OpenSDV
/
linux-stable-rt
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
linux-stable-rt/Documentation
History
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
..
ABI cciss: Add usage_count attribute to each logical drive in /sys 2009-10-01 21:15:44 +02:00
DocBook Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
PCI
…
RCU
…
accounting Documentation/: fix warnings from -Wmissing-prototypes in HOSTCFLAGS 2009-09-23 07:39:28 -07:00
acpi
…
aoe
…
arm ARM: 5738/1: Correct TCM documentation 2009-10-01 16:26:16 +01:00
auxdisplay includecheck fix: Documentation, cfag12864b-example.c 2009-09-24 07:20:57 -07:00
blackfin
…
block
…
blockdev
…
cdrom
…
cgroups memory controller: soft limit documentation 2009-09-24 07:20:59 -07:00
connector connector: Provide the sender's credentials to the callback 2009-10-02 10:54:01 -07:00
console
…
cpu-freq
…
cpuidle
…
cris
…
crypto
…
development-process
…
device-mapper
…
driver-model
…
dvb V4L/DVB (12902): Documentation: synchronize documentation for Technisat cards 2009-09-19 00:14:32 -03:00
early-userspace
…
fault-injection
…
fb matroxfb: make CONFIG_FB_MATROX_MULTIHEAD=y mandatory 2009-09-23 07:39:56 -07:00
filesystems Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 2009-09-30 09:32:30 -07:00
firmware_class
…
frv
…
hwmon ltc4215/ltc4245: Discard obsolete detect methods 2009-10-04 22:53:42 +02:00
i2c i2c: Minor documentation update 2009-10-04 22:53:45 +02:00
i2o
…
ia64 Documentation/: fix warnings from -Wmissing-prototypes in HOSTCFLAGS 2009-09-23 07:39:28 -07:00
ide
…
infiniband
…
input
…
ioctl drivers/char/uv_mmtimer.c: add memory mapped RTC driver for UV 2009-09-24 07:21:03 -07:00
isdn gigaset: add Kernel CAPI interface (v3) 2009-10-06 22:43:53 -07:00
ja_JP
…
kbuild kbuild: introduce ld-option 2009-09-20 12:27:42 +02:00
kdump
…
ko_KR
…
kvm
…
laptops Merge branch 'thinkpad-2.6.32-part2' into release 2009-09-26 01:08:55 -04:00
lguest lguest: don't force VIRTIO_F_NOTIFY_ON_EMPTY 2009-09-23 22:26:47 +09:30
m68k
…
make
…
mips
…
misc-devices max6875: Discard obsolete detect method 2009-10-04 22:53:41 +02:00
mn10300
…
mtd
…
namespaces
…
netlabel
…
networking make TLLAO option for NA packets configurable 2009-10-07 01:10:45 -07:00
parisc
…
pcmcia Documentation/: fix warnings from -Wmissing-prototypes in HOSTCFLAGS 2009-09-23 07:39:28 -07:00
power Merge git://git.infradead.org/battery-2.6 2009-09-23 10:11:08 -07:00
powerpc Merge git://git.infradead.org/mtd-2.6 2009-09-23 10:07:49 -07:00
pps
…
prctl
…
s390
…
scheduler
…
scsi trivial: fix typos "man[ae]g?ment" -> "management" 2009-09-21 15:14:56 +02:00
serial
…
sh
…
sound Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6 2009-10-03 11:25:30 -07:00
sparc
…
spi spi: fix spelling of `automatically' in documentation 2009-09-23 07:39:44 -07:00
sysctl Merge branch 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6 2009-09-24 07:53:22 -07:00
telephony
…
thermal
…
timers
…
trace Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
uml
…
usb USB: Fix sysfs paths in documentation 2009-09-23 06:46:41 -07:00
video4linux Documentation/: fix warnings from -Wmissing-prototypes in HOSTCFLAGS 2009-09-23 07:39:28 -07:00
vm Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2009-09-24 08:32:11 -07:00
w1 ds2482: Discard obsolete detect method 2009-10-04 22:53:41 +02:00
watchdog Documentation/: fix warnings from -Wmissing-prototypes in HOSTCFLAGS 2009-09-23 07:39:28 -07:00
wimax
…
x86 USB: ehci-dbgp,documentation: Documentation updates for ehci-dbgp 2009-09-23 06:46:39 -07:00
zh_CN
…
00-INDEX
…
BUG-HUNTING
…
Changes
…
CodingStyle
…
DMA-API.txt
…
DMA-ISA-LPC.txt
…
DMA-attributes.txt
…
DMA-mapping.txt
…
HOWTO
…
IO-mapping.txt
…
IPMI.txt
…
IRQ-affinity.txt
…
IRQ.txt
…
Intel-IOMMU.txt intel-iommu: Kill DMAR_BROKEN_GFX_WA option. 2009-09-19 09:37:23 -07:00
Makefile
…
ManagementStyle
…
SAK.txt
…
SELinux.txt
…
SM501.txt
…
SecurityBugs
…
Smack.txt
…
SubmitChecklist
…
SubmittingDrivers
…
SubmittingPatches docs: update patch size in SubmittingPatches 2009-10-01 16:11:12 -07:00
VGA-softcursor.txt
…
applying-patches.txt
…
atomic_ops.txt
…
bad_memory.txt
…
basic_profiling.txt
…
binfmt_misc.txt
…
braille-console.txt
…
bt8xxgpio.txt
…
btmrvl.txt
…
c2port.txt
…
cachetlb.txt
…
cpu-hotplug.txt
…
cpu-load.txt
…
cputopology.txt
…
credentials.txt
…
dcdbas.txt
…
debugging-modules.txt
…
debugging-via-ohci1394.txt
…
dell_rbu.txt
…
devices.txt
…
dmaengine.txt
…
dontdiff
…
dynamic-debug-howto.txt
…
edac.txt
…
eisa.txt
…
email-clients.txt
…
feature-removal-schedule.txt hwmon: Delete deprecated FSC drivers 2009-09-23 22:59:42 +02:00
flexible-arrays.txt
…
futex-requeue-pi.txt
…
gcov.txt trivial: fix typo in CONFIG_DEBUG_FS in gcov doc 2009-09-21 15:14:56 +02:00
gpio.txt gpiolib: allow poll() on value 2009-09-23 07:39:48 -07:00
highuid.txt
…
hw_random.txt
…
ics932s401
…
initrd.txt
…
intel_txt.txt
…
io-mapping.txt
…
io_ordering.txt
…
iostats.txt
…
irqflags-tracing.txt
…
isapnp.txt
…
java.txt
…
kernel-doc-nano-HOWTO.txt
…
kernel-docs.txt
…
kernel-parameters.txt udp: dynamically size hash tables at boot time 2009-10-07 22:00:22 -07:00
keys-request-key.txt
…
keys.txt
…
kmemcheck.txt
…
kmemleak.txt
…
kobject.txt
…
kprobes.txt
…
kref.txt
…
ldm.txt
…
leds-class.txt
…
leds-lp3944.txt
…
local_ops.txt
…
lockdep-design.txt
…
lockstat.txt
…
logo.gif
…
logo.txt
…
magic-number.txt
…
mca.txt
…
md.txt
…
memory-barriers.txt
…
memory-hotplug.txt
…
memory.txt Documentation/memory.txt: remove some very outdated recommendations 2009-09-22 07:17:26 -07:00
mono.txt
…
mutex-design.txt
…
nmi_watchdog.txt
…
nommu-mmap.txt
…
numastat.txt mm: fix NUMA accounting in numastat.txt 2009-09-22 07:17:39 -07:00
oops-tracing.txt
…
parport-lowlevel.txt
…
parport.txt
…
pi-futex.txt
…
pnp.txt
…
preempt-locking.txt
…
printk-formats.txt
…
prio_tree.txt
…
rbtree.txt
…
rfkill.txt
…
robust-futex-ABI.txt
…
robust-futexes.txt
…
rt-mutex-design.txt
…
rt-mutex.txt
…
rtc.txt rtc: add boot_timesource sysfs attribute 2009-09-23 07:39:46 -07:00
serial-console.txt
…
sgi-ioc4.txt
…
sgi-visws.txt
…
slow-work.txt
…
sparse.txt
…
spinlocks.txt
…
stable_api_nonsense.txt
…
stable_kernel_rules.txt
…
svga.txt
…
sysfs-rules.txt
…
sysrq.txt
…
tomoyo.txt
…
unaligned-memory-access.txt
…
unicode.txt
…
unshare.txt
…
vgaarbiter.txt
…
video-output.txt
…
volatile-considered-harmful.txt
…
voyager.txt
…
zorro.txt
…