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Eric Dumazet 042a53a9e4 net: skb_shared_info optimization 
skb_dma_unmap() is quite expensive for small packets,
because we use two different cache lines from skb_shared_info.

One to access nr_frags, one to access dma_maps[0]

Instead of dma_maps being an array of MAX_SKB_FRAGS + 1 elements,
let dma_head alone in a new dma_head field, close to nr_frags,
to reduce cache lines misses.

Tested on my dev machine (bnx2 & tg3 adapters), nice speedup !

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-08 00:21:48 -07:00
..
datagram.c Network Drop Monitor: Fix skb_kill_datagram 2009-05-08 14:57:01 -07:00
dev.c net: introduce pre-up netdev notifier 2009-06-03 14:05:12 -04:00
dev_mcast.c net: Rationalise email address: Network Specific Parts 2008-10-13 19:01:08 -07:00
drop_monitor.c dropmon: add ability to detect when hardware dropsrxpackets 2009-05-21 16:50:21 -07:00
dst.c net: speedup dst_release() 2008-11-14 00:53:54 -08:00
ethtool.c core: remove pointless conditional before kfree() 2009-03-31 15:06:26 -07:00
fib_rules.c net: Remove unused parameter from fill method in fib_rules_ops. 2009-05-20 17:26:23 -07:00
filter.c filter: add SKF_AD_NLATTR_NEST to look for nested attributes 2008-11-20 00:49:27 -08:00
flow.c netns xfrm: lookup in netns 2008-11-25 17:35:18 -08:00
gen_estimator.c pkt_sched: gen_estimator: Fix signed integers right-shifts. 2009-05-25 22:47:01 -07:00
gen_stats.c [NET_SCHED]: Convert packet schedulers from rtnetlink to new netlink API 2008-01-28 15:11:10 -08:00
iovec.c tun: fix tun_chr_aio_write so that aio works 2009-04-21 05:42:46 -07:00
kmap_skb.h [PATCH] severing skbuff.h -> highmem.h 2006-12-04 02:00:29 -05:00
link_watch.c Revert "net: Fix for initial link state in 2.6.28" 2009-01-05 16:01:51 -08:00
Makefile Network Drop Monitor: Adding Build changes to enable drop monitor 2009-03-13 12:09:29 -07:00
neighbour.c net: skb->dst accessors 2009-06-03 02:51:04 -07:00
net-sysfs.c net: Remove bogus reference to BUS_ID_SIZE in sysfs code. 2009-05-26 21:05:19 -07:00
net-sysfs.h netns: Fix device renaming for sysfs 2008-05-02 17:00:58 -07:00
net-traces.c dropmon: add ability to detect when hardware dropsrxpackets 2009-05-21 16:50:21 -07:00
net_namespace.c netns: simplify net_ns_init 2009-05-21 15:10:31 -07:00
netevent.c [NET]: net/core/netevent.c should #include <net/netevent.h> 2007-07-05 17:40:27 -07:00
netpoll.c net: txq_trans_update() helper 2009-05-25 22:58:01 -07:00
pktgen.c net: txq_trans_update() helper 2009-05-25 22:58:01 -07:00
request_sock.c net: convert BUG_TRAP to generic WARN_ON 2008-07-25 21:43:18 -07:00
rtnetlink.c netlink: change nlmsg_notify() return value logic 2009-02-24 23:18:28 -08:00
scm.c Merge branch 'master' into next 2008-11-18 18:52:37 +11:00
skb_dma_map.c net: skb_shared_info optimization 2009-06-08 00:21:48 -07:00
skbuff.c net: Ensure partial checksum offset is inside the skb head 2009-06-08 00:20:19 -07:00
sock.c net: net/core/sock.c cleanup 2009-05-27 15:47:07 -07:00
stream.c tcp: tcp_prequeue() can use keyed wakeups 2009-05-17 20:44:43 -07:00
sysctl_net_core.c sysctl: fix sparse warning: Should it be static? 2009-02-26 23:13:34 -08:00
user_dma.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2008-07-26 20:17:56 -07:00
utils.c net: core: remove unneeded include in net/core/utils.c. 2009-03-26 01:11:48 -07:00