kernel-ark/Documentation
Rusty Russell 95c517c09b lguest: avoid sending interrupts to Guest when no activity occurs.
If we track how many buffers we've used, we can tell whether we really
need to interrupt the Guest.  This happens as a side effect of
spurious notifications.

Spurious notifications happen because it can take a while before the
Host thread wakes up and sets the VRING_USED_F_NO_NOTIFY flag, and
meanwhile the Guest can more notifications.

A real fix would be to use wake counts, rather than a suppression
flag, but the practical difference is generally in the noise: the
interrupt is usually coalesced into a pending one anyway so we just
save a system call which isn't clearly measurable.

				Secs	Spurious IRQS
1G TCP Guest->Host:		3.93	58
1M normal pings:		100	72
1M 1k pings (-l 120):		57	492904

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2009-06-12 22:27:12 +09:30
..
ABI Merge branch 'for-2.6.31' of git://git.kernel.dk/linux-2.6-block 2009-06-11 11:10:35 -07:00
accounting Documentation/accounting/getdelays.c: fix endless loop 2009-01-15 16:39:37 -08:00
acpi
aoe
arm Merge branch 'next-s3c-pm' of git://aeryn.fluff.org.uk/bjdooks/linux into devel 2009-03-26 22:44:43 +00:00
auxdisplay
blackfin Blackfin arch: Add document about bfin-gpio 2009-01-07 23:14:38 +08:00
block Removed reference to non-existing file Documentation/PCI/PCI-DMA-mapping.txt 2009-06-02 14:52:32 +02:00
blockdev mflash: initial support 2009-04-07 08:12:38 +02:00
cdrom
cgroups memcg: fix documentation 2009-04-13 15:04:33 -07:00
connector Documentation/connector/cn_test.c: don't use gfp_any() 2009-02-12 16:47:01 -08:00
console
cpu-freq [CPUFREQ] ondemand/conservative: sanitize sampling_rate restrictions 2009-02-24 22:47:31 -05:00
cpuidle
cris
crypto async_tx, dmaengine: document channel allocation and api rework 2009-01-05 18:10:19 -07:00
development-process Fix a typo in the development process document. 2009-01-08 16:32:13 -07:00
device-mapper
DocBook Merge commit 'v2.6.30-rc6' into tracing/core 2009-05-18 10:15:35 +02:00
driver-model Driver Core: early platform driver 2009-04-16 16:17:10 -07:00
dvb V4L/DVB (11138): get_dvb_firmware: add support for downloading the cx2584x firmware for pvrusb2 2009-03-30 12:43:31 -03:00
early-userspace
fault-injection
fb uvesafb: documentation update 2009-04-07 08:31:09 -07:00
filesystems Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw 2009-06-11 10:36:12 -07:00
firmware_class
frv
hwmon hwmon: Update documentation on fan_max 2009-06-01 13:46:50 +02:00
i2c Move the pcf8591 driver to hwmon 2009-03-30 21:46:43 +02:00
i2o
ia64 trivial: Fix misspelling of firmware 2009-03-30 15:21:59 +02:00
ide ide: update warm-plug HOWTO 2009-01-06 17:21:00 +01:00
infiniband IPoIB: Document newish features 2009-04-08 13:52:01 -07:00
input Input: multitouch - augment event semantics documentation 2009-05-23 09:53:26 -07:00
ioctl V4L/DVB (10870a): remove all references for video_decoder.h 2009-03-30 12:43:15 -03:00
isdn Add reference to CAPI 2.0 standard 2009-04-27 05:37:39 -07:00
ja_JP Sync patch for jp_JP/stable_kernel_rules.txt 2009-01-28 15:55:48 -08:00
kbuild kbuild: introduce subdir-ccflags-y 2009-04-19 11:12:12 +02:00
kdump
ko_KR
laptops thinkpad-acpi: bump up version to 0.23 2009-04-18 01:19:54 -04:00
lguest lguest: avoid sending interrupts to Guest when no activity occurs. 2009-06-12 22:27:12 +09:30
m68k
make
mips ide: remove unused CONFIG_BLK_DEV_IDE_AU1XXX_SEQTS_PER_RQ 2009-01-14 19:19:03 +01:00
misc-devices drivers/misc/isl29003.c: driver for the ISL29003 ambient light sensor 2009-04-01 08:59:18 -07:00
mn10300
mtd
namespaces
netlabel
networking Doc: fixed descriptions on /proc/sys/net/core/* and /proc/sys/net/unix/* 2009-05-17 21:19:31 -07:00
parisc
PCI PCI MSI: Add example request loop to MSI-HOWTO.txt 2009-03-20 11:35:04 -07:00
pcmcia
power
powerpc Merge branch 'merge' of git://git.secretlab.ca/git/linux-2.6 into merge 2009-04-22 13:02:09 +10:00
prctl
RCU rcu: Update RCU tracing documentation for __rcu_pending 2009-04-14 11:33:43 +02:00
s390 documentation: update s390 header file paths 2009-01-06 15:59:28 -08:00
scheduler sched: fix typo in sched-rt-group.txt file 2009-05-29 16:21:09 +02:00
scsi [SCSI] aacraid driver update 2009-04-03 09:23:11 -05:00
serial
sh
sound Merge branch 'fix/pcm-jiffies-check' into for-linus 2009-05-27 16:51:27 +02:00
sparc
spi spi: documentation: emphasise spi_master.setup() semantics 2009-04-21 13:41:50 -07:00
sysctl Merge branch 'master' into next 2009-05-22 18:40:59 +10:00
telephony
thermal
timers
trace Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-06-10 19:53:40 -07:00
uml
usb USB: usbmon: Add binary API v1 2009-03-24 16:20:36 -07:00
video4linux V4L/DVB (11373): v4l2-common: add explicit v4l2_device pointer as first arg to new_(probed)_subdev 2009-04-06 21:44:24 -03:00
vm mm: add documentation describing what tsk->active_mm means vs tsk->mm 2009-04-13 15:04:32 -07:00
w1 w1: send status messages after command processing 2009-01-08 08:31:14 -08:00
watchdog
wimax i2400m: documentation and instructions for usage 2009-01-07 10:00:18 -08:00
x86 Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-06-10 16:13:20 -07:00
zh_CN
00-INDEX trivial: fix where cgroup documentation is not correctly referred to 2009-03-30 15:22:02 +02:00
applying-patches.txt
atomic_ops.txt
bad_memory.txt
basic_profiling.txt
binfmt_misc.txt
braille-console.txt
bt8xxgpio.txt
BUG-HUNTING
c2port.txt
cachetlb.txt
Changes Documentation/Changes: add required versions for new filesystems 2009-01-29 18:19:30 -08:00
CodingStyle fix emacs indenting howto filename expansion 2009-01-29 18:19:29 -08:00
cpu-hotplug.txt
cpu-load.txt
cputopology.txt cpumask: Use topology_core_cpumask()/topology_thread_cpumask() 2009-01-11 19:12:49 +01:00
credentials.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt trivial: fix an -> a typos in documentation and comments 2009-01-06 11:28:07 +01:00
devices.txt lanana: assign a device name and numbering for MAX3100 2009-04-07 08:44:05 -07:00
DMA-API.txt dma-debug: add documentation for the driver filter 2009-06-02 16:21:42 +02:00
DMA-attributes.txt
DMA-ISA-LPC.txt
DMA-mapping.txt dma-mapping: update the old macro DMA_nBIT_MASK related documentations 2009-04-07 08:31:12 -07:00
dmaengine.txt async_tx, dmaengine: document channel allocation and api rework 2009-01-05 18:10:19 -07:00
dontdiff dontdiff: Fix asm exclude 2009-03-26 15:45:43 -07:00
dynamic-debug-howto.txt Dynamic debug: allow simple quoting of words 2009-03-24 16:38:27 -07:00
edac.txt
eisa.txt
email-clients.txt
exception.txt
feature-removal-schedule.txt i2c-voodoo3: Deprecate in favor of tdfxfb 2009-04-13 17:02:13 +02:00
futex-requeue-pi.txt futex: add requeue-pi documentation 2009-05-09 07:12:50 +02:00
gpio.txt gpio: gpio_{request,free}() now required (feature removal) 2009-04-02 19:04:51 -07:00
highuid.txt
HOWTO
hw_random.txt
ics932s401
initrd.txt
Intel-IOMMU.txt
io_ordering.txt
io-mapping.txt
IO-mapping.txt Documentation: move DMA-mapping.txt to Doc/PCI/ 2009-01-29 18:19:29 -08:00
iostats.txt
IPMI.txt
IRQ-affinity.txt
IRQ.txt
irqflags-tracing.txt
isapnp.txt
java.txt
kernel-doc-nano-HOWTO.txt kernel-doc: restrict syntax for private: and public: 2009-05-02 15:36:10 -07:00
kernel-docs.txt
kernel-parameters.txt Merge branch 'for-linus' of git://linux-arm.org/linux-2.6 2009-06-11 14:15:57 -07:00
keys-request-key.txt
keys.txt
kmemleak.txt kmemleak: Add documentation on the memory leak detector 2009-06-11 17:03:29 +01:00
kobject.txt kobject: Make Documentation/kobject.txt a little more coherent. 2009-01-06 10:44:32 -08:00
kprobes.txt kprobes: support kretprobe and jprobe per-probe disabling 2009-04-07 08:31:08 -07:00
kref.txt
ldm.txt
leds-class.txt
local_ops.txt
lockdep-design.txt locking: Documentation: lockdep-design.txt, fix note of state bits 2009-04-26 18:21:24 +02:00
lockstat.txt
logo.gif Revert "linux.conf.au 2009: Tuz" 2009-04-27 12:00:27 -07:00
logo.txt Revert "linux.conf.au 2009: Tuz" 2009-04-27 12:00:27 -07:00
magic-number.txt documentation: update header file paths 2009-01-06 15:59:28 -08:00
Makefile
ManagementStyle
markers.txt
mca.txt
md.txt Documentation/md.txt update 2009-03-31 15:18:37 +11:00
memory-barriers.txt sched: Document memory barriers implied by sleep/wake-up primitives 2009-04-29 14:15:55 +02:00
memory-hotplug.txt mm: show node to memory section relationship with symlinks in sysfs 2009-01-06 15:59:00 -08:00
memory.txt
mono.txt
mutex-design.txt
nmi_watchdog.txt
nommu-mmap.txt NOMMU: Make mmap allocation page trimming behaviour configurable. 2009-01-08 12:04:47 +00:00
numastat.txt
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
SAK.txt
SecurityBugs
SELinux.txt
serial-console.txt
sgi-ioc4.txt
sgi-visws.txt
slow-work.txt Document the slow work thread pool 2009-04-03 16:42:35 +01:00
SM501.txt
Smack.txt smack: implement logging V3 2009-04-14 09:00:23 +10:00
sparse.txt Documentation: explain the difference between __bitwise and __bitwise__ 2009-04-11 08:18:11 +02:00
spinlocks.txt
stable_api_nonsense.txt
stable_kernel_rules.txt
SubmitChecklist
SubmittingDrivers
SubmittingPatches
svga.txt
sysfs-rules.txt Doc/sysfs-rules: Swap the order of the words so the sentence makes more sense 2009-05-08 19:22:20 -07:00
sysrq.txt Merge branch 'tracing/core-v2' into tracing-for-linus 2009-04-02 00:49:02 +02:00
tomoyo.txt tomoyo: add Documentation/tomoyo.txt 2009-04-14 09:14:58 +10:00
unaligned-memory-access.txt
unicode.txt
unshare.txt
VGA-softcursor.txt
video-output.txt
volatile-considered-harmful.txt
voyager.txt
zorro.txt