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Rusty Russell 39214915f5 KVM: kvm_vm_ioctl_get_dirty_log restore "nothing dirty" optimization 
kvm_vm_ioctl_get_dirty_log scans bitmap to see it it's all zero, but
doesn't use that information.

Avi says:
	Looks like it was used to guard	kvm_mmu_slot_remove_write_access();
	optimizing the case where the guest just leaves the screen alone (which
	it usually does, especially in benchmarks).

	I'd rather reinstate that optimization.  See
	90cb0529dd where the damage was done.

It's pretty simple: if the bitmap is all zero, we don't need to do anything to
clean it.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Avi Kivity <avi@qumranet.com>
 		2007-10-13 10:18:21 +02:00
..
acorn/char Remove the arm26 port 2007-07-31 15:39:39 -07:00
acpi Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 2007-10-12 15:49:37 -07:00
amba Driver core: change add_uevent_var to use a struct 2007-10-12 14:51:01 -07:00
ata [libata] struct pci_dev related cleanups 2007-10-12 14:55:47 -04:00
atm [NET]: Make the device list and device lookups per namespace. 2007-10-10 16:49:10 -07:00
auxdisplay cfag12864b fix 2007-08-22 19:52:46 -07:00
base PM: merge device power-management source files 2007-10-12 14:51:12 -07:00
block [S390] Remove obsolete recommendation for 8M ramdisk size. 2007-10-12 16:13:09 +02:00
bluetooth [Bluetooth] Add missing stat.byte_rx counter modification 2007-09-09 08:39:27 +02:00
cdrom [POWERPC] iSeries: Move detection of virtual cdroms 2007-10-11 20:40:47 +10:00
char PTY: add kernel parameter to overwrite legacy pty count 2007-10-12 14:51:09 -07:00
clocksource
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connector [NET]: make netlink user -> kernel interface synchronious 2007-10-10 21:15:29 -07:00
cpufreq Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 2007-10-12 15:49:37 -07:00
crypto [CRYPTO] sha: Add header file for SHA definitions 2007-10-10 16:55:50 -07:00
dio
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dma [IOAT]: ioatdma needs to to play nice in a multi-dma-client world 2007-08-26 18:35:40 -07:00
edac Drivers: clean up direct setting of the name of a kset 2007-10-12 14:51:02 -07:00
eisa Driver core: change add_uevent_var to use a struct 2007-10-12 14:51:01 -07:00
fc4
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firewire Driver core: change add_uevent_var to use a struct 2007-10-12 14:51:01 -07:00
firmware Driver core: rename ktype_edd and ktype_efivar 2007-10-12 14:51:12 -07:00
hid Add some help texts to recently-introduced kconfig items 2007-08-18 09:52:50 -07:00
hwmon drivers/firmware: const-ify DMI API and internals 2007-10-09 20:22:20 -04:00
i2c Driver core: change add_uevent_var to use a struct 2007-10-12 14:51:01 -07:00
ide Driver core: change add_uevent_var to use a struct 2007-10-12 14:51:01 -07:00
ieee1394 Driver core: change add_uevent_var to use a struct 2007-10-12 14:51:01 -07:00
infiniband Driver core: change add_uevent_var to use a struct 2007-10-12 14:51:01 -07:00
input Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 2007-10-12 15:49:37 -07:00
isdn Merge branch 'isdn-cleanups' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/misc-2.6 2007-10-12 15:03:35 -07:00
kvm KVM: kvm_vm_ioctl_get_dirty_log restore "nothing dirty" optimization 2007-10-13 10:18:21 +02:00
leds leds: Update Cobalt Qube series front LED support 2007-10-11 22:24:00 +01:00
lguest fix modules oopsing in lguest guests 2007-09-25 08:51:04 -07:00
macintosh [POWERPC] adbhid: Enable KEY_FN key reporting 2007-09-22 14:49:21 +10:00
mca
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md kobjects: fix up improper use of the kobject name field 2007-10-12 14:51:02 -07:00
media cdev: remove unneeded setting of cdev names 2007-10-12 14:51:02 -07:00
message [NET]: Nuke SET_MODULE_OWNER macro. 2007-10-10 16:51:13 -07:00
mfd
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misc Driver core: change add_uevent_var to use a struct 2007-10-12 14:51:01 -07:00
mmc Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 2007-10-12 15:49:37 -07:00
mtd [POWERPC] Cleanups for physmap_of.c (v2) 2007-09-20 07:37:16 -05:00
net Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 2007-10-12 15:49:37 -07:00
nubus
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of
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oprofile
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parisc [NET]: Make the device list and device lookups per namespace. 2007-10-10 16:49:10 -07:00
parport parport_pc locking fix 2007-07-31 15:39:37 -07:00
pci Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6 2007-10-12 15:50:23 -07:00
pcmcia Driver core: change add_uevent_var to use a struct 2007-10-12 14:51:01 -07:00
pnp drivers/firmware: const-ify DMI API and internals 2007-10-09 20:22:20 -04:00
power Driver core: change add_uevent_var to use a struct 2007-10-12 14:51:01 -07:00
ps3
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rapidio
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rtc rtc: rtc-ds1553.c should use resource_size_t for base address 2007-09-19 11:24:17 -07:00
s390 Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 2007-10-12 15:49:37 -07:00
sbus Videopix Frame Grabber: Fix unreleased lock in vfc_debug() 2007-07-31 15:39:43 -07:00
scsi Merge branch 'upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev 2007-10-12 16:16:41 -07:00
serial Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2007-10-11 21:55:47 -07:00
sh
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sn
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spi Driver core: change add_uevent_var to use a struct 2007-10-12 14:51:01 -07:00
ssb [SSB]: Sparse fixes. 2007-10-10 16:52:21 -07:00
tc
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telephony
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uio
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usb Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 2007-10-12 15:49:37 -07:00
video Convert from class_device to device for drivers/video 2007-10-12 14:51:04 -07:00
w1 Driver core: change add_uevent_var to use a struct 2007-10-12 14:51:01 -07:00
xen xenbus_xs.c: fix a use-after-free 2007-07-26 11:35:17 -07:00
zorro zorro: Make sysfs config attribute read-only 2007-08-22 19:52:45 -07:00
Kconfig [SSB]: add Sonics Silicon Backplane bus support 2007-10-10 16:51:36 -07:00
Makefile [SSB]: add Sonics Silicon Backplane bus support 2007-10-10 16:51:36 -07:00