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Lai Jiangshan 2032a93d66 KVM: MMU: Don't allocate gfns page for direct mmu pages 
When sp->role.direct is set, sp->gfns does not contain any essential
information, leaf sptes reachable from this sp are for a continuous
guest physical memory range (a linear range).
So sp->gfns[i] (if it was set) equals to sp->gfn + i. (PT_PAGE_TABLE_LEVEL)
Obviously, it is not essential information, we can calculate it when need.

It means we don't need sp->gfns when sp->role.direct=1,
Thus we can save one page usage for every kvm_mmu_page.

Note:
  Access to sp->gfns must be wrapped by kvm_mmu_page_get_gfn()
  or kvm_mmu_page_set_gfn().
  It is only exposed in FNAME(sync_page).

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-08-01 10:35:52 +03:00
..
ABI
Revert "PCI: create function symlinks in /sys/bus/pci/slots/N/"
2010-06-11 13:08:37 -07:00
accounting
Documentation/: fix warnings from -Wmissing-prototypes in HOSTCFLAGS
2009-09-23 07:39:28 -07:00
acpi
ACPI, APEI, EINJ injection parameters support
2010-05-19 22:42:08 -04:00
aoe
…
arm
ARM: SAMSUNG: Documentation: add documentation on GPIO code
2010-05-28 19:31:31 +09:00
auxdisplay
includecheck fix: Documentation, cfag12864b-example.c
2009-09-24 07:20:57 -07:00
blackfin
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
block
Documentation: fix block/biodoc.txt dma mapping description
2010-03-08 09:11:07 +01:00
blockdev
The DRBD driver
2009-10-01 21:17:49 +02:00
cdrom
ide: doc: remove compilation options section from ide-cd documentation
2009-12-13 20:41:53 -08:00
cgroups
memcg: update documentation
2010-05-27 09:12:43 -07:00
connector
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
console
doc: fix console doc typo
2010-02-24 13:51:32 +01:00
cpu-freq
[CPUFREQ] Processor Clocking Control interface driver
2010-01-13 10:55:16 -05:00
cpuidle
…
cris
fix random typos
2008-10-16 11:21:30 -07:00
crypto
async_tx: add support for asynchronous RAID6 recovery operations
2009-08-29 19:09:27 -07:00
development-process
Documentation/development-process: add staging & mmotm info
2010-05-24 07:30:55 -07:00
device-mapper
dm: document when snapshot has finished merging
2010-03-06 02:29:56 +00:00
DocBook
Merge branch 'v4l_for_2.6.35' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6
2010-06-04 15:38:12 -07:00
driver-model
Fix spelling of 'platform' in comments and doc
2010-02-05 12:22:34 +01:00
dvb
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
early-userspace
…
fault-injection
lkdtm: add debugfs access and loosen KPROBE ties
2010-03-06 11:26:32 -08:00
fb
fbdev: rename imacfb.txt to efifb.txt and change imacfb to efifb.
2010-04-07 08:38:02 -07:00
filesystems
Merge branch 'master' into for-linus
2010-06-04 13:22:30 -05:00
firmware_class
driver core: fix documentation of request_firmware_nowait
2009-06-15 21:30:24 -07:00
frv
…
hwmon
hwmon: (ltc4245) Read only one GPIO pin
2010-05-27 19:59:02 +02:00
i2c
Documentation/i2c: Checkpatch cleanup
2010-06-03 11:33:50 +02:00
i2o
…
ia64
Documentation/: fix warnings from -Wmissing-prototypes in HOSTCFLAGS
2009-09-23 07:39:28 -07:00
ide
ide: preserve Host Protected Area by default (v2)
2009-06-07 13:52:52 +02:00
infiniband
IB: Fix typo in ipoib.txt
2009-12-09 14:21:36 -08:00
input
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2010-05-20 09:20:59 -07:00
ioctl
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
2010-03-19 09:43:06 -07:00
isdn
gigaset: small documentation improvement
2010-02-26 01:24:22 -08:00
ja_JP
block: rename CONFIG_LBD to CONFIG_LBDAF
2009-06-19 08:08:50 +02:00
kbuild
Merge branch 'for-35' of git://repo.or.cz/linux-kbuild
2010-06-01 08:55:52 -07:00
kdump
trivial: Miscellaneous documentation typo fixes
2009-06-12 18:01:47 +02:00
ko_KR
…
kvm
KVM: MMU: Don't allocate gfns page for direct mmu pages
2010-08-01 10:35:52 +03:00
laptops
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86
2010-05-21 17:13:24 -07:00
lguest
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
m68k
…
make
…
mips
ide: remove unused CONFIG_BLK_DEV_IDE_AU1XXX_SEQTS_PER_RQ
2009-01-14 19:19:03 +01:00
misc-devices
ad525x_dpot: new driver for AD525x digital potentiometers
2009-12-15 08:53:25 -08:00
mn10300
trivial: Miscellaneous documentation typo fixes
2009-06-12 18:01:47 +02:00
mtd
trivial: Miscellaneous documentation typo fixes
2009-06-12 18:01:47 +02:00
namespaces
…
netlabel
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
networking
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
2010-05-20 21:04:44 -07:00
parisc
…
PCI
Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
2010-05-21 18:58:52 -07:00
pcmcia
pcmcia: dev_node removal (core)
2010-05-10 10:23:17 +02:00
power
Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
2010-05-21 18:58:52 -07:00
powerpc
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
2010-05-21 11:17:05 -07:00
pps
LinuxPPS: core support
2009-06-18 13:04:04 -07:00
prctl
…
RCU
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2010-05-18 08:27:54 -07:00
s390
Merge branch 'for-next' into for-linus
2010-03-08 16:55:37 +01:00
scheduler
sched: Remove USER_SCHED from documentation
2010-04-02 20:12:01 +02:00
scsi
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
serial
ldisc: new dcd_change() method for line disciplines
2010-03-12 15:52:43 -08:00
sh
sh: Kill off remaining CONFIG_SH_KGDB bits.
2008-12-22 18:44:05 +09:00
sound
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
2010-05-20 09:41:44 -07:00
sparc
sparc: Remove Documentation/sparc/sbus_drivers.txt
2008-08-29 02:15:25 -07:00
spi
spi/ep93xx: implemented driver for Cirrus EP93xx SPI controller
2010-05-25 00:23:16 -06:00
sysctl
mm: compaction: add a tunable that decides when memory should be compacted and when it should be reclaimed
2010-05-25 08:06:59 -07:00
telephony
…
thermal
thermal: add sanity check for the passive attribute
2009-11-05 18:18:10 -05:00
timers
Documentation/timers/hpet_example.c: only build on X86
2010-06-01 10:05:19 -07:00
trace
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2010-05-20 09:20:59 -07:00
uml
…
usb
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
2010-05-20 21:26:12 -07:00
video4linux
V4L/DVB: Documentation: Add the Philips FQ1236 MK5 to video4linux/CARDLIST.tuner
2010-07-08 16:50:05 -03:00
vm
numa: update Documentation/vm/numa, add memoryless node info
2010-05-27 09:12:57 -07:00
w1
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
watchdog
watchdog: docs: add an entry for imx2_wdt
2010-07-01 16:02:55 +00:00
wimax
i2400m: documentation and instructions for usage
2009-01-07 10:00:18 -08:00
x86
x86, numa: Remove configurable node size support for numa emulation
2010-02-15 14:34:18 -08:00
zh_CN
…
.gitignore
add random binaries to .gitignore
2010-04-08 11:34:34 +02:00
00-INDEX
documentation: fix almost duplicate filenames (IO/io-mapping.txt)
2010-07-20 17:49:30 +00:00
applying-patches.txt
…
atomic_ops.txt
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
bad_memory.txt
Document handling of bad memory
2008-12-03 16:09:53 -07:00
basic_profiling.txt
…
binfmt_misc.txt
…
braille-console.txt
trivial: Miscellaneous documentation typo fixes
2009-06-12 18:01:47 +02:00
bt8xxgpio.txt
gpio: add bt8xxgpio driver
2008-07-25 10:53:30 -07:00
btmrvl.txt
Bluetooth: Add documentation for Marvell Bluetooth driver
2009-08-22 14:25:32 -07:00
BUG-HUNTING
…
bus-virt-phys-mapping.txt
documentation: fix almost duplicate filenames (IO/io-mapping.txt)
2010-07-20 17:49:30 +00:00
cachetlb.txt
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
Changes
netfilter: xtables: remove xt_string revision 0
2010-03-25 17:04:57 +01:00
circular-buffers.txt
Document Linux's circular buffering capabilities
2010-03-24 16:31:22 -07:00
CodingStyle
trivial: fix typo milisecond/millisecond for documentation and source comments.
2009-06-12 18:01:46 +02:00
cpu-hotplug.txt
cpumask: don't recommend set_cpus_allowed hack in Documentation/cpu-hotplug.txt
2009-12-17 11:43:29 +10:30
cpu-load.txt
…
cputopology.txt
Documentation: ABI: /sys/devices/system/cpu/cpu#/ topology files
2009-10-30 14:59:52 -07:00
credentials.txt
CRED: Holding a spinlock does not imply the holding of RCU read lock
2010-04-27 08:49:03 +10:00
dcdbas.txt
…
debugging-modules.txt
…
debugging-via-ohci1394.txt
ieee1394: update URLs in debugging-via-ohci1394.txt
2009-10-03 09:28:11 +02:00
dell_rbu.txt
trivial: Documentation/dell_rbu.txt: fix typos
2009-06-12 18:01:50 +02:00
devices.txt
driver core: add devname module aliases to allow module on-demand auto-loading
2010-05-25 15:08:26 -07:00
DMA-API-HOWTO.txt
Documentation/DMA-API-HOWTO: add ARCH_KMALLOC_MINALIGN description
2010-05-27 09:12:53 -07:00
DMA-API.txt
Documentation: rename PCI-DMA-mapping.txt to DMA-API-HOWTO.txt
2010-03-12 15:52:43 -08:00
DMA-attributes.txt
…
DMA-ISA-LPC.txt
…
dmaengine.txt
async_tx, dmaengine: document channel allocation and api rework
2009-01-05 18:10:19 -07:00
dontdiff
Merge branch 'for-linus-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-kconfig
2010-02-25 14:43:57 -08:00
dynamic-debug-howto.txt
Dynamic debug: allow simple quoting of words
2009-03-24 16:38:27 -07:00
edac.txt
Documentation/edac.txt: Reflect the sysfs changes at the document
2010-05-10 11:49:30 -03:00
eisa.txt
doc: fix Defaultd -> Defaults typo in EISA doc
2010-02-05 12:22:39 +01:00
email-clients.txt
Documentation/email-clients.txt: update gmail information
2010-03-12 15:52:35 -08:00
feature-removal-schedule.txt
ACPI / Sleep: Allow the NVS saving to be skipped during suspend to RAM
2010-07-24 23:26:09 -04:00
flexible-arrays.txt
Update flex_arrays.txt
2009-10-15 07:25:20 -06:00
futex-requeue-pi.txt
futex: add requeue-pi documentation
2009-05-09 07:12:50 +02:00
gcov.txt
trivial: fix typo in CONFIG_DEBUG_FS in gcov doc
2009-09-21 15:14:56 +02:00
gpio.txt
gpio: introduce gpio_request_one() and friends
2010-03-06 11:26:48 -08:00
highuid.txt
…
HOWTO
Documentation/HOWTO: update git home URL
2010-04-22 15:24:56 -07:00
hw_random.txt
…
init.txt
init/main.c: improve usability in case of init binary failure
2010-03-06 11:26:29 -08:00
initrd.txt
…
intel_txt.txt
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2010-05-20 09:20:59 -07:00
Intel-IOMMU.txt
intel-iommu: Kill DMAR_BROKEN_GFX_WA option.
2009-09-19 09:37:23 -07:00
io_ordering.txt
…
io-mapping.txt
io mapping: improve documentation
2008-11-03 18:21:44 +01:00
iostats.txt
Documentation cleanup: trivial misspelling, punctuation, and grammar corrections.
2008-07-26 12:00:06 -07:00
IPMI.txt
ipmi: add parameter to limit CPU usage in kipmid
2010-03-12 15:52:39 -08:00
IRQ-affinity.txt
…
IRQ.txt
…
irqflags-tracing.txt
…
isapnp.txt
…
java.txt
…
kernel-doc-nano-HOWTO.txt
documentation: update kernel-doc-nano-HOWTO information
2010-01-11 09:34:07 -08:00
kernel-docs.txt
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
kernel-parameters.txt
ACPI / Sleep: Allow the NVS saving to be skipped during suspend to RAM
2010-07-24 23:26:09 -04:00
keys-request-key.txt
…
keys.txt
KEYS: Add a keyctl to install a process's session keyring on its parent [try #6]
2009-09-02 21:29:22 +10:00
kmemcheck.txt
kmemcheck: update documentation
2009-07-01 22:36:22 +02:00
kmemleak.txt
kmemleak: add clear command support
2009-09-08 16:36:08 +01:00
kobject.txt
kobject: documentation: Update to refer to kset-example.c.
2010-03-19 07:12:20 -07:00
kprobes.txt
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2010-05-20 09:20:59 -07:00
kref.txt
kref: double kref_put() in my_data_handler()
2009-09-18 09:48:52 -07:00
ldm.txt
…
leds-class.txt
led: document sysfs interface
2009-08-28 15:21:12 -04:00
leds-lp3944.txt
leds: LED driver for National Semiconductor LP3944 Funlight Chip
2009-06-23 20:21:38 +01:00
local_ops.txt
trivial: Miscellaneous documentation typo fixes
2009-06-12 18:01:47 +02:00
lockdep-design.txt
lockdep: Fix typos in documentation
2009-08-07 12:03:46 +02:00
lockstat.txt
lockstat: Add usage info to Documentation/lockstat.txt
2009-12-06 13:20:02 +01:00
logo.gif
Revert "linux.conf.au 2009: Tuz"
2009-04-27 12:00:27 -07:00
logo.txt
Revert "linux.conf.au 2009: Tuz"
2009-04-27 12:00:27 -07:00
magic-number.txt
documentation: update header file paths
2009-01-06 15:59:28 -08:00
Makefile
Documentation/fs/: split txt and source files
2010-03-12 15:52:35 -08:00
ManagementStyle
docs: fix ManagementStyle book name
2008-10-30 11:38:46 -07:00
mca.txt
…
md.txt
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
memory-barriers.txt
Document Linux's circular buffering capabilities
2010-03-24 16:31:22 -07:00
memory-hotplug.txt
mm: add numa node symlink for memory section in sysfs
2009-12-15 08:53:17 -08:00
memory.txt
Documentation/memory.txt: remove some very outdated recommendations
2009-09-22 07:17:26 -07:00
mono.txt
…
mutex-design.txt
Rename .text.lock to .text..lock.
2010-03-03 11:26:00 +01:00
nmi_watchdog.txt
x86, nmi-watchdog: update procfs nmi_watchdog file documentation v2
2008-10-30 19:07:04 +01:00
nommu-mmap.txt
nommu: fix malloc performance by adding uninitialized flag
2009-12-15 08:53:24 -08:00
numastat.txt
mm: fix NUMA accounting in numastat.txt
2009-09-22 07:17:39 -07:00
oops-tracing.txt
panic: Add taint flag TAINT_FIRMWARE_WORKAROUND ('I')
2010-05-19 08:37:43 +01:00
padata.txt
Add a document describing the padata interface
2010-05-14 09:18:55 -06:00
parport-lowlevel.txt
…
parport.txt
…
pi-futex.txt
…
pnp.txt
doc: capitalization and other minor fixes in pnp doc
2010-02-05 12:22:44 +01:00
preempt-locking.txt
…
printk-formats.txt
DOC: add printk-formats.txt
2008-11-12 17:17:17 -08:00
prio_tree.txt
…
rbtree.txt
rbtree: Add support for augmented rbtrees
2010-02-18 15:40:56 -08:00
rfkill.txt
Document the rfkill sysfs ABI
2010-03-10 17:09:33 -05:00
robust-futex-ABI.txt
futex: documentation: fix inconsistent description of futex list_op_pending
2009-06-18 13:03:56 -07:00
robust-futexes.txt
…
rt-mutex-design.txt
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
rt-mutex.txt
…
rtc.txt
rtc: add boot_timesource sysfs attribute
2009-09-23 07:39:46 -07:00
SAK.txt
Remove Andrew Morton's old email accounts
2008-10-16 11:21:32 -07:00
SecurityBugs
…
SELinux.txt
selinux: add support for installing a dummy policy (v2)
2008-08-27 08:54:08 +10:00
serial-console.txt
…
sgi-ioc4.txt
…
sgi-visws.txt
…
slow-work.txt
SLOW_WORK: Move slow_work's proc file to debugfs
2009-12-01 08:20:31 -08:00
SM501.txt
trivial: Miscellaneous documentation typo fixes
2009-06-12 18:01:47 +02:00
Smack.txt
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
sparse.txt
doc: Change urls for sparse
2010-04-27 22:59:07 +02:00
spinlocks.txt
Documentation: rw_lock lessons learned
2009-12-14 09:46:56 -08:00
stable_api_nonsense.txt
…
stable_kernel_rules.txt
Documentation: -stable rules: upstream commit ID requirement reworded
2010-04-22 15:24:56 -07:00
SubmitChecklist
Documentation: update SubmitChecklist for O=objdir and kconfig testing
2010-05-24 07:31:20 -07:00
SubmittingDrivers
Documentation: SubmittingDrivers: Resources
2010-05-27 09:12:43 -07:00
SubmittingPatches
docs: update patch size in SubmittingPatches
2009-10-01 16:11:12 -07:00
svga.txt
…
sysfs-rules.txt
Fix typos in comments
2010-03-16 11:47:56 +01:00
sysrq.txt
Input: Documentation/sysrq.txt - update KEY_SYSRQ info
2010-05-19 10:14:15 -07:00
tomoyo.txt
tomoyo: add Documentation/tomoyo.txt
2009-04-14 09:14:58 +10:00
unaligned-memory-access.txt
introduce HAVE_EFFICIENT_UNALIGNED_ACCESS Kconfig symbol
2008-07-25 10:53:27 -07:00
unicode.txt
…
unshare.txt
…
VGA-softcursor.txt
…
vgaarbiter.txt
vgaarbiter: fix a typo in the vgaarbiter Documentation
2009-12-16 11:28:58 -08:00
video-output.txt
…
volatile-considered-harmful.txt
Documentation/volatile-considered-harmful.txt: correct cpu_relax() documentation
2010-03-24 16:31:20 -07:00
zorro.txt
…