Eric Dumazet f86dcc5aa8 udp: dynamically size hash tables at boot time ... UDP_HTABLE_SIZE was initialy defined to 128, which is a bit small for several setups. 4000 active UDP sockets -> 32 sockets per chain in average. An incoming frame has to lookup all sockets to find best match, so long chains hurt latency. Instead of a fixed size hash table that cant be perfect for every needs, let UDP stack choose its table size at boot time like tcp/ip route, using alloc_large_system_hash() helper Add an optional boot parameter, uhash_entries=x so that an admin can force a size between 256 and 65536 if needed, like thash_entries and rhash_entries. dmesg logs two new lines : [ 0.647039] UDP hash table entries: 512 (order: 0, 4096 bytes) [ 0.647099] UDP Lite hash table entries: 512 (order: 0, 4096 bytes) Maximal size on 64bit arches would be 65536 slots, ie 1 MBytes for non debugging spinlocks. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2009-10-07 22:00:22 -07:00
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acpi	ACPI: remove acpi_device_uid() and related stuff	2009-09-25 15:09:49 -04:00
asm-generic	asm-generic/gpio.h: pull in linux/kernel.h for might_sleep()	2009-10-01 16:11:11 -07:00
crypto
drm	Merge branch 'drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6	2009-09-30 08:03:00 -07:00
keys
linux	udp: dynamically size hash tables at boot time	2009-10-07 22:00:22 -07:00
math-emu
media
mtd
net	udp: dynamically size hash tables at boot time	2009-10-07 22:00:22 -07:00
pcmcia	PM / PCMCIA: Drop second argument of pcmcia_socket_dev_suspend()	2009-09-29 00:10:41 +02:00
rdma
rxrpc
scsi
sound
trace	Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block	2009-10-04 12:39:14 -07:00
video	davinci-fb-frame-buffer-driver-for-ti-da8xx-omap-l1xx-v4	2009-09-23 07:39:51 -07:00
xen
Kbuild