Paul Jackson 607717a65d cpuset: remove sched domain hooks from cpusets ... Remove the cpuset hooks that defined sched domains depending on the setting of the 'cpu_exclusive' flag. The cpu_exclusive flag can only be set on a child if it is set on the parent. This made that flag painfully unsuitable for use as a flag defining a partitioning of a system. It was entirely unobvious to a cpuset user what partitioning of sched domains they would be causing when they set that one cpu_exclusive bit on one cpuset, because it depended on what CPUs were in the remainder of that cpusets siblings and child cpusets, after subtracting out other cpu_exclusive cpusets. Furthermore, there was no way on production systems to query the result. Using the cpu_exclusive flag for this was simply wrong from the get go. Fortunately, it was sufficiently borked that so far as I know, almost no successful use has been made of this. One real time group did use it to affectively isolate CPUs from any load balancing efforts. They are willing to adapt to alternative mechanisms for this, such as someway to manipulate the list of isolated CPUs on a running system. They can do without this present cpu_exclusive based mechanism while we develop an alternative. There is a real risk, to the best of my understanding, of users accidentally setting up a partitioned scheduler domains, inhibiting desired load balancing across all their CPUs, due to the nonobvious (from the cpuset perspective) side affects of the cpu_exclusive flag. Furthermore, since there was no way on a running system to see what one was doing with sched domains, this change will be invisible to any using code. Unless they have real insight to the scheduler load balancing choices, they will be unable to detect that this change has been made in the kernel's behaviour. Initial discussion on lkml of this patch has generated much comment. My (probably controversial) take on that discussion is that it has reached a rough concensus that the current cpuset cpu_exclusive mechanism for defining sched domains is borked. There is no concensus on the replacement. But since we can remove this mechanism, and since its continued presence risks causing unwanted partitioning of the schedulers load balancing, we should remove it while we can, as we proceed to work the replacement scheduler domain mechanisms. Signed-off-by: Paul Jackson <pj@sgi.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Christoph Lameter <clameter@engr.sgi.com> Cc: Dinakar Guniguntala <dino@in.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2007-10-16 09:43:09 -07:00
..
amba
byteorder
dvb
hdlc
isdn
lockd
mlx4
mmc
mtd	[MTD] [NOR] fix ctrl-alt-del can't reboot for intel flash bug	2007-10-13 14:36:18 +01:00
netfilter	[NETFILTER]: Replace sk_buff ** with sk_buff *	2007-10-15 12:26:29 -07:00
netfilter_arp	[NETFILTER]: Replace sk_buff ** with sk_buff *	2007-10-15 12:26:29 -07:00
netfilter_bridge	[NETFILTER]: Replace sk_buff ** with sk_buff *	2007-10-15 12:26:29 -07:00
netfilter_ipv4	[NETFILTER]: Replace sk_buff ** with sk_buff *	2007-10-15 12:26:29 -07:00
netfilter_ipv6	[NETFILTER]: Replace sk_buff ** with sk_buff *	2007-10-15 12:26:29 -07:00
nfsd
raid
rtc
spi
ssb
sunrpc	Merge git://git.linux-nfs.org/pub/linux/nfs-2.6	2007-10-15 10:47:35 -07:00
tc_act
tc_ematch
usb	docbook: fix usb content	2007-10-15 17:56:36 -07:00
8250_pci.h
a.out.h
ac97_codec.h
acct.h
acpi_pmtmr.h
acpi.h
adb.h
adfs_fs_i.h
adfs_fs_sb.h
adfs_fs.h
aer.h
affs_hardblocks.h
agp_backend.h
agpgart.h	long vs. unsigned long - low-hanging fruits in drivers	2007-10-14 12:41:51 -07:00
aio_abi.h
aio.h
amifd.h
amifdreg.h
amigaffs.h
anon_inodes.h
apm_bios.h
apm-emulation.h
arcdevice.h
arcfb.h
async_tx.h
ata.h
atalk.h
atm_eni.h
atm_he.h
atm_idt77105.h
atm_nicstar.h
atm_suni.h
atm_tcp.h
atm_zatm.h
atm.h
atmapi.h
atmarp.h
atmbr2684.h
atmclip.h
atmdev.h
atmel_pdc.h
atmioc.h
atmlec.h
atmmpc.h
atmppp.h
atmsap.h
atmsvc.h
attribute_container.h
audit.h
auto_fs4.h
auto_fs.h
auxvec.h
ax25.h
b1lli.h
b1pcmcia.h
backing-dev.h
backlight.h
baycom.h
bcd.h
bfs_fs.h
binfmts.h
bio.h
bit_spinlock.h
bitmap.h
bitops.h	I/OAT: Add support for MSI and MSI-X	2007-10-16 09:43:09 -07:00
bitrev.h
blkdev.h
blkpg.h
blktrace_api.h
blockgroup_lock.h
bootmem.h
bottom_half.h
bpqether.h
bsg.h
buffer_head.h	fs: restore nobh	2007-10-16 09:42:58 -07:00
bug.h
cache.h
calc64.h
capability.h
capi.h
cciss_ioctl.h
cd1400.h
cdev.h
cdk.h
cdrom.h
cfag12864b.h
chio.h
circ_buf.h
clk.h
clockchips.h	clockevents: introduce force broadcast notifier	2007-10-14 22:57:45 +02:00
clocksource.h
cm4000_cs.h
cn_proc.h
coda_cache.h
coda_fs_i.h
coda_linux.h
coda_psdev.h
coda.h
coff.h
com20020.h
compat.h
compiler-gcc3.h
compiler-gcc4.h
compiler-gcc.h
compiler-intel.h
compiler.h
completion.h
comstats.h
concap.h
configfs.h
connector.h
console_struct.h
console.h
consolemap.h
const.h
cpu.h
cpufreq.h
cpumask.h
cpuset.h	Memoryless nodes: Use N_HIGH_MEMORY for cpusets	2007-10-16 09:42:59 -07:00
cramfs_fs_sb.h
cramfs_fs.h
crash_dump.h
crc7.h
crc16.h
crc32.h
crc32c.h
crc-ccitt.h
crc-itu-t.h
crypto.h
cryptohash.h
ctype.h
cuda.h
cyclades.h
cyclomx.h
cycx_cfm.h
cycx_drv.h
cycx_x25.h
dca.h	DCA: Add Direct Cache Access driver	2007-10-16 09:43:09 -07:00
dcache.h
dccp.h
dcookies.h
debug_locks.h
debugfs.h
delay.h
delayacct.h
device-mapper.h
device.h
devpts_fs.h
dio.h
dirent.h
display.h
dlm_device.h
dlm_netlink.h
dlm.h
dm9000.h
dm-ioctl.h
dma-mapping.h	introduce DMA_MASK_NONE as a signal for unable to do DMA	2007-10-16 09:42:50 -07:00
dmaengine.h
dmapool.h
dmi.h
dn.h
dnotify.h
dqblk_v1.h
dqblk_v2.h
dqblk_xfs.h
ds1wm.h
ds1286.h
ds17287rtc.h
dtlk.h
edac.h
edd.h
eeprom_93cx6.h
efi.h
efs_dir.h
efs_fs_i.h
efs_fs_sb.h
efs_fs.h
efs_vh.h
eisa.h
elevator.h
elf-em.h
elf-fdpic.h
elf.h
elfcore.h
elfnote.h
err.h
errno.h
errqueue.h
etherdevice.h
ethtool.h
eventfd.h
eventpoll.h
exportfs.h
ext2_fs_sb.h
ext2_fs.h
ext3_fs_i.h
ext3_fs_sb.h
ext3_fs.h
ext3_jbd.h
ext4_fs_extents.h
ext4_fs_i.h
ext4_fs_sb.h
ext4_fs.h
ext4_jbd2.h
fadvise.h
falloc.h
fault-inject.h
fb.h
fcdevice.h
fcntl.h
fd1772.h
fd.h
fddidevice.h
fdreg.h
fib_rules.h
file.h
filter.h
firewire-cdev.h
firewire-constants.h
firmware.h
flat.h
font.h
freezer.h
fs_enet_pd.h
fs_stack.h
fs_struct.h
fs_uart_pd.h
fs.h	fs: remove some AOP_TRUNCATED_PAGE	2007-10-16 09:42:58 -07:00
fsl_devices.h
fsnotify.h
fuse.h
futex.h
gameport.h
gen_stats.h
genalloc.h
generic_acl.h
generic_serial.h
genetlink.h
genhd.h
getcpu.h
gfp.h	Print out statistics in relation to fragmentation avoidance to /proc/pagetypeinfo	2007-10-16 09:43:00 -07:00
gfs2_ondisk.h
gigaset_dev.h
gpio_keys.h
gpio_mouse.h
hardirq.h
harrier_defs.h
hash.h
hayesesp.h
hdlc.h
hdlcdrv.h	long vs. unsigned long - low-hanging fruits in drivers	2007-10-14 12:41:51 -07:00
hdpu_features.h
hdreg.h
hdsmart.h
hid-debug.h
hid.h	HID: fix HIDIOCGRDESC memory access in hidraw	2007-10-15 08:12:00 -07:00
hiddev.h
hidraw.h	HID: fix HIDIOCGRDESC memory access in hidraw	2007-10-15 08:12:00 -07:00
highmem.h
highuid.h
hil_mlc.h
hil.h
hippidevice.h
hp_sdc.h
hpet.h
hrtimer.h
htirq.h
hugetlb.h	hugetlb: Add hugetlb_dynamic_pool sysctl	2007-10-16 09:43:02 -07:00
hw_random.h
hwmon-sysfs.h
hwmon-vid.h
hwmon.h
hysdn_if.h
i2c-algo-bit.h
i2c-algo-pca.h
i2c-algo-pcf.h
i2c-algo-sgi.h
i2c-dev.h	i2c: Move i2c-dev interfaces to i2c-dev.h	2007-10-13 23:56:32 +02:00
i2c-gpio.h
i2c-id.h
i2c-ocores.h
i2c-pnx.h
i2c-pxa.h
i2c.h	i2c: Rename the PEC functionality bit	2007-10-13 23:56:33 +02:00
i2o-dev.h
i2o.h
i8k.h
ibmtr.h
icmp.h
icmpv6.h
ide.h	ide: move ide_config_drive_speed() calls to upper layers (take 2)	2007-10-13 17:47:51 +02:00
idr.h
ieee80211.h
if_addr.h
if_arcnet.h
if_arp.h
if_bonding.h
if_bridge.h	[NETFILTER]: Replace sk_buff ** with sk_buff *	2007-10-15 12:26:29 -07:00
if_cablemodem.h
if_ec.h
if_eql.h
if_ether.h
if_fc.h
if_fddi.h
if_frad.h
if_hippi.h
if_infiniband.h
if_link.h
if_ltalk.h
if_macvlan.h
if_packet.h
if_plip.h
if_ppp.h
if_pppol2tp.h
if_pppox.h
if_shaper.h
if_slip.h
if_strip.h
if_tr.h
if_tun.h
if_tunnel.h
if_vlan.h
if_wanpipe.h
if.h
igmp.h
in6.h
in_route.h
in.h
inet_diag.h
inet_lro.h	fix endianness bug in inet_lro	2007-10-14 12:41:52 -07:00
inet.h
inetdevice.h
init_task.h
init.h	Add assembler equivalents to __init{,date}_refok	2007-10-16 09:42:49 -07:00
initrd.h
inotify.h
input-polldev.h
input.h	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2007-10-15 13:41:39 -07:00
interrupt.h	provide stubs for enable_irq_wake() and disable_irq_wake()	2007-10-16 09:42:50 -07:00
io.h
ioc3.h
ioc4.h
ioctl.h
ioport.h	memory unplug: memory hotplug cleanup	2007-10-16 09:43:01 -07:00
ioprio.h
ip6_tunnel.h
ip.h
ipc.h
ipmi_msgdefs.h
ipmi_smi.h
ipmi.h
ipsec.h
ipv6_route.h
ipv6.h
ipx.h
irda.h
irq_cpustat.h
irq.h
irqflags.h
irqreturn.h
isa.h
isapnp.h
isdn_divertif.h
isdn_ppp.h
isdn.h	[ISDN]: Remove local copy of device name to make sure renames work.	2007-10-15 12:26:37 -07:00
isdnif.h
isicom.h
iso_fs.h
istallion.h
ivtv.h
ivtvfb.h
ixjuser.h
jbd2.h
jbd.h	docbook: fix filesystems content	2007-10-15 17:56:36 -07:00
jffs2.h
jhash.h
jiffies.h	slow down printk during boot	2007-10-16 09:42:49 -07:00
journal-head.h
joystick.h
kallsyms.h
kbd_diacr.h
kbd_kern.h
Kbuild
kd.h
kdebug.h
kdev_t.h
kernel_stat.h	sched: guest CPU accounting: add guest-CPU /proc/stat field	2007-10-15 17:00:19 +02:00
kernel.h	memory unplug: page offline	2007-10-16 09:43:02 -07:00
kernelcapi.h
kexec.h
key-ui.h
key.h
keyboard.h
keyctl.h
kfifo.h
klist.h
kmalloc_sizes.h
kmod.h
kobj_map.h
kobject.h
kprobes.h
kref.h
ks0108.h
kthread.h
ktime.h
kvm_para.h
kvm.h	KVM: Replace enum by #define	2007-10-13 10:18:29 +02:00
lapb.h
latency.h
lcd.h
leds.h
lguest_bus.h
lguest_launcher.h
lguest.h
libata.h
libps2.h
license.h
limits.h
linkage.h
linux_logo.h
list.h
llc.h
lm_interface.h
lock_dlm_plock.h
lockdep.h
log2.h
loop.h
lp.h
lzo.h
m41t00.h
m48t86.h
magic.h
major.h
maple.h
matroxfb.h
mbcache.h
mc6821.h
mc146818rtc.h
mca-legacy.h
mca.h
mdio-bitbang.h
memory_hotplug.h	fix memory hot remove not configured case.	2007-10-16 09:43:02 -07:00
memory.h
mempolicy.h	mm/mempolicy.c: cleanups	2007-10-16 09:43:03 -07:00
mempool.h
meye.h
migrate.h
mii.h
minix_fs.h
miscdevice.h
mm_inline.h
mm_types.h	SLUB: Move page->offset to kmem_cache_cpu->offset	2007-10-16 09:43:01 -07:00
mm.h	mm/shmem.c: make 3 functions static	2007-10-16 09:43:03 -07:00
mman.h
mmtimer.h
mmzone.h	memory unplug: page isolation	2007-10-16 09:43:02 -07:00
mnt_namespace.h
mod_devicetable.h	i2c: Kill struct i2c_device_id	2007-10-13 23:56:29 +02:00
module.h
moduleloader.h
moduleparam.h
mount.h
mpage.h
mqueue.h
mroute.h
msdos_fs.h
msg.h
msi.h
mtio.h
mutex-debug.h
mutex.h
mv643xx.h
n_r3964.h
namei.h
nbd.h
ncp_fs_i.h
ncp_fs_sb.h
ncp_fs.h
ncp_mount.h
ncp_no.h
ncp.h
neighbour.h
net.h
netdevice.h	net core: fix kernel-doc for new function parameters	2007-10-13 09:52:26 -07:00
netfilter_arp.h
netfilter_bridge.h
netfilter_decnet.h
netfilter_ipv4.h	[NETFILTER]: Replace sk_buff ** with sk_buff *	2007-10-15 12:26:29 -07:00
netfilter_ipv6.h
netfilter.h	[NETFILTER]: Replace sk_buff ** with sk_buff *	2007-10-15 12:26:29 -07:00
netlink.h
netpoll.h
netrom.h
nfs2.h
nfs3.h
nfs4_acl.h
nfs4_mount.h
nfs4.h
nfs_fs_i.h
nfs_fs_sb.h
nfs_fs.h
nfs_idmap.h
nfs_mount.h
nfs_page.h
nfs_xdr.h
nfs.h
nfsacl.h
nfsd_idmap.h
nl80211.h
nls.h
nmi.h
node.h
nodemask.h	Memoryless nodes: Add N_CPU node state	2007-10-16 09:42:58 -07:00
notifier.h
nsc_gpio.h
nsproxy.h
nubus.h
numa.h
nvram.h
of_device.h
of_platform.h
of.h
oom.h
oprofile.h
page-flags.h
page-isolation.h	memory unplug: page isolation	2007-10-16 09:43:02 -07:00
pageblock-flags.h	memory unplug: page isolation	2007-10-16 09:43:02 -07:00
pagemap.h	fs: introduce write_begin, write_end, and perform_write aops	2007-10-16 09:42:55 -07:00
pagevec.h
param.h
parport_pc.h
parport.h
parser.h
pata_platform.h
patchkey.h
pci_hotplug.h
pci_ids.h	I/OAT: New device ids	2007-10-16 09:43:09 -07:00
pci_regs.h
pci-acpi.h
pci.h
pcieport_if.h
pda_power.h
percpu_counter.h
percpu.h
personality.h
pfkeyv2.h
pfn.h
pg.h
phantom.h
phonedev.h
phy_fixed.h
phy.h
pid_namespace.h
pid.h
pipe_fs_i.h
pkt_cls.h
pkt_sched.h
pktcdvd.h
platform_device.h
plist.h
pm_legacy.h
pm.h
pmu.h
pnp.h
pnpbios.h
poison.h
poll.h
posix_acl_xattr.h
posix_acl.h
posix_types.h
posix-timers.h
power_supply.h
ppdev.h
ppp_channel.h
ppp_defs.h
ppp-comp.h
prctl.h
preempt.h
prefetch.h
prio_tree.h
proc_fs.h
profile.h
ps2esdi.h
ptrace.h
qnx4_fs.h
qnxtypes.h
quicklist.h
quota.h
quotaio_v1.h
quotaio_v2.h
quotaops.h
radeonfb.h
radix-tree.h	radix-tree: use indirect bit	2007-10-16 09:42:53 -07:00
raid_class.h
ramfs.h
random.h
raw.h
rbtree.h
rcupdate.h
reboot.h
reciprocal_div.h
reiserfs_acl.h
reiserfs_fs_i.h
reiserfs_fs_sb.h	more low-hanging fruits - kernel, fs, lib signedness	2007-10-14 12:41:52 -07:00
reiserfs_fs.h
reiserfs_xattr.h
relay.h
resource.h
resume-trace.h
rfkill.h
rio_drv.h
rio_ids.h
rio_regs.h
rio.h
rmap.h
romfs_fs.h
root_dev.h
rose.h
route.h
rslib.h
rtc-v3020.h
rtc.h
rtmutex.h
rtnetlink.h
rwsem-spinlock.h
rwsem.h
rxrpc.h
sc26198.h
scatterlist.h
scc.h
sched.h	cpuset: remove sched domain hooks from cpusets	2007-10-16 09:43:09 -07:00
screen_info.h
sctp.h
scx200_gpio.h	long vs. unsigned long - low-hanging fruits in drivers	2007-10-14 12:41:51 -07:00
scx200.h
sdla.h
seccomp.h
securebits.h
security.h
selection.h
selinux_netlink.h
selinux.h
sem.h
seq_file.h
seqlock.h
serial167.h
serial_8250.h
serial_core.h	wake up from a serial port	2007-10-16 09:42:50 -07:00
serial_pnx8xxx.h
serial_reg.h
serial.h
serialP.h
serio.h
shm.h
shmem_fs.h
signal.h
signalfd.h
skbuff.h	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6	2007-10-15 14:06:58 -07:00
slab_def.h
slab.h	Group short-lived and reclaimable kernel allocations	2007-10-16 09:43:00 -07:00
slob_def.h
slub_def.h	SLUB: Optimize cacheline use for zeroing	2007-10-16 09:43:01 -07:00
sm501-regs.h
sm501.h
smb_fs_i.h
smb_fs_sb.h
smb_fs.h
smb_mount.h
smb.h
smbno.h
smp_lock.h
smp.h
snmp.h
socket.h
sockios.h
som.h
sonet.h
sony-laptop.h
sonypi.h
sort.h
sound.h
soundcard.h
spinlock_api_smp.h
spinlock_api_up.h
spinlock_types_up.h
spinlock_types.h
spinlock_up.h
spinlock.h
splice.h
srcu.h
stacktrace.h
stallion.h	long vs. unsigned long - low-hanging fruits in drivers	2007-10-14 12:41:51 -07:00
start_kernel.h
stat.h
statfs.h
stddef.h
stop_machine.h
string.h
stringify.h
superhyway.h
suspend.h
svga.h
swap.h
swapops.h
synclink.h
sys.h
syscalls.h
sysctl.h
sysdev.h
sysfs.h
sysrq.h
sysv_fs.h
task_io_accounting_ops.h
task_io_accounting.h
taskstats_kern.h
taskstats.h
tc.h
tcp.h	[TCP]: Make snd_cwnd_cnt 32-bit	2007-10-15 12:59:43 -07:00
telephony.h
termios.h
textsearch_fsm.h
textsearch.h
tfrc.h
thread_info.h
threads.h
ticable.h
tick.h
tifm.h
time.h
timer.h
timerfd.h
times.h
timex.h
tiocl.h
tipc_config.h
tipc.h
topology.h	sched: enable wake-idle on CONFIG_SCHED_MC=y	2007-10-15 17:00:19 +02:00
toshiba.h
transport_class.h
trdevice.h
tsacct_kern.h
tty_driver.h
tty_flip.h
tty_ldisc.h
tty.h
types.h
uaccess.h
udf_fs_i.h
udf_fs_sb.h
udf_fs.h
udp.h
ufs_fs_i.h
ufs_fs_sb.h
ufs_fs.h
uinput.h
uio_driver.h
uio.h
ultrasound.h
un.h
unistd.h
unwind.h
usb_usual.h
usb.h
usbdevice_fs.h
user_namespace.h
user.h
utime.h
uts.h
utsname.h
vermagic.h
vfs.h
via.h
video_decoder.h
video_encoder.h
video_output.h
videodev2.h
videodev.h
videotext.h
vmalloc.h
vmstat.h
vt_buffer.h
vt_kern.h
vt.h
wait.h
wanrouter.h
watchdog.h
wireless.h
workqueue.h
writeback.h	Merge git://git.linux-nfs.org/pub/linux/nfs-2.6	2007-10-15 10:47:35 -07:00
x25.h
xattr.h
xfrm.h
xilinxfb.h
yam.h
zconf.h
zlib.h
zorro_ids.h
zorro.h
zutil.h