Eric Dumazet 4b0b72f7dd net: speedup udp receive path ... Since commit 95766fff ([UDP]: Add memory accounting.), each received packet needs one extra sock_lock()/sock_release() pair. This added latency because of possible backlog handling. Then later, ticket spinlocks added yet another latency source in case of DDOS. This patch introduces lock_sock_bh() and unlock_sock_bh() synchronization primitives, avoiding one atomic operation and backlog processing. skb_free_datagram_locked() uses them instead of full blown lock_sock()/release_sock(). skb is orphaned inside locked section for proper socket memory reclaim, and finally freed outside of it. UDP receive path now take the socket spinlock only once. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2010-04-28 14:35:48 -07:00
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datagram.c	net: speedup udp receive path	2010-04-28 14:35:48 -07:00
dev_addr_lists.c	net: include linux/proc_fs.h in dev_addr_lists.c	2010-04-07 16:46:36 -07:00
dev.c	net: batch skb dequeueing from softnet input_pkt_queue	2010-04-27 15:11:49 -07:00
drop_monitor.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
dst.c	dst: don't inline dst_ifdown	2010-04-13 03:32:44 -07:00
ethtool.c	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2010-04-11 14:53:53 -07:00
fib_rules.c	net: fib_rules: mark arguments to fib_rules_register const and __net_initdata	2010-04-26 16:02:04 +02:00
filter.c	net: Socket filter ancilliary data access for skb->dev->type	2010-04-22 16:05:44 -07:00
flow.c	flow: delayed deletion of flow cache entries	2010-04-07 03:43:20 -07:00
gen_estimator.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
gen_stats.c	pkt_sched: gen_estimator: Dont report fake rate estimators	2009-10-07 01:07:42 -07:00
iovec.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
kmap_skb.h
link_watch.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
Makefile	net: convert multicast list to list_head	2010-04-03 14:22:15 -07:00
neighbour.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
net_namespace.c	net: disallow to use net_assign_generic externally	2010-04-27 15:49:02 -07:00
net-sysfs.c	rps: static functions	2010-04-19 14:40:57 -07:00
net-sysfs.h	netns: Fix device renaming for sysfs	2008-05-02 17:00:58 -07:00
net-traces.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
netevent.c
netpoll.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
pktgen.c	pktgen node allocation	2010-03-21 20:33:36 -07:00
request_sock.c	net: convert BUG_TRAP to generic WARN_ON	2008-07-25 21:43:18 -07:00
rtnetlink.c	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/ipmr-2.6	2010-04-27 12:57:39 -07:00
scm.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
skbuff.c	net: Remove two unnecessary exports (skbuff).	2010-04-20 22:39:53 -07:00
sock.c	net: sk_add_backlog() take rmem_alloc into account	2010-04-27 15:13:20 -07:00
stream.c	net: sk_sleep() helper	2010-04-20 16:37:13 -07:00
sysctl_net_core.c	rfs: Receive Flow Steering	2010-04-16 16:01:27 -07:00
user_dma.c	net/core/user_dma.c: Use frag list abstraction interfaces.	2009-06-09 00:19:10 -07:00
utils.c	printk: Remove ratelimit.h from kernel.h	2009-09-22 16:18:09 +02:00