Nick Piggin c32ccd87bf [PATCH] inotify: lock avoidance with parent watch status in dentry ... Previous inotify work avoidance is good when inotify is completely unused, but it breaks down if even a single watch is in place anywhere in the system. Robin Holt notices that udev is one such culprit - it slows down a 512-thread application on a 512 CPU system from 6 seconds to 22 minutes. Solve this by adding a flag in the dentry that tells inotify whether or not its parent inode has a watch on it. Event queueing to parent will skip taking locks if this flag is cleared. Setting and clearing of this flag on all child dentries versus event delivery: this is no in terms of race cases, and that was shown to be equivalent to always performing the check. The essential behaviour is that activity occuring _after_ a watch has been added and _before_ it has been removed, will generate events. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Robert Love <rml@novell.com> Cc: John McCutchan <ttb@tentacle.dhs.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2006-03-25 08:22:53 -08:00
..
amba
byteorder
dvb
hdlc
isdn
lockd
mmc
mtd
netfilter	[NETFILTER]: futher {ip,ip6,arp}_tables unification	2006-03-22 13:56:56 -08:00
netfilter_arp	[NETFILTER]: futher {ip,ip6,arp}_tables unification	2006-03-22 13:56:56 -08:00
netfilter_bridge
netfilter_ipv4	[NETFILTER]: futher {ip,ip6,arp}_tables unification	2006-03-22 13:56:56 -08:00
netfilter_ipv6	[NETFILTER]: futher {ip,ip6,arp}_tables unification	2006-03-22 13:56:56 -08:00
nfsd
raid	[PATCH] DM: Fix bug: BIO_RW_BARRIER requests to md/raid1 hang.	2006-03-23 07:38:03 -08:00
spi
sunrpc
tc_act
tc_ematch
8250_pci.h
a.out.h
ac97_codec.h
acct.h
acpi.h
adb.h
adfs_fs_i.h
adfs_fs_sb.h
adfs_fs.h
affs_fs.h
affs_hardblocks.h
agp_backend.h
agpgart.h
aio_abi.h
aio.h
amifd.h
amifdreg.h
amigaffs.h
apm_bios.h
arcdevice.h
arcfb.h
ata.h	[PATCH] libata: Add the useful macros/constants needed for merging PATA stuff	2006-03-21 21:21:31 -05:00
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
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
awe_voice.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	[PATCH] bitmap: region cleanup	2006-03-24 07:33:20 -08:00
bitops.h
blkdev.h	[PATCH] Block queue IO tracing support (blktrace) as of 2006-03-23	2006-03-23 20:00:26 +01:00
blkpg.h
blktrace_api.h	[PATCH] Block queue IO tracing support (blktrace) as of 2006-03-23	2006-03-23 20:00:26 +01:00
blockgroup_lock.h
bootmem.h
bpqether.h
buffer_head.h
cache.h	[PATCH] Move read_mostly definition to asm/cache.h	2006-03-23 07:38:10 -08:00
calc64.h
capability.h
capi.h
cciss_ioctl.h
cd1400.h
cdev.h
cdk.h
cdrom.h	[PATCH] kill cdrom ->dev_ioctl method	2006-03-23 07:38:09 -08:00
chio.h
circ_buf.h
clk.h
cm4000_cs.h
cn_proc.h
cobalt-nvram.h
coda_cache.h
coda_fs_i.h
coda_linux.h
coda_proc.h
coda_psdev.h
coda.h
coff.h
com20020.h
compat_ioctl.h	[PATCH] Block queue IO tracing support (blktrace) as of 2006-03-23	2006-03-23 20:00:26 +01:00
compat.h
compiler-gcc3.h
compiler-gcc4.h
compiler-gcc.h
compiler-intel.h
compiler.h
completion.h
comstats.h
concap.h
config.h
configfs.h
connector.h
console_struct.h
console.h
consolemap.h
cpu.h
cpufreq.h
cpumask.h
cpuset.h	[PATCH] cpuset memory spread basic implementation	2006-03-24 07:33:22 -08:00
cramfs_fs_sb.h
cramfs_fs.h
crash_dump.h
crc16.h
crc32.h
crc32c.h
crc-ccitt.h
crypto.h
cryptohash.h
ctype.h
cuda.h
cyclades.h
cyclomx.h
cycx_cfm.h
cycx_drv.h
cycx_x25.h
dcache.h	[PATCH] inotify: lock avoidance with parent watch status in dentry	2006-03-25 08:22:53 -08:00
dccp.h
dcookies.h
debugfs.h
delay.h
devfs_fs_kernel.h
devfs_fs.h
device-mapper.h
device.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial	2006-03-22 10:58:05 -08:00
devpts_fs.h
dio.h
dirent.h
divert.h
dm9000.h
dm-ioctl.h
dma-mapping.h	[PATCH] Intruduce DMA_28BIT_MASK	2006-03-22 10:53:19 +01:00
dmapool.h
dmi.h
dn.h
dnotify.h
dqblk_v1.h
dqblk_v2.h
dqblk_xfs.h
ds1286.h
ds1742rtc.h
ds17287rtc.h
dtlk.h
edd.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-fdpic.h
elf.h
elfcore.h
err.h
errno.h
errqueue.h
etherdevice.h
ethtool.h
eventpoll.h	[PATCH] get_empty_filp tweaks, inline epoll_init_file()	2006-03-23 07:38:17 -08:00
ext2_fs_sb.h
ext2_fs.h
ext3_fs_i.h	[PATCH] convert ext3's truncate_sem to a mutex	2006-03-23 07:38:14 -08:00
ext3_fs_sb.h
ext3_fs.h	[PATCH] ext3_readdir: use generic readahead	2006-03-23 07:38:09 -08:00
ext3_jbd.h
fadvise.h	[PATCH] fadvise(): write commands	2006-03-24 07:33:25 -08:00
fb.h
fcdevice.h
fcntl.h
fd1772.h
fd.h
fddidevice.h
fdreg.h
file.h	[PATCH] Shrinks sizeof(files_struct) and better layout	2006-03-23 07:38:09 -08:00
filter.h
firmware.h
flat.h
font.h
fs_enet_pd.h
fs_struct.h
fs.h	[PATCH] Introduce FMODE_EXEC file flag	2006-03-25 08:22:51 -08:00
fsl_devices.h
fsnotify.h	[PATCH] inotify: lock avoidance with parent watch status in dentry	2006-03-25 08:22:53 -08:00
ftape-header-segment.h
ftape-vendors.h
ftape.h
fuse.h
futex.h
gameport.h
gen_stats.h
genalloc.h
generic_serial.h	[PATCH] sem2mutex: serial ->port_write_mutex	2006-03-23 07:38:14 -08:00
genetlink.h
genhd.h	[PATCH] more for_each_cpu() conversions	2006-03-23 07:38:17 -08:00
gfp.h
hardirq.h
harrier_defs.h
hash.h
hayesesp.h
hdlc.h
hdlcdrv.h
hdpu_features.h
hdreg.h
hdsmart.h
hiddev.h
highmem.h
highuid.h
hil_mlc.h
hil.h
hippidevice.h
hp_sdc.h
hpet.h
hpfs_fs.h
hrtimer.h
hugetlb.h	[PATCH] hugepage: is_aligned_hugepage_range() cleanup	2006-03-22 07:54:04 -08:00
hwmon-sysfs.h	[PATCH] hwmon: Refactor SENSOR_DEVICE_ATTR_2	2006-03-23 14:21:50 -08:00
hwmon-vid.h
hwmon.h
hysdn_if.h
i2c-algo-bit.h
i2c-algo-ite.h
i2c-algo-pca.h
i2c-algo-pcf.h
i2c-algo-sgi.h
i2c-algo-sibyte.h
i2c-dev.h
i2c-id.h	[PATCH] i2c: Drop the i2c-frodo bus driver	2006-03-23 14:21:54 -08:00
i2c-isa.h
i2c-pxa.h
i2c.h	[PATCH] i2c: Semaphore to mutex conversions, part 2	2006-03-23 14:21:51 -08:00
i2o-dev.h
i2o.h
i8k.h
ibmtr.h
icmp.h
icmpv6.h
ide.h	[PATCH] ide: Allow IDE interface to specify its not capable of 32-bit operations	2006-03-24 07:33:28 -08:00
idr.h
if_arcnet.h
if_arp.h
if_bonding.h
if_bridge.h
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_ltalk.h
if_packet.h
if_plip.h
if_ppp.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_common.h
if_wanpipe.h
if.h
igmp.h
in6.h
in_route.h
in.h
inet_diag.h
inet.h
inetdevice.h
init_task.h	[PATCH] Shrinks sizeof(files_struct) and better layout	2006-03-23 07:38:09 -08:00
init.h
initrd.h
inotify.h	[PATCH] inotify: lock avoidance with parent watch status in dentry	2006-03-25 08:22:53 -08:00
input.h
interrupt.h
io.h
ioc3.h
ioc4.h
ioctl32.h
ioctl.h
ioport.h
ioprio.h
ip6_tunnel.h
ip_mp_alg.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
isapnp.h
isdn_divertif.h
isdn_ppp.h
isdn.h
isdnif.h
isicom.h
iso_fs.h
istallion.h
ite_gpio.h
ixjuser.h
jbd.h	[PATCH] jbd: embed j_commit_timer in journal struct	2006-03-25 08:22:50 -08:00
jffs2_fs_i.h
jffs2_fs_sb.h
jffs2.h
jffs.h
jhash.h
jiffies.h
journal-head.h
joystick.h
kallsyms.h
kbd_diacr.h
kbd_kern.h
kd.h
kdev_t.h
kernel_stat.h
kernel.h	[PATCH] pause_on_oops command line option	2006-03-23 07:38:16 -08:00
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	[PATCH] sem2mutex: kprobes	2006-03-23 07:38:12 -08:00
kref.h
kthread.h
ktime.h
lapb.h
lcd.h
libata.h	[PATCH] libata: Remove dependence on host_set->dev for SAS	2006-03-24 10:18:43 -05:00
libps2.h
limits.h
linkage.h	[PATCH] abstract type/size specification for assembly	2006-03-24 07:33:25 -08:00
linux_logo.h
list.h
llc.h
loop.h	[PATCH] sem2mutex: drivers/block/loop.c	2006-03-23 07:38:12 -08:00
lp.h
major.h
matroxfb.h
mbcache.h
mc6821.h
mc146818rtc.h
mca-legacy.h
mca.h
memory_hotplug.h
memory.h
mempolicy.h	[PATCH] cpuset memory spread slab cache optimizations	2006-03-24 07:33:23 -08:00
mempool.h
meye.h
migrate.h	[PATCH] page migration reorg	2006-03-22 07:54:06 -08:00
mii.h
minix_fs.h
miscdevice.h
mm_inline.h	[PATCH] mm: less atomic ops	2006-03-22 07:53:57 -08:00
mm.h	[PATCH] mm: optimise page_count	2006-03-22 07:54:02 -08:00
mman.h
mmtimer.h
mmzone.h
mod_devicetable.h
module.h	[PATCH] Remove MODULE_PARM	2006-03-25 08:22:52 -08:00
moduleloader.h
moduleparam.h	[PATCH] kernel/params.c: make param_array() static	2006-03-25 08:22:52 -08:00
mount.h
mpage.h
mqueue.h
mroute.h
msdos_fs.h	[PATCH] fat_lock is used as a mutex, convert it to using the new mutex primitive	2006-03-23 07:38:15 -08:00
msg.h
mtio.h
mutex-debug.h
mutex.h
mv643xx.h
n_r3964.h
namei.h
namespace.h
nbd.h	[PATCH] sem2mutex: drivers/block/nbd.c	2006-03-23 07:38:13 -08:00
ncp_fs_i.h	[PATCH] sem2mutex: NCPFS	2006-03-23 07:38:14 -08:00
ncp_fs_sb.h	[PATCH] sem2mutex: NCPFS	2006-03-23 07:38:14 -08:00
ncp_fs.h
ncp_mount.h
ncp_no.h
ncp.h
net.h	[NET]: allow 32 bit socket ioctl in 64 bit kernel	2006-03-21 23:58:08 -08:00
netdevice.h
netfilter_arp.h
netfilter_bridge.h
netfilter_decnet.h
netfilter_ipv4.h
netfilter_ipv6.h
netfilter_logging.h
netfilter.h
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
nls.h
nmi.h
node.h
nodemask.h
notifier.h
nubus.h
numa.h
nvram.h
openprom_fs.h
oprofile.h
page-flags.h	[PATCH] mm: page_state comment more	2006-03-22 07:53:58 -08:00
pagemap.h	[PATCH] cpuset memory spread page cache implementation and hooks	2006-03-24 07:33:22 -08:00
pagevec.h
param.h
parport_pc.h
parport.h
parser.h
patchkey.h
pci_ids.h	[PATCH] Secure Digital Host Controller id and regs	2006-03-24 07:33:27 -08:00
pci_regs.h
pci-acpi.h
pci.h	[PATCH] PCI: fix pci_request_region[s] arg	2006-03-23 14:35:16 -08:00
pcieport_if.h
percpu_counter.h
percpu.h
personality.h
pfkeyv2.h
pg.h
phonedev.h
phy.h
pid.h
pipe_fs_i.h
pkt_cls.h
pkt_sched.h
pktcdvd.h
platform_device.h
pm_legacy.h
pm.h	[PATCH] kernel/power: move externs to header files	2006-03-23 07:38:07 -08:00
pmu.h
pnp.h
pnpbios.h
poll.h
posix_acl_xattr.h
posix_acl.h
posix_types.h
posix-timers.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	[PATCH] notifier: profile.h forward decl fix	2006-03-23 07:38:16 -08:00
ps2esdi.h
ptrace.h
qic117.h
qnx4_fs.h
qnxtypes.h
quota.h	[PATCH] Small cleanup in quota.h	2006-03-25 08:22:51 -08:00
quotaio_v1.h
quotaio_v2.h
quotaops.h
radeonfb.h
radix-tree.h
raid_class.h
ramfs.h
random.h
raw.h
rbtree.h
rcupdate.h	[PATCH] kernel/rcupdate.c: make two structs static	2006-03-23 07:38:17 -08:00
reboot_fixups.h
reboot.h
reiserfs_acl.h
reiserfs_fs_i.h
reiserfs_fs_sb.h
reiserfs_fs.h	[PATCH] reiserfs: fix transaction overflowing	2006-03-25 08:22:51 -08:00
reiserfs_xattr.h
relay.h	[PATCH] relay: migrate from relayfs to a generic relay API	2006-03-23 19:56:55 +01:00
relayfs_fs.h
resource.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.h	[PATCH] rtc.h broke strace(1) builds	2006-03-22 07:53:55 -08:00
rtnetlink.h	[IPV4]: Add fib rule netlink notifications	2006-03-23 01:16:06 -08:00
rwsem-spinlock.h
rwsem.h
sc26198.h
scatterlist.h
scc.h
sched.h	[PATCH] timer-irq-driven soft-watchdog, cleanups	2006-03-24 07:33:30 -08:00
screen_info.h
sctp.h
scx200_gpio.h
scx200.h
sdla_asy.h
sdla_chdlc.h
sdla_fr.h
sdla_ppp.h
sdla_x25.h
sdla.h
sdladrv.h
sdlapci.h
sdlasfm.h
seccomp.h
securebits.h
security.h
selection.h
selinux_netlink.h
sem.h
seq_file.h	[PATCH] sem2mutex: fs/seq_file.c	2006-03-23 07:38:12 -08:00
seqlock.h
serial167.h
serial_8250.h
serial_core.h	Merge master.kernel.org:/home/rmk/linux-2.6-serial	2006-03-22 17:33:12 -08:00
serial_ip3106.h
serial_reg.h
serial.h
serialP.h
serio.h
shm.h
shmem_fs.h
signal.h
skbuff.h
slab.h	[PATCH] slab: optimize constant-size kzalloc calls	2006-03-25 08:22:49 -08:00
smb_fs_i.h
smb_fs_sb.h
smb_fs.h
smb_mount.h
smb.h
smbno.h
smp_lock.h
smp.h	[PATCH] on_each_cpu(): disable local interrupts	2006-03-22 07:53:59 -08:00
snmp.h
socket.h
sockios.h
som.h
sonet.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
stallion.h
stat.h
statfs.h
stddef.h
stop_machine.h
string.h	[PATCH] strndup_user()	2006-03-24 07:33:31 -08:00
stringify.h
superhyway.h
suspend.h
swap.h	[PATCH] swsusp: low level interface	2006-03-23 07:38:07 -08:00
swapops.h
synclink.h
sys.h
syscalls.h	[PATCH] add sys_unshare to syscalls.h	2006-03-24 07:33:15 -08:00
sysctl.h
sysdev.h
sysfs.h
sysrq.h
sysv_fs.h
tcp.h
telephony.h
termios.h
textsearch_fsm.h
textsearch.h
tfrc.h
thread_info.h
threads.h
ticable.h
time.h	[PATCH] sys_alarm() unsigned signed conversion fixup	2006-03-25 08:22:48 -08:00
timer.h
times.h
timex.h
tiocl.h
tipc_config.h
tipc.h
topology.h
toshiba.h
transport_class.h
trdevice.h
tty_driver.h
tty_flip.h	[PATCH] constify tty flip buffer handling	2006-03-25 08:22:52 -08:00
tty_ldisc.h
tty.h	[PATCH] sem2mutex: tty	2006-03-23 07:38:11 -08:00
types.h
udf_fs_i.h
udf_fs_sb.h	[PATCH] sem2mutex: UDF	2006-03-23 07:38:14 -08:00
udf_fs.h
udp.h
ufs_fs_i.h
ufs_fs_sb.h
ufs_fs.h
uinput.h
uio.h
ultrasound.h
umem.h
un.h
unistd.h
usb_cdc.h
usb_ch9.h
usb_gadget.h
usb_gadgetfs.h
usb_input.h
usb_isp116x.h
usb_otg.h
usb_sl811.h
usb_usual.h
usb.h
usbdevice_fs.h
user.h
utime.h
uts.h
utsname.h
vermagic.h
vfs.h
via.h
video_decoder.h
video_encoder.h
videodev2.h
videodev.h
videotext.h
vmalloc.h
vt_buffer.h
vt_kern.h	[PATCH] swsusp: add check for suspension of X-controlled devices	2006-03-23 07:38:08 -08:00
vt.h
wait.h
wanpipe.h
wanrouter.h
watchdog.h
wavefront.h
wireless.h	[PATCH] WE-20 for kernel 2.6.16	2006-03-23 07:12:57 -05:00
workqueue.h
writeback.h	[PATCH] balance_dirty_pages_ratelimited: take nr_pages arg	2006-03-24 07:33:26 -08:00
x25.h	[X25]: allow ITU-T DTE facilities for x25	2006-03-22 00:01:31 -08:00
x1205.h
xattr.h
xfrm.h
yam.h
zconf.h
zftape.h
zlib.h
zorro_ids.h
zorro.h
zutil.h