Eric Dumazet 4b9d9be839 inetpeer: remove unused list ... Andi Kleen and Tim Chen reported huge contention on inetpeer unused_peers.lock, on memcached workload on a 40 core machine, with disabled route cache. It appears we constantly flip peers refcnt between 0 and 1 values, and we must insert/remove peers from unused_peers.list, holding a contended spinlock. Remove this list completely and perform a garbage collection on-the-fly, at lookup time, using the expired nodes we met during the tree traversal. This removes a lot of code, makes locking more standard, and obsoletes two sysctls (inet_peer_gc_mintime and inet_peer_gc_maxtime). This also removes two pointers in inet_peer structure. There is still a false sharing effect because refcnt is in first cache line of object [were the links and keys used by lookups are located], we might move it at the end of inet_peer structure to let this first cache line mostly read by cpus. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Andi Kleen <andi@firstfloor.org> CC: Tim Chen <tim.c.chen@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2011-06-08 17:05:30 -07:00
..
ABI	Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2	2011-05-26 10:55:15 -07:00
DocBook	Merge git://git.infradead.org/mtd-2.6	2011-05-27 20:06:53 -07:00
PCI	Fix common misspellings	2011-03-31 11:26:23 -03:00
RCU	rcu: Decrease memory-barrier usage based on semi-formal proof	2011-05-26 09:42:23 -07:00
accounting	getdelays: show average CPU/IO/SWAP/RECLAIM delays	2011-05-26 17:12:34 -07:00
acpi	ACPI: Split out custom_method functionality into an own driver	2011-05-29 01:50:40 -04:00
aoe	…
arm	Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into devel-stable	2011-05-25 21:47:48 +01:00
auxdisplay	…
blackfin	…
block	Fix common misspellings	2011-03-31 11:26:23 -03:00
blockdev	cciss: add cciss_tape_cmds module paramter	2011-05-06 08:23:59 -06:00
cdrom	…
cgroups	cgroup: remove the ns_cgroup	2011-05-26 17:12:34 -07:00
connector	…
console	…
cpu-freq	…
cpuidle	…
cris	…
crypto	…
development-process	docs: update the development process document	2011-03-25 14:30:31 -06:00
device-mapper	Fix common misspellings	2011-03-31 11:26:23 -03:00
devicetree	Merge branches 'devel', 'devel-stable' and 'fixes' into for-linus	2011-05-27 22:59:57 +01:00
driver-model	driver core: remove the driver-model structures from the documentation	2011-05-06 18:01:05 -07:00
dvb	Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6	2011-04-07 11:14:49 -07:00
early-userspace	…
fault-injection	…
fb	Fix common misspellings	2011-03-31 11:26:23 -03:00
filesystems	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6	2011-05-28 13:03:41 -07:00
firmware_class	…
frv	…
hid	HID: Move hiddev.txt to the new Documentation/hid directory	2011-03-22 11:43:51 +01:00
hwmon	hwmon: New driver for the SMSC EMC6W201	2011-05-25 20:43:33 +02:00
i2c	i2c-i801: SMBus patch for Intel Panther Point DeviceIDs	2011-05-24 20:58:49 +02:00
i2o	Fix common misspellings	2011-03-31 11:26:23 -03:00
ia64	Fix common misspellings	2011-03-31 11:26:23 -03:00
ide	…
infiniband	…
input	Input: elantech - describe further the protocol	2011-05-16 22:48:24 -07:00
ioctl	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc	2011-05-25 16:55:55 -07:00
isdn	Fix common misspellings	2011-03-31 11:26:23 -03:00
ja_JP	HOWTO: sync up Documentaion/ja_JP/HOWTO	2011-04-19 16:53:45 -07:00
kbuild	Merge branch 'kconfig-for-40' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6	2011-05-25 16:54:01 -07:00
kdump	…
ko_KR	…
laptops	acer-wmi: Delete out-of-date documentation	2011-05-27 12:36:46 -04:00
leds	Documentation: consolidate leds files to leds/ subdir	2011-04-04 17:51:47 -07:00
m68k	…
make	…
mips	Fix common misspellings	2011-03-31 11:26:23 -03:00
misc-devices	Fix common misspellings	2011-03-31 11:26:23 -03:00
mmc	mmc: MMC boot partitions support.	2011-05-24 21:01:21 -04:00
mn10300	…
mtd	…
namespaces	…
netlabel	…
networking	inetpeer: remove unused list	2011-06-08 17:05:30 -07:00
nfc	…
parisc	…
pcmcia	…
power	regulator: Remove supply_regulator_dev from machine configuration	2011-05-27 10:34:37 +01:00
powerpc	Fix common misspellings	2011-03-31 11:26:23 -03:00
pps	…
prctl	…
pti	Kernel documentation for the PTI feature.	2011-05-13 16:31:00 -07:00
ptp	ptp: Added a brand new class driver for ptp clocks.	2011-05-23 13:01:00 -07:00
rapidio	rapidio: add RapidIO documentation	2011-03-23 19:46:41 -07:00
s390	Documentation: fix minor typos/spelling	2011-04-04 17:51:47 -07:00
scheduler	sched, doc: Beef up load balancing description	2011-03-31 13:00:35 +02:00
scsi	[SCSI] megaraid_sas: Version and Changelog update	2011-05-24 12:36:06 -04:00
security	Create Documentation/security/,	2011-05-19 15:59:38 -07:00
serial	Fix common misspellings	2011-03-31 11:26:23 -03:00
sh	…
sound	Merge branch 'topic/hda' into for-linus	2011-05-22 10:01:35 +02:00
sparc	…
spi	Fix common misspellings	2011-03-31 11:26:23 -03:00
sysctl	coredump: add support for exe_file in core name	2011-05-26 17:12:36 -07:00
target	[SCSI] tcm_mod_builder.py: Fix generated *_drop_nodeacl() handler	2011-03-23 11:36:45 -05:00
telephony	Fix common misspellings	2011-03-31 11:26:23 -03:00
thermal	…
timers	doc: timers-howto: fix a typo ("unsgined")	2011-05-17 10:52:02 +02:00
trace	sched: Get rid of lock_depth	2011-04-24 13:18:38 +02:00
usb	Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6	2011-05-23 12:33:02 -07:00
video4linux	[media] uvcvideo: Add driver documentation	2011-05-20 09:30:36 -03:00
virtual	lguest: remove support for VIRTIO_F_NOTIFY_ON_EMPTY.	2011-05-30 11:14:12 +09:30
vm	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/djm/tmem	2011-05-26 10:50:56 -07:00
w1	Fix common misspellings	2011-03-31 11:26:23 -03:00
watchdog	Fix common misspellings	2011-03-31 11:26:23 -03:00
wimax	…
x86	x86, gart: Rename pci-gart_64.c to amd_gart_64.c	2011-05-10 17:22:06 +02:00
zh_CN	Translated Documentation/email-clients.txt	2011-05-06 17:59:20 -07:00
.gitignore	…
00-INDEX	Merge branch 'docs-security' into docs-move	2011-05-20 09:10:04 -07:00
BUG-HUNTING	…
Changes	Documentation/Changes: minor corrections	2011-03-22 17:44:17 -07:00
CodingStyle	Documentation/CodingStyle: flesh out if-else examples	2011-03-22 17:44:16 -07:00
DMA-API-HOWTO.txt	…
DMA-API.txt	…
DMA-ISA-LPC.txt	…
DMA-attributes.txt	…
HOWTO	Documentation: update LXR web link	2011-05-23 15:14:11 -07:00
IPMI.txt	…
IRQ-affinity.txt	bitmap, irq: add smp_affinity_list interface to /proc/irq	2011-05-25 08:39:45 -07:00
IRQ.txt	…
Intel-IOMMU.txt	…
Makefile	…
ManagementStyle	…
SAK.txt	…
SM501.txt	…
SecurityBugs	Fix common misspellings	2011-03-31 11:26:23 -03:00
SubmitChecklist	…
SubmittingDrivers	Fix common misspellings	2011-03-31 11:26:23 -03:00
SubmittingPatches	Documentation: update GregKH links	2011-05-23 15:14:11 -07:00
VGA-softcursor.txt	…
applying-patches.txt	…
atomic_ops.txt	Documentation/atomic_ops.txt: avoid volatile in sample code	2011-05-26 17:12:34 -07:00
bad_memory.txt	…
basic_profiling.txt	…
binfmt_misc.txt	…
braille-console.txt	…
bt8xxgpio.txt	…
btmrvl.txt	…
bus-virt-phys-mapping.txt	…
cachetlb.txt	mm: convert mm->cpu_vm_cpumask into cpumask_var_t	2011-05-25 08:39:21 -07:00
circular-buffers.txt	…
coccinelle.txt	…
cpu-hotplug.txt	Fix common misspellings	2011-03-31 11:26:23 -03:00
cpu-load.txt	…
cputopology.txt	…
dcdbas.txt	…
debugging-modules.txt	…
debugging-via-ohci1394.txt	…
dell_rbu.txt	Fix common misspellings	2011-03-31 11:26:23 -03:00
devices.txt	…
dmaengine.txt	dmaengine: Add API documentation for slave dma usage	2011-05-25 14:49:20 -07:00
dontdiff	Documentation: update dontdiff file	2011-05-23 15:14:11 -07:00
dynamic-debug-howto.txt	Merge branch 'docs-next' of git://git.lwn.net/linux-2.6	2011-03-27 19:46:59 -07:00
edac.txt	Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6	2011-04-07 11:14:49 -07:00
eisa.txt	Fix common misspellings	2011-03-31 11:26:23 -03:00
email-clients.txt	…
feature-removal-schedule.txt	Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6	2011-05-29 11:18:09 -07:00
flexible-arrays.txt	flex_array: flex_array_prealloc takes a number of elements, not an end	2011-04-28 16:12:47 -04:00
futex-requeue-pi.txt	…
gcov.txt	…
gpio.txt	…
highuid.txt	…
hw_random.txt	…
hwspinlock.txt	…
init.txt	…
initrd.txt	…
intel_txt.txt	…
io-mapping.txt	…
io_ordering.txt	…
iostats.txt	Documentation/iostats.txt: bit-size reference etc.	2011-03-23 20:44:18 +01:00
irqflags-tracing.txt	Fix common misspellings	2011-03-31 11:26:23 -03:00
isapnp.txt	…
java.txt	…
kernel-doc-nano-HOWTO.txt	…
kernel-docs.txt	…
kernel-parameters.txt	Merge git://git.infradead.org/iommu-2.6	2011-06-02 05:48:50 +09:00
kmemcheck.txt	…
kmemleak.txt	Documentation: update kmemleak arch. info	2011-04-04 17:51:46 -07:00
kobject.txt	…
kprobes.txt	…
kref.txt	…
ldm.txt	…
local_ops.txt	…
lockdep-design.txt	…
lockstat.txt	Documentation: Add statistics about nested locks	2011-05-28 17:03:29 +02:00
logo.gif	…
logo.txt	…
magic-number.txt	…
mca.txt	…
md.txt	md: Update documentation for sync_min and sync_max entries	2011-04-20 15:40:01 +10:00
media-framework.txt	Fix common misspellings	2011-03-31 11:26:23 -03:00
memory-barriers.txt	…
memory-hotplug.txt	…
memory.txt	…
mono.txt	…
mutex-design.txt	…
nmi_watchdog.txt	…
nommu-mmap.txt	…
numastat.txt	…
oops-tracing.txt	…
padata.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	…
serial-console.txt	…
sgi-ioc4.txt	…
sgi-visws.txt	…
sparse.txt	…
spinlocks.txt	…
stable_api_nonsense.txt	doc: stable_api_nonsense.txt: fix paragraph to make more sense.	2011-03-30 12:02:05 +02:00
stable_kernel_rules.txt	…
svga.txt	…
sysfs-rules.txt	…
sysrq.txt	…
unaligned-memory-access.txt	…
unicode.txt	…
unshare.txt	…
vgaarbiter.txt	Documentation: fix vgaarbiter.txt typos etc.	2011-05-23 15:14:11 -07:00
video-output.txt	…
volatile-considered-harmful.txt	…
workqueue.txt	workqueue: Document debugging tricks	2011-03-31 13:40:42 +02:00
xz.txt	…
zorro.txt	…