linux

History

Paul Menage 8bab8dded6 cgroups: add cgroup support for enabling controllers at boot time The effects of cgroup_disable=foo are: - foo isn't auto-mounted if you mount all cgroups in a single hierarchy - foo isn't visible as an individually mountable subsystem As a result there will only ever be one call to foo->create(), at init time; all processes will stay in this group, and the group will never be mounted on a visible hierarchy. Any additional effects (e.g. not allocating metadata) are up to the foo subsystem. This doesn't handle early_init subsystems (their "disabled" bit isn't set be, but it could easily be extended to do so if any of the early_init systems wanted it - I think it would just involve some nastier parameter processing since it would occur before the command-line argument parser had been run. Hugh said: Ballpark figures, I'm trying to get this question out rather than processing the exact numbers: CONFIG_CGROUP_MEM_RES_CTLR adds 15% overhead to the affected paths, booting with cgroup_disable=memory cuts that back to 1% overhead (due to slightly bigger struct page). I'm no expert on distros, they may have no interest whatever in CONFIG_CGROUP_MEM_RES_CTLR=y; and the rest of us can easily build with or without it, or apply the cgroup_disable=memory patches. Unix bench's execl test result on x86_64 was == just after boot without mounting any cgroup fs.== mem_cgorup=off : Execl Throughput 43.0 3150.1 732.6 mem_cgroup=on : Execl Throughput 43.0 2932.6 682.0 == [lizf@cn.fujitsu.com: fix boot option parsing] Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Paul Menage <menage@google.com> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Cc: Pavel Emelyanov <xemul@openvz.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Hugh Dickins <hugh@veritas.com> Cc: Sudhir Kumar <skumar@linux.vnet.ibm.com> Cc: YAMAMOTO Takashi <yamamoto@valinux.co.jp> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-04-04 14:46:26 -07:00
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DocBook	…
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accounting	…
acpi	…
aoe	…
arm	…
auxdisplay	…
blackfin	…
block	…
cdrom	…
connector	…
console	…
controllers	…
cpu-freq	…
cpuidle	…
cris	…
crypto	…
device-mapper	…
driver-model	…
dvb	…
early-userspace	…
fault-injection	…
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filesystems	…
firmware_class	…
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hwmon	…
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kbuild	…
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m68k	…
make	…
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mn10300	…
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sh	…
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usb	…
video4linux	…
vm	…
w1	…
watchdog	…
x86_64	…
zh_CN	…
00-INDEX	…
BUG-HUNTING	…
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CodingStyle	…
DMA-API.txt	…
DMA-ISA-LPC.txt	…
DMA-mapping.txt	…
HOWTO	…
IO-mapping.txt	…
IPMI.txt	…
IRQ-affinity.txt	…
IRQ.txt	…
Intel-IOMMU.txt	…
MSI-HOWTO.txt	…
ManagementStyle	…
PCIEBUS-HOWTO.txt	…
README.DAC960	…
README.cycladesZ	…
SAK.txt	…
SM501.txt	…
SecurityBugs	…
Smack.txt	…
SubmitChecklist	…
SubmittingDrivers	…
SubmittingPatches	…
VGA-softcursor.txt	…
applying-patches.txt	…
atomic_ops.txt	…
basic_profiling.txt	…
binfmt_misc.txt	…
cachetlb.txt	…
cciss.txt	…
cgroups.txt	…
cli-sti-removal.txt	…
computone.txt	…
cpqarray.txt	…
cpu-hotplug.txt	…
cpu-load.txt	…
cpusets.txt	…
cputopology.txt	…
dcdbas.txt	…
debugging-modules.txt	…
debugging-via-ohci1394.txt	…
dell_rbu.txt	…
devices.txt	…
digiepca.txt	…
dontdiff	…
edac.txt	…
eisa.txt	…
email-clients.txt	…
exception.txt	…
feature-removal-schedule.txt	…
floppy.txt	…
gpio.txt	…
hayes-esp.txt	…
highuid.txt	…
hpet.txt	…
hw_random.txt	…
initrd.txt	…
io_ordering.txt	…
ioctl-number.txt	…
iostats.txt	…
irqflags-tracing.txt	…
isapnp.txt	…
java.txt	…
kernel-doc-nano-HOWTO.txt	…
kernel-docs.txt	…
kernel-parameters.txt	cgroups: add cgroup support for enabling controllers at boot time	2008-04-04 14:46:26 -07:00
keys-request-key.txt	…
keys.txt	…
kobject.txt	…
kprobes.txt	…
kref.txt	…
ldm.txt	…
leds-class.txt	…
local_ops.txt	…
lockdep-design.txt	…
lockstat.txt	…
logo.gif	…
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markers.txt	…
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md.txt	…
memory-barriers.txt	…
memory-hotplug.txt	…
memory.txt	…
mono.txt	…
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mtrr.txt	…
mutex-design.txt	…
nbd.txt	…
nfsroot.txt	…
nmi_watchdog.txt	…
nommu-mmap.txt	…
numastat.txt	…
oops-tracing.txt	…
paride.txt	…
parport-lowlevel.txt	…
parport.txt	…
pci-error-recovery.txt	…
pci.txt	…
pcieaer-howto.txt	…
pi-futex.txt	…
pnp.txt	…
preempt-locking.txt	…
prio_tree.txt	…
ramdisk.txt	…
rbtree.txt	…
rfkill.txt	…
riscom8.txt	…
robust-futex-ABI.txt	…
robust-futexes.txt	…
rocket.txt	…
rpc-cache.txt	…
rt-mutex-design.txt	…
rt-mutex.txt	…
rtc.txt	…
sched-rt-group.txt	…
serial-console.txt	…
sgi-ioc4.txt	…
sgi-visws.txt	…
smart-config.txt	…
sparse.txt	…
specialix.txt	…
spinlocks.txt	…
stable_api_nonsense.txt	…
stable_kernel_rules.txt	…
stallion.txt	…
svga.txt	…
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sysfs-rules.txt	…
sysrq.txt	…
tty.txt	…
unaligned-memory-access.txt	…
unicode.txt	…
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video-output.txt	…
volatile-considered-harmful.txt	…
voyager.txt	…
zorro.txt	…

README.cycladesZ

The Cyclades-Z must have firmware loaded onto the card before it will
operate.  This operation should be performed during system startup,

The firmware, loader program and the latest device driver code are
available from Cyclades at
    ftp://ftp.cyclades.com/pub/cyclades/cyclades-z/linux/