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Tim Chen 423e0ab086 VFS : mount lock scalability for internal mounts 
For a number of file systems that don't have a mount point (e.g. sockfs
and pipefs), they are not marked as long term. Therefore in
mntput_no_expire, all locks in vfs_mount lock are taken instead of just
local cpu's lock to aggregate reference counts when we release
reference to file objects.  In fact, only local lock need to have been
taken to update ref counts as these file systems are in no danger of
going away until we are ready to unregister them.

The attached patch marks file systems using kern_mount without
mount point as long term.  The contentions of vfs_mount lock
is now eliminated.  Before un-registering such file system,
kern_unmount should be called to remove the long term flag and
make the mount point ready to be freed.

Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 		2011-07-24 10:08:32 -04:00
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accessibility
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acpi Merge branches 'd3cold', 'bugzilla-37412' and 'bugzilla-38152' into release 2011-07-14 00:16:38 -04:00
amba
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ata ahci: change 'masking port_map' printk to KERN_WARNING level 2011-06-29 10:10:07 -07:00
atm lanai: use pci_dev->subsystem_device 2011-07-12 07:59:38 -07:00
auxdisplay
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base Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2011-07-22 19:02:39 -07:00
bcma Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem 2011-07-15 10:05:24 -04:00
block Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2011-07-22 19:02:39 -07:00
bluetooth Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem 2011-07-15 10:05:24 -04:00
cdrom
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char Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2011-07-22 19:02:39 -07:00
clk
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clocksource i8253: Create common clockevent implementation 2011-07-01 10:37:14 +02:00
connector Merge branch 'ptrace' of git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc 2011-07-22 15:06:50 -07:00
cpufreq [CPUFREQ] fix cpumask memory leak in acpi-cpufreq on cpu hotplug. 2011-07-10 17:03:04 -04:00
cpuidle
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crypto crypto: caam - fix operator precedence in shared descriptor allocation 2011-06-30 07:43:27 +08:00
dca
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dio
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dma Merge branch 'spi/next' of git://git.secretlab.ca/git/linux-2.6 2011-07-22 14:52:44 -07:00
edac
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eisa
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firewire Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2011-07-22 14:49:48 -07:00
firmware Merge branch 'driver-core-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2011-06-28 11:15:36 -07:00
gpio Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6 2011-07-22 14:50:57 -07:00
gpu Merge branch 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6 2011-07-21 11:07:18 -07:00
hid Merge branches 'roccat', 'upstream' and 'wiimote' into for-linus 2011-07-22 22:47:08 +02:00
hwmon hwmon: (max1111) Fix race condition causing NULL pointer exception 2011-07-17 18:39:19 +02:00
hwspinlock
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i2c Merge branch 'for-30-rc5/all-i2c' of git://git.fluff.org/bjdooks/linux 2011-07-07 16:29:29 -07:00
ide
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idle
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ieee802154 IEEE 802.15.4: do not enable driver debugging by default 2011-06-30 16:18:09 +04:00
infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2011-07-22 14:50:12 -07:00
input Merge branch 'timers-cleanup-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-22 16:51:56 -07:00
iommu iommu/amd: Don't use MSI address range for DMA addresses 2011-07-06 17:14:44 +02:00
isdn net: Push protocol type directly down to header_ops->cache() 2011-07-13 02:29:59 -07:00
leds Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6 2011-07-22 14:50:57 -07:00
lguest lguest: Fix in/out emulation 2011-07-22 14:39:51 +09:30
macintosh drivers: fix up various ->llseek() implementations 2011-07-20 20:47:58 -04:00
mca
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md Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2011-07-22 19:02:39 -07:00
media Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2011-07-21 13:38:42 -07:00
memstick
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message
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mfd w1: ds1wm: add a reset recovery parameter 2011-07-08 21:14:44 -07:00
misc Merge branch 'driver-core-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 2011-06-28 11:15:36 -07:00
mmc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2011-07-22 14:43:13 -07:00
mtd VFS : mount lock scalability for internal mounts 2011-07-24 10:08:32 -04:00
net Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2011-07-22 14:50:12 -07:00
nfc NFC: pn533: add NXP pn533 nfc device driver 2011-07-05 15:26:58 -04:00
nubus
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of Merge branch 'of-pci' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2011-07-22 14:54:02 -07:00
oprofile perf: Remove the nmi parameter from the oprofile_perf backend 2011-07-21 20:41:58 +02:00
parisc
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parport
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pci Merge branch 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-22 16:39:42 -07:00
pcmcia pcmcia: pxa2xx/vpac270: free gpios on exist rather than requesting 2011-07-11 14:26:34 +08:00
platform hp-wmi: fix use after free 2011-07-11 09:52:35 -04:00
pnp
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power
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pps
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ps3
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ptp
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rapidio
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regulator regulator: max8997: Fix setting inappropriate value for ramp_delay variable 2011-07-08 19:14:58 +01:00
rtc Merge branch 'timers-rtc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-22 16:52:39 -07:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6 2011-07-22 16:01:57 -07:00
sbus
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scsi Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-22 16:44:08 -07:00
sfi
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sh switch assorted clock drivers to debugfs_remove_recursive() 2011-07-20 20:47:51 -04:00
sn
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spi Merge branch 'spi/next' of git://git.secretlab.ca/git/linux-2.6 2011-07-22 14:52:44 -07:00
ssb Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2011-07-14 07:56:40 -07:00
staging Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2011-07-22 19:02:39 -07:00
target target: remove custom hex2bin() implementation 2011-07-22 09:37:49 +00:00
tc
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telephony
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thermal
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tty Merge branch 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6 2011-07-22 14:53:38 -07:00
uio
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usb Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 2011-07-22 19:02:39 -07:00
uwb
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vhost vhost: handle wrap around in # of bufs math 2011-07-21 10:48:27 +03:00
video fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers 2011-07-20 20:47:59 -04:00
virtio
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vlynq
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w1 w1: ds1wm: add a reset recovery parameter 2011-07-08 21:14:44 -07:00
watchdog watchdog: hpwdt depends on PCI 2011-07-17 12:40:08 +00:00
xen Merge branch 'stable/drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2011-07-22 13:45:15 -07:00
zorro
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Kconfig Merge branch 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-22 16:39:42 -07:00
Makefile Merge branch 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-22 16:39:42 -07:00