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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acpi	acpi: Support IBM SMBus CMI devices	2010-03-24 14:38:37 +01:00
asm-generic	dma-mapping: pci: move pci_set_dma_mask and pci_set_consistent_dma_mask to pci-dma-compat.h	2010-03-12 15:52:42 -08:00
crypto
drm	Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6	2010-04-19 07:27:06 -07:00
keys
linux	caif: Rewritten socket implementation	2010-04-28 12:55:14 -07:00
math-emu
media	Merge branch 'for-next' into for-linus	2010-03-08 16:55:37 +01:00
mtd
net	net: speedup udp receive path	2010-04-28 14:35:48 -07:00
pcmcia	pcmcia: use dev_pm_ops for class pcmcia_socket_class	2010-03-24 11:00:11 +01:00
rdma	Merge branch 'misc' into for-next	2010-03-01 23:52:31 -08:00
rxrpc
scsi	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
sound	Merge branch 'fix/asoc' into for-linus	2010-04-07 09:54:41 +02:00
trace	Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block	2010-04-09 11:50:29 -07:00
video	broadsheetfb: support storing waveform	2010-03-12 15:52:34 -08:00
xen	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
Kbuild