1
0
Fork 0
alistair23-linux/Documentation
Keqian Zhu c862626e19 KVM: arm64: Support enabling dirty log gradually in small chunks
There is already support of enabling dirty log gradually in small chunks
for x86 in commit 3c9bd4006b ("KVM: x86: enable dirty log gradually in
small chunks"). This adds support for arm64.

x86 still writes protect all huge pages when DIRTY_LOG_INITIALLY_ALL_SET
is enabled. However, for arm64, both huge pages and normal pages can be
write protected gradually by userspace.

Under the Huawei Kunpeng 920 2.6GHz platform, I did some tests on 128G
Linux VMs with different page size. The memory pressure is 127G in each
case. The time taken of memory_global_dirty_log_start in QEMU is listed
below:

Page Size      Before    After Optimization
  4K            650ms         1.8ms
  2M             4ms          1.8ms
  1G             2ms          1.8ms

Besides the time reduction, the biggest improvement is that we will minimize
the performance side effect (because of dissolving huge pages and marking
memslots dirty) on guest after enabling dirty log.

Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200413122023.52583-1-zhukeqian1@huawei.com
2020-05-16 15:05:02 +01:00
..
ABI change email address for Pali Rohár 2020-04-10 15:36:22 -07:00
PCI pci-v5.7-changes 2020-04-03 14:25:02 -07:00
RCU doc: Add rcutorture scripting to torture.txt 2020-02-27 07:03:14 -08:00
accounting doc: cgroup: improve formatting of references 2020-03-02 12:57:03 -07:00
admin-guide - Document DM integrity allow_discard feature that was added during 2020-04-30 16:45:08 -07:00
arm docs: arm: tcm: Fix a few typos 2020-02-19 02:42:21 -07:00
arm64 Documentation: arm64: fix amu.rst doc warnings 2020-04-23 17:05:22 +01:00
block block: Document genhd capability flags 2020-03-12 07:47:22 -06:00
bpf bpf: lsm: Add Documentation 2020-03-30 01:35:12 +02:00
cdrom docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
core-api docs: timekeeping: Use correct prototype for deprecated functions 2020-04-15 14:48:26 -06:00
cpu-freq docs: cpu-freq: convert cpufreq-stats.txt to ReST 2020-03-06 00:01:02 +01:00
crypto crypto: algapi - make unregistration functions return void 2019-12-20 14:58:35 +08:00
dev-tools linux-kselftest-kunit-5.7-rc1 2020-04-01 16:11:40 -07:00
devicetree dmaengine fixes for v5.7-rc4 2020-05-02 11:16:14 -07:00
doc-guide Documentation: build warnings related to missing blank lines after explicit markups has been fixed 2020-02-05 10:30:03 -07:00
driver-api A handful of late-arriving fixes for the documentation tree. 2020-04-10 17:53:43 -07:00
fault-injection docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
fb fbdev: fbmem: allow overriding the number of bootup logos 2020-01-03 14:27:40 +01:00
features documentation: vm: Advertise support for pte_special in riscv 2020-02-19 02:41:01 -07:00
filesystems debugfs: remove return value of debugfs_create_u32() 2020-04-17 17:08:50 +02:00
firmware-guide Documentation: firmware-guide: ACPI: fix table alignment in namespace.rst 2020-04-08 14:27:48 +02:00
firmware_class
fpga Documentation: fpga: dfl: add descriptions for thermal/power management interfaces 2019-10-16 19:18:26 -07:00
gpu UAPI Changes: 2020-03-19 10:40:27 +10:00
hid docs: add some documentation dirs to the driver-api book 2019-07-15 11:03:02 -03:00
hwmon hwmon: (pmbus/isl68137) Fix up chip IDs 2020-04-12 15:12:51 -07:00
i2c i2c: convert SMBus alert setup function to return an ERRPTR 2020-03-10 12:19:52 +01:00
ia64 docs: add SPDX tags to new index files 2019-07-15 11:03:03 -03:00
ide docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
iio docs: add some documentation dirs to the driver-api book 2019-07-15 11:03:02 -03:00
infiniband Documentation/infiniband: update name of some functions 2019-09-13 16:55:55 -03:00
input Input: docs: fix spelling mistake "potocol" -> "protocol" 2019-08-06 11:24:49 -06:00
isdn isdn: capi: dead code removal 2019-12-11 09:12:38 +01:00
kbuild Documentation: kbuild: fix the section title format 2020-04-23 10:53:19 +09:00
kernel-hacking docs: locking: Drop :c:func: throughout 2020-03-20 17:16:24 -06:00
leds leds: core: Add support for composing LED class device names 2019-07-25 20:07:52 +02:00
livepatch livepatch: Documentation of the new API for tracking system state changes 2019-11-01 13:08:24 +01:00
locking Documentation/locking/locktypes: Minor copy editor fixes 2020-03-28 12:47:34 +01:00
m68k docs: README.buddha: convert to ReST and add to m68k book 2019-07-31 13:30:10 -06:00
maintainer Add a maintainer entry profile for documentation 2020-01-24 09:48:39 -07:00
media media updates for v5.7-rc1 2020-03-30 13:42:05 -07:00
mhi docs: Add documentation for MHI bus 2020-03-19 07:41:04 +01:00
mips docs: mips: remove no longer needed au1xxx_ide.rst documentation 2020-03-24 15:53:48 +01:00
misc-devices Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2020-04-01 14:47:40 -07:00
netlabel docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
networking ice: cleanup language in ice.rst for fw.app 2020-05-01 15:30:24 -07:00
nios2 docs: nios2: add it to the main Documentation body 2019-07-31 13:31:51 -06:00
nvdimm docs: nvdimm: use ReST notation for subsection 2020-01-24 09:54:42 -07:00
openrisc openrisc: configs: Cleanup CONFIG_CROSS_COMPILE 2020-01-31 22:10:58 +09:00
parisc docs: parisc: convert to ReST and add to documentation body 2019-07-31 13:30:15 -06:00
pcmcia docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
power Merge branches 'pm-core', 'pm-sleep', 'pm-acpi' and 'pm-domains' 2020-03-30 14:46:58 +02:00
powerpc powerpc updates for 5.7 2020-04-05 11:12:59 -07:00
process Documentation/changes: Raise minimum supported binutils version to 2.23 2020-04-09 00:02:00 +09:00
riscv It has been a relatively quiet cycle for documentation, but there's still a 2020-01-29 15:27:31 -08:00
s390 Documentation/s390: remove outdated debugging390 documentation 2019-08-21 12:41:43 +02:00
scheduler Documentation/scheduler: fix links in sched-stats 2019-10-29 04:35:41 -06:00
scsi SCSI misc on 20200402 2020-04-02 17:03:53 -07:00
security docs: prevent warnings due to autosectionlabel 2020-03-20 17:01:29 -06:00
sh docs: remove extra conf.py files 2019-07-17 06:57:52 -03:00
sound ALSA: hda/realtek - Remove now-unnecessary XPS 13 headphone noise fixups 2020-03-31 10:54:06 +02:00
sparc docs: add arch doc directories to the index 2019-07-15 11:03:01 -03:00
sphinx docs: Fix empty parallelism argument 2020-02-25 03:11:04 -07:00
sphinx-static doc-rst: Reduce CSS padding around Field 2019-10-02 10:03:06 -06:00
spi spi: docs: convert to ReST and add it to the kABI bookset 2019-07-31 14:13:13 -06:00
target docs: prevent warnings due to autosectionlabel 2020-03-20 17:01:29 -06:00
timers docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
trace New tracing features: 2020-04-05 10:36:18 -07:00
translations media updates for v5.7-rc1 2020-03-30 13:42:05 -07:00
usb usb: gadget: add raw-gadget interface 2020-03-15 11:34:48 +02:00
userspace-api docs: userspace: ioctl-number: remove mc146818rtc conflict 2020-02-13 11:42:02 -07:00
virt KVM: arm64: Support enabling dirty log gradually in small chunks 2020-05-16 15:05:02 +01:00
vm mm/zswap: allow setting default status, compressor and allocator in Kconfig 2020-04-07 10:43:41 -07:00
w1 docs: w1: Fix a typo in omap-hdq.rst 2019-12-30 11:58:02 -07:00
watchdog linux-watchdog 5.4-rc1 tag 2019-09-27 11:17:38 -07:00
x86 Documentation/x86, efi/x86: Clarify EFI handover protocol and its requirements 2020-04-14 08:32:15 +02:00
xtensa docs: add arch doc directories to the index 2019-07-15 11:03:01 -03:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
COPYING-logo docs: logo.txt: rename it to COPYING-logo 2019-07-15 09:20:27 -03:00
Changes
CodingStyle
DMA-API-HOWTO.txt docs: DMA-API-HOWTO.txt: fix an unmarked code block 2019-07-15 09:20:24 -03:00
DMA-API.txt dma-mapping: remove dma_release_declared_memory 2019-09-04 11:13:19 +02:00
DMA-ISA-LPC.txt
DMA-attributes.txt dma-mapping: remove the DMA_ATTR_WRITE_BARRIER flag 2019-11-14 12:01:54 -04:00
IPMI.txt
IRQ-affinity.txt
IRQ-domain.txt
IRQ.txt
Kconfig docs: Kbuild/Makefile: allow check for missing docs at build time 2019-06-07 11:33:16 -06:00
Makefile Kbuild updates for v5.7 2020-03-31 16:03:39 -07:00
SubmittingPatches
asm-annotations.rst Documentation: Call out example SYM_FUNC_* usage as x86-specific 2020-01-16 12:53:16 -07:00
atomic_bitops.txt docs: atomic_bitops.txt: add a title for this document 2019-04-11 12:37:02 -06:00
atomic_t.txt Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-07-08 16:12:03 -07:00
bus-virt-phys-mapping.txt
conf.py docs: conf.py: avoid thousands of duplicate label warning on Sphinx 2020-03-20 17:01:34 -06:00
crc32.txt
debugging-via-ohci1394.txt
digsig.txt
docutils.conf doc-rst: Add missing newline at end of file 2019-06-20 14:16:56 -06:00
dontdiff modpost: dump missing namespaces into a single modules.nsdeps file 2019-11-11 20:10:01 +09:00
futex-requeue-pi.txt
hwspinlock.txt hwspinlock: add the 'in_atomic' API 2019-06-29 21:08:14 -07:00
index.rst Char/Misc driver patches for 5.7-rc1 2020-04-03 13:22:40 -07:00
irqflags-tracing.txt
kprobes.txt Merge branch 'parisc-5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux 2019-05-07 19:34:17 -07:00
kref.txt docs: kref: Clarify the use of two kref_put() in example code 2020-02-25 03:39:10 -07:00
logo.gif
lzo.txt lib/lzo: fix bugs for very short or empty input 2019-04-05 16:02:30 -10:00
mailbox.txt
memory-barriers.txt Documentation/memory-barriers: Fix typos 2020-02-27 07:03:14 -08:00
nommu-mmap.txt
percpu-rw-semaphore.txt
pi-futex.txt docs: locking: convert docs to ReST and rename to *.rst 2019-07-15 08:53:27 -03:00
preempt-locking.txt x86/fpu: Remove fpu__restore() 2019-04-09 19:27:42 +02:00
rbtree.txt docs: rbtree.txt: fix Sphinx build warnings 2019-07-15 09:20:24 -03:00
remoteproc.txt remoteproc: Add elf64 support in elf loader 2020-03-25 22:29:40 -07:00
robust-futex-ABI.txt threads: Update PID limit comment according to futex UAPI change 2020-03-21 17:48:13 +01:00
robust-futexes.txt futex: Update comments and docs about return values of arch futex code 2019-04-26 13:57:55 +01:00
rpmsg.txt
speculation.txt docs: speculation.txt: mark example blocks as such 2019-04-11 12:37:03 -06:00
static-keys.txt
tee.txt Documentation: tee: add AMD-TEE driver details 2020-01-04 13:49:51 +08:00
this_cpu_ops.txt
unaligned-memory-access.txt docs: unaligned-memory-access.txt: use a lowercase title 2019-04-11 12:37:03 -06:00
xz.txt