Takuya Yoshikawa 914ebccd2d KVM: x86: avoid unnecessary bitmap allocation when memslot is clean ... Although we always allocate a new dirty bitmap in x86's get_dirty_log(), it is only used as a zero-source of copy_to_user() and freed right after that when memslot is clean. This patch uses clear_user() instead of doing this unnecessary zero-source allocation. Performance improvement: as we can expect easily, the time needed to allocate a bitmap is completely reduced. In my test, the improved ioctl was about 4 to 10 times faster than the original one for clean slots. Furthermore, reducing memory allocations and copies will produce good effects to caches too. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>		2010-08-01 10:35:27 +03:00
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boot	x86, setup: Set ax register in boot vga query	2010-06-10 15:24:29 -07:00
configs
crypto
ia32
include/asm	x86: Add i8042 pre-detection hook to x86_platform_ops	2010-07-07 17:05:06 -07:00
kernel	x86,kgdb: Fix hw breakpoint regression	2010-07-28 19:10:30 -05:00
kvm	KVM: x86: avoid unnecessary bitmap allocation when memslot is clean	2010-08-01 10:35:27 +03:00
lguest
lib
math-emu
mm	rbtree: Undo augmented trees performance damage and regression	2010-07-05 14:43:50 +02:00
oprofile
pci	Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2010-07-19 13:19:32 -07:00
power	PM / x86: Save/restore MISC_ENABLE register	2010-06-08 00:32:49 +02:00
tools
vdso
video
xen	xen: ensure timer tick is resumed even on CPU driving the resume	2010-06-03 09:34:04 +01:00
.gitignore
Kbuild
Kconfig
Kconfig.cpu
Kconfig.debug
Makefile
Makefile_32.cpu