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fd11a83dd3
linux/net
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Alexander Duyck fd11a83dd3 net: Pull out core bits of __netdev_alloc_skb and add __napi_alloc_skb 
This change pulls the core functionality out of __netdev_alloc_skb and
places them in a new function named __alloc_rx_skb.  The reason for doing
this is to make these bits accessible to a new function __napi_alloc_skb.
In addition __alloc_rx_skb now has a new flags value that is used to
determine which page frag pool to allocate from.  If the SKB_ALLOC_NAPI
flag is set then the NAPI pool is used.  The advantage of this is that we
do not have to use local_irq_save/restore when accessing the NAPI pool from
NAPI context.

In my test setup I saw at least 11ns of savings using the napi_alloc_skb
function versus the netdev_alloc_skb function, most of this being due to
the fact that we didn't have to call local_irq_save/restore.

The main use case for napi_alloc_skb would be for things such as copybreak
or page fragment based receive paths where an skb is allocated after the
data has been received instead of before.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-10 13:31:57 -05:00
..
6lowpan net/6lowpan: Remove FSF address from GPL statement. 2014-12-05 12:43:04 +01:00
9p 9p/trans_virtio: enable VQs early 2014-10-15 10:25:04 +10:30
802
8021q vlan: Pass ethtool get_ts_info queries to real device. 2014-11-21 15:35:53 -05:00
appletalk new helper: memcpy_from_msg() 2014-11-24 04:28:48 -05:00
atm put iov_iter into msghdr 2014-12-09 16:29:03 -05:00
ax25 new helper: memcpy_from_msg() 2014-11-24 04:28:48 -05:00
batman-adv batman-adv: replace strnicmp with strncasecmp 2014-10-14 02:18:24 +02:00
bluetooth Merge branch 'for-davem-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-12-10 13:17:23 -05:00
bridge Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next 2014-12-05 20:56:46 -08:00
caif put iov_iter into msghdr 2014-12-09 16:29:03 -05:00
can can: fix spelling errors 2014-12-07 21:22:05 +01:00
ceph libceph: change from BUG to WARN for __remove_osd() asserts 2014-11-13 22:26:34 +03:00
core net: Pull out core bits of __netdev_alloc_skb and add __napi_alloc_skb 2014-12-10 13:31:57 -05:00
dcb dcbnl : Disable software interrupts before taking dcb_lock 2014-11-16 14:50:52 -05:00
dccp new helper: memcpy_from_msg() 2014-11-24 04:28:48 -05:00
decnet new helper: memcpy_to_msg() 2014-11-24 04:28:51 -05:00
dns_resolver
dsa net: dsa: replace count*size kzalloc by kcalloc 2014-11-16 14:41:39 -05:00
ethernet
hsr
ieee802154 Merge tag 'master-2014-12-08' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next 2014-12-09 18:12:03 -05:00
ipv4 Merge branch 'for-davem-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-12-10 13:17:23 -05:00
ipv6 put iov_iter into msghdr 2014-12-09 16:29:03 -05:00
ipx switch ipxrtr_route_packet() from iovec to msghdr 2014-11-24 04:28:49 -05:00
irda new helper: memcpy_to_msg() 2014-11-24 04:28:51 -05:00
iucv new helper: memcpy_from_msg() 2014-11-24 04:28:48 -05:00
key new helper: memcpy_from_msg() 2014-11-24 04:28:48 -05:00
l2tp ip_generic_getfrag, udplite_getfrag: switch to passing msghdr 2014-12-09 16:28:22 -05:00
lapb lapb: move EXPORT_SYMBOL after functions. 2014-10-24 15:51:42 -04:00
llc new helper: memcpy_from_msg() 2014-11-24 04:28:48 -05:00
mac80211 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless 2014-12-08 13:58:58 -05:00
mac802154 mac802154: use goto label on failure 2014-12-05 14:18:42 +01:00
mpls net: Remove MPLS GSO feature. 2014-11-05 23:52:33 -08:00
netfilter dst: no need to take reference on DST_NOCACHE dsts 2014-12-09 16:08:17 -05:00
netlabel netlabel: kernel-doc warning fix 2014-10-09 01:40:05 -04:00
netlink put iov_iter into msghdr 2014-12-09 16:29:03 -05:00
netrom new helper: memcpy_from_msg() 2014-11-24 04:28:48 -05:00
nfc Merge tag 'master-2014-12-08' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next 2014-12-09 18:12:03 -05:00
openvswitch openvswitch: set correct protocol on route lookup 2014-12-09 16:01:21 -05:00
packet put iov_iter into msghdr 2014-12-09 16:29:03 -05:00
phonet new helper: memcpy_from_msg() 2014-11-24 04:28:48 -05:00
rds put iov_iter into msghdr 2014-12-09 16:29:03 -05:00
rfkill net: rfkill: kernel-doc warning fixes 2014-10-09 11:16:15 +02:00
rose new helper: memcpy_from_msg() 2014-11-24 04:28:48 -05:00
rxrpc put iov_iter into msghdr 2014-12-09 16:29:03 -05:00
sched net: sched: cls: use nla_nest_cancel instead of nlmsg_trim 2014-12-09 21:49:58 -05:00
sctp put iov_iter into msghdr 2014-12-09 16:29:03 -05:00
sunrpc SUNRPC: Fix locking around callback channel reply receive 2014-11-19 12:03:20 -05:00
switchdev bridge: call netdev_sw_port_stp_update when bridge port STP status changes 2014-12-02 20:01:22 -08:00
tipc Merge branch 'for-davem-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-12-10 13:17:23 -05:00
unix put iov_iter into msghdr 2014-12-09 16:29:03 -05:00
vmw_vsock put iov_iter into msghdr 2014-12-09 16:29:03 -05:00
wimax wimax: convert printk to pr_foo() 2014-10-07 20:28:44 -04:00
wireless cfg80211: remove unneeded initialisations in nl80211_set_reg 2014-11-28 14:54:31 +01:00
x25 new helper: memcpy_from_msg() 2014-11-24 04:28:48 -05:00
xfrm Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2014-12-08 21:30:21 -05:00
compat.c put iov_iter into msghdr 2014-12-09 16:29:03 -05:00
Kconfig net: introduce generic switch devices support 2014-12-02 20:01:20 -08:00
Makefile net: introduce generic switch devices support 2014-12-02 20:01:20 -08:00
nonet.c
socket.c put iov_iter into msghdr 2014-12-09 16:29:03 -05:00
sysctl_net.c