rtnl_is_locked() usage
2013-07-09 12:55:48 -07:00
can
drivers/net/can/c_can: don't use devm_pinctrl_get_select_default() in probe
2013-07-11 17:18:26 -07:00
cris
dsa
ethernet
be2net: Fix to avoid hardware workaround when not needed
2013-07-16 13:01:57 -07:00
fddi
hamradio
net: pass info struct via netdevice notifier
2013-05-28 13:11:01 -07:00
hippi
hyperv
hyperv: Fix the NETIF_F_SG flag setting in netvsc
2013-07-16 23:02:24 -07:00
ieee802154
drivers/net/ieee802154: don't use devm_pinctrl_get_select_default() in probe
2013-07-11 17:18:27 -07:00
irda
phy
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2013-07-13 17:42:22 -07:00
plip
ppp
net: pass info struct via netdevice notifier
2013-05-28 13:11:01 -07:00
slip
team
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2013-06-19 16:49:39 -07:00
usb
usb/net/r815x: fix cast to restricted __le32
2013-07-12 16:13:34 -07:00
vmxnet3
wan
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2013-07-03 14:55:13 -07:00
wimax
wireless
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2013-07-09 18:24:39 -07:00
xen-netback
xen-netback: xenbus.c: use more current logging styles
2013-07-02 00:52:55 -07:00
dummy.c
dummy: fix oops when loading the dummy failed
2013-07-11 11:59:20 -07:00
eql.c
ifb.c
ifb: fix oops when loading the ifb failed
2013-07-11 12:00:05 -07:00
Kconfig
packet: nlmon: virtual netlink monitoring device for packet sockets
2013-06-24 16:39:05 -07:00
LICENSE.SRC
loopback.c
macvlan.c
macvtap: Let TUNSETOFFLOAD actually controll offload features.
2013-06-25 16:44:56 -07:00
macvtap.c
macvtap: do not zerocopy if iov needs more pages than MAX_SKB_FRAGS
2013-07-18 13:04:25 -07:00
Makefile
packet: nlmon: virtual netlink monitoring device for packet sockets
2013-06-24 16:39:05 -07:00
mdio.c
mii.c
netconsole.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2013-07-09 18:24:39 -07:00
nlmon.c
nlmon: use standard rtnetlink link api for add/del devices
2013-07-02 12:53:17 -07:00
ntb_netdev.c
rionet.c
rapidio/rionet: rework driver initialization and removal
2013-07-03 16:08:04 -07:00
sb1000.c
Space.c
sungem_phy.c
tun.c
tuntap: do not zerocopy if iov needs more pages than MAX_SKB_FRAGS
2013-07-18 13:04:25 -07:00
veth.c
veth: remove redundant call of dev_alloc_name
2013-06-12 01:21:20 -07:00
virtio_net.c
No real surprises.
2013-07-10 14:50:58 -07:00
vxlan.c
vxlan: add necessary locking on device removal
2013-07-17 12:51:19 -07:00
xen-netfront.c
xen-netfront: pull on receive skb may need to happen earlier
2013-07-17 12:51:19 -07:00