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i2som-imx-linux/drivers/acpi
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Joerg Roedel 763802b53a x86/mm: split vmalloc_sync_all() 
Commit 3f8fd02b1b ("mm/vmalloc: Sync unmappings in
__purge_vmap_area_lazy()") introduced a call to vmalloc_sync_all() in
the vunmap() code-path.  While this change was necessary to maintain
correctness on x86-32-pae kernels, it also adds additional cycles for
architectures that don't need it.

Specifically on x86-64 with CONFIG_VMAP_STACK=y some people reported
severe performance regressions in micro-benchmarks because it now also
calls the x86-64 implementation of vmalloc_sync_all() on vunmap().  But
the vmalloc_sync_all() implementation on x86-64 is only needed for newly
created mappings.

To avoid the unnecessary work on x86-64 and to gain the performance
back, split up vmalloc_sync_all() into two functions:

	* vmalloc_sync_mappings(), and
	* vmalloc_sync_unmappings()

Most call-sites to vmalloc_sync_all() only care about new mappings being
synchronized.  The only exception is the new call-site added in the
above mentioned commit.

Shile Zhang directed us to a report of an 80% regression in reaim
throughput.

Fixes: 3f8fd02b1b ("mm/vmalloc: Sync unmappings in __purge_vmap_area_lazy()")
Reported-by: kernel test robot <oliver.sang@intel.com>
Reported-by: Shile Zhang <shile.zhang@linux.alibaba.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Borislav Petkov <bp@suse.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>	[GHES]
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20191009124418.8286-1-joro@8bytes.org
Link: https://lists.01.org/hyperkitty/list/lkp@lists.01.org/thread/4D3JPPHBNOSPFK2KEPC6KGKS6J25AIDB/
Link: http://lkml.kernel.org/r/20191113095530.228959-1-shile.zhang@linux.alibaba.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-03-21 18:56:06 -07:00
..
acpica
ACPI: PM: s2idle: Check fixed wakeup events in acpi_s2idle_wake()
2020-02-21 10:01:25 -08:00
apei
x86/mm: split vmalloc_sync_all()
2020-03-21 18:56:06 -07:00
arm64
Merge tag 'iommu-updates-v5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
2020-02-05 17:49:54 +00:00
dptf
ACPI: DPTF: Add Tiger Lake ACPI device IDs
2019-12-19 22:51:55 +01:00
nfit
libnvdimm: Move nvdimm_bus_attribute_group to device_type
2019-11-19 09:52:12 -08:00
numa
ACPI: HMAT: use %u instead of %d to print u32 values
2019-11-12 10:05:57 +01:00
pmic
ACPI / PMIC: Add Cherry Trail Crystal Cove PMIC OpRegion driver
2019-10-25 11:43:08 +02:00
x86
…
ac.c
…
acpi_adxl.c
…
acpi_amba.c
…
acpi_apd.c
ACPI / APD: Add clock frequency for Hisilicon Hip08-Lite I2C controller
2020-02-03 12:03:18 +01:00
acpi_cmos_rtc.c
…
acpi_configfs.c
ACPICA: make acpi_load_table() return table index
2019-10-28 22:12:46 +01:00
acpi_dbg.c
…
acpi_extlog.c
…
acpi_ipmi.c
…
acpi_lpat.c
…
acpi_lpit.c
remove ioremap_nocache and devm_ioremap_nocache
2020-01-06 09:45:59 +01:00
acpi_lpss.c
ACPI / LPSS: Rename pwm_backlight pwm-lookup to pwm_soc_backlight
2019-12-17 11:24:47 +01:00
acpi_memhotplug.c
…
acpi_pad.c
…
acpi_platform.c
ACPI: platform: Unregister stale platform devices
2019-10-17 23:48:39 +02:00
acpi_pnp.c
…
acpi_processor.c
ACPI: processor: Export acpi_processor_evaluate_cst()
2019-12-27 11:02:07 +01:00
acpi_tad.c
…
acpi_video.c
ACPI: video: fix typo in comment
2019-12-16 11:19:58 +01:00
acpi_watchdog.c
ACPI: watchdog: Fix gas->access_width usage
2020-02-13 23:51:30 +01:00
battery.c
proc: convert everything to "struct proc_ops"
2020-02-04 03:05:26 +00:00
bgrt.c
…
blacklist.c
…
bus.c
ACPI: bus: Fix NULL pointer check in acpi_bus_get_private_data()
2019-11-29 11:42:10 +01:00
button.c
ACPI: button: Add DMI quirk for Razer Blade Stealth 13 late 2019 lid switch
2020-01-07 11:51:41 +01:00
cm_sbs.c
…
container.c
…
cppc_acpi.c
ACPI: CPPC: Set pcc_data[pcc_ss_id] to NULL in acpi_cppc_processor_exit()
2019-10-18 10:36:37 +02:00
custom_method.c
Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2019-09-28 08:14:15 -07:00
debugfs.c
…
device_pm.c
ACPI: fan: Add Tiger Lake ACPI device ID
2019-12-19 22:51:55 +01:00
device_sysfs.c
…
dock.c
…
ec_sys.c
…
ec.c
ACPI: EC: Fix flushing of pending work
2020-02-11 10:07:43 +01:00
event.c
…
evged.c
…
fan.c
Merge branches 'acpi-battery', 'acpi-video', 'acpi-fan' and 'acpi-drivers'
2020-01-27 10:57:09 +01:00
glue.c
…
hed.c
…
internal.h
ACPI: EC: add support for hardware-reduced systems
2019-10-28 16:00:09 +01:00
ioapic.c
…
irq.c
…
Kconfig
ACPI: processor: Make ACPI_PROCESSOR_CSTATE depend on ACPI_PROCESSOR
2019-12-27 11:01:45 +01:00
Makefile
Merge branch 'acpi-mm'
2019-11-26 10:31:02 +01:00
nvs.c
…
osi.c
ACPI: OSI: Shoot duplicate word
2019-11-13 11:12:08 +01:00
osl.c
ACPI: OSL: only free map once in osl.c
2019-11-29 10:31:12 +01:00
pci_irq.c
…
pci_link.c
…
pci_mcfg.c
…
pci_root.c
…
pci_slot.c
…
power.c
…
pptt.c
ACPI: PPTT: Consistently use unsigned int as parameter type
2020-01-07 11:46:36 +01:00
proc.c
proc: convert everything to "struct proc_ops"
2020-02-04 03:05:26 +00:00
processor_core.c
…
processor_driver.c
cpufreq: Use per-policy frequency QoS
2019-10-21 02:05:21 +02:00
processor_idle.c
ACPI: processor: Export acpi_processor_evaluate_cst()
2019-12-27 11:02:07 +01:00
processor_pdc.c
…
processor_perflib.c
ACPI: processor: Add QoS requests for all CPUs
2019-10-25 11:33:48 +02:00
processor_thermal.c
ACPI: processor: Add QoS requests for all CPUs
2019-10-25 11:33:48 +02:00
processor_throttling.c
…
property.c
device property: Add a function to obtain a node's prefix
2019-10-11 11:26:55 +02:00
reboot.c
…
resource.c
acpi: Use pr_warn instead of pr_warning
2019-10-18 15:00:19 +02:00
sbs.c
…
sbshc.c
…
sbshc.h
…
scan.c
treewide: remove redundant IS_ERR() before error code check
2020-02-04 03:05:27 +00:00
sleep.c
ACPI: PM: s2idle: Check fixed wakeup events in acpi_s2idle_wake()
2020-02-21 10:01:25 -08:00
sleep.h
…
spcr.c
…
sysfs.c
ACPI: sysfs: Change ACPI_MASKABLE_GPE_MAX to 0x100
2019-11-19 09:40:16 +01:00
tables.c
Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2019-09-28 08:14:15 -07:00
thermal.c
ACPI: thermal: switch to use <linux/units.h> helpers
2020-01-31 10:30:39 -08:00
utils.c
ACPI / utils: Introduce acpi_dev_hid_uid_match() helper
2019-10-15 12:06:23 +02:00
video_detect.c
ACPI: video: Do not export a non working backlight interface on MSI MS-7721 boards
2019-12-19 23:01:52 +01:00
wakeup.c
…