Peter W Morreale fafd688e4c mm: add /proc controls for pdflush threads ... Add /proc entries to give the admin the ability to control the minimum and maximum number of pdflush threads. This allows finer control of pdflush on both large and small machines. The rationale is simply one size does not fit all. Admins on large and/or small systems may want to tune the min/max pdflush thread count to best suit their needs. Right now the min/max is hardcoded to 2/8. While probably a fair estimate for smaller machines, large machines with large numbers of CPUs and large numbers of filesystems/block devices may benefit from larger numbers of threads working on different block devices. Even if the background flushing algorithm is radically changed, it is still likely that multiple threads will be involved and admins would still desire finer control on the min/max other than to have to recompile the kernel. The patch adds '/proc/sys/vm/nr_pdflush_threads_min' and '/proc/sys/vm/nr_pdflush_threads_max' with r/w permissions. The minimum value for nr_pdflush_threads_min is 1 and the maximum value is the current value of nr_pdflush_threads_max. This minimum is required since additional thread creation is performed in a pdflush thread itself. The minimum value for nr_pdflush_threads_max is the current value of nr_pdflush_threads_min and the maximum value can be 1000. Documentation/sysctl/vm.txt is also updated. [akpm@linux-foundation.org: fix comment, fix whitespace, use __read_mostly] Signed-off-by: Peter W Morreale <pmorreale@novell.com> Reviewed-by: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2009-04-07 08:31:03 -07:00
..
ABI	Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-04-05 11:04:19 -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	block: Repeated lines in switching-sched.txt	2009-03-26 11:01:28 +01:00
blockdev
cdrom
cgroups	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-04-03 15:24:35 -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
development-process	Fix a typo in the development process document.	2009-01-08 16:32:13 -07:00
device-mapper
DocBook	docbook: fix fatal filename error	2009-04-06 13:43:42 -07:00
driver-model	PATCH [1/2] Documentation/driver-model/device.txt: fix struct device_attribute	2009-02-22 09:27:15 -08:00
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	fbdev: remove cyblafb driver	2009-04-01 08:59:33 -07:00
filesystems	Merge branch 'for-2.6.30' of git://linux-nfs.org/~bfields/linux	2009-04-06 13:25:56 -07:00
firmware_class
frv
hwmon	hwmon: Add LTC4215 driver	2009-04-01 08:59:21 -07:00
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
infiniband
input
ioctl	V4L/DVB (10870a): remove all references for video_decoder.h	2009-03-30 12:43:15 -03:00
isdn	gigaset: documentation update	2009-04-06 17:07:57 -07:00
ja_JP	Sync patch for jp_JP/stable_kernel_rules.txt	2009-01-28 15:55:48 -08:00
kbuild	kbuild: fix kbuild.txt typos	2009-01-14 21:42:51 +01:00
kdump
ko_KR
laptops	Merge branch 'thinkpad-acpi' into release	2009-04-05 01:42:09 -04:00
lguest	lguest: barrier me harder	2009-03-30 21:55:26 +10:30
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	Neterion: Driver help file	2009-04-02 00:33:39 -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 git://git.infradead.org/mtd-2.6	2009-04-06 14:56:26 -07:00
prctl
RCU	Doc: Fix spelling in RCU/rculist_nulls.txt.	2009-04-02 01:33:51 -07:00
s390	documentation: update s390 header file paths	2009-01-06 15:59:28 -08:00
scheduler	trivial: fix where cgroup documentation is not correctly referred to	2009-03-30 15:22:02 +02:00
scsi	[SCSI] aacraid driver update	2009-04-03 09:23:11 -05:00
serial
sh
sound	Merge branch 'topic/oxygen' into for-linus	2009-03-24 00:36:17 +01:00
sparc
spi	hwmon: (lm70) Code streamlining and cleanup	2009-01-07 16:37:34 +01:00
sysctl	mm: add /proc controls for pdflush threads	2009-04-07 08:31:03 -07:00
telephony
thermal
timers
tracers	doc: mmiotrace.txt, buffer size control change	2009-02-15 20:05:13 +01:00
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	Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-04-05 11:04:19 -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 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2009-04-03 15:24:35 -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
devices.txt	LANANA: Fix dates	2009-04-06 14:54:17 -07:00
DMA-API.txt	dma-debug: Documentation update	2009-03-17 12:56:47 +01:00
DMA-attributes.txt
DMA-ISA-LPC.txt
DMA-mapping.txt	documentation: update header file paths	2009-01-06 15:59:28 -08:00
dmaengine.txt
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: Deprecate client_register and client_unregister methods	2009-04-06 18:12:24 +02:00
ftrace.txt	ftrace: fix documentation typo s/trace_max_latency/tracing_max_latency/	2009-03-08 16:50:07 +01:00
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: preferred ending marker and examples	2009-02-11 14:25:36 -08:00
kernel-docs.txt
kernel-parameters.txt	docs: alphabetize entries in kernel-parameters.txt	2009-04-06 13:43:43 -07:00
keys-request-key.txt
keys.txt
kobject.txt
kprobes.txt	kprobes: support probing module __exit function	2009-01-06 15:59:21 -08:00
kref.txt
ldm.txt
leds-class.txt
local_ops.txt
lockdep-design.txt	lockdep: get_user_chars() redo	2009-02-14 23:28:22 +01:00
lockstat.txt
logo.svg	linux.conf.au 2009: Tuz	2009-03-16 07:55:37 -07:00
logo.txt	linux.conf.au 2009: Tuz	2009-03-16 07:55:37 -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
memory-hotplug.txt
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: Add a new '-CIPSO' option to the network address label configuration	2009-03-28 15:01:37 +11:00
sparse.txt
spinlocks.txt
stable_api_nonsense.txt
stable_kernel_rules.txt
SubmitChecklist
SubmittingDrivers
SubmittingPatches
svga.txt
sysfs-rules.txt
sysrq.txt	Merge branch 'tracing/core-v2' into tracing-for-linus	2009-04-02 00:49:02 +02:00
tracepoints.txt	tracing: Documentation / sample code fixes for tracepoints	2009-03-24 22:32:12 +01:00
unaligned-memory-access.txt
unicode.txt
unshare.txt
VGA-softcursor.txt
video-output.txt
volatile-considered-harmful.txt
voyager.txt
zorro.txt