Michal Hocko
c76adee347
mm, thp, proc: report THP eligibility for each vma ...
[ Upstream commit 7635d9cbe8327e131a1d3d8517dc186c2796ce2e ]
Userspace falls short when trying to find out whether a specific memory
range is eligible for THP. There are usecases that would like to know
that
http://lkml.kernel.org/r/alpine.DEB.2.21.1809251248450.50347@chino.kir.corp.google.com
: This is used to identify heap mappings that should be able to fault thp
: but do not, and they normally point to a low-on-memory or fragmentation
: issue.
The only way to deduce this now is to query for hg resp. nh flags and
confronting the state with the global setting. Except that there is also
PR_SET_THP_DISABLE that might change the picture. So the final logic is
not trivial. Moreover the eligibility of the vma depends on the type of
VMA as well. In the past we have supported only anononymous memory VMAs
but things have changed and shmem based vmas are supported as well these
days and the query logic gets even more complicated because the
eligibility depends on the mount option and another global configuration
knob.
Simplify the current state and report the THP eligibility in
/proc/<pid>/smaps for each existing vma. Reuse
transparent_hugepage_enabled for this purpose. The original
implementation of this function assumes that the caller knows that the vma
itself is supported for THP so make the core checks into
__transparent_hugepage_enabled and use it for existing callers.
__show_smap just use the new transparent_hugepage_enabled which also
checks the vma support status (please note that this one has to be out of
line due to include dependency issues).
[mhocko@kernel.org: fix oops with NULL ->f_mapping]
Link: http://lkml.kernel.org/r/20181224185106.GC16738@dhcp22.suse.cz
Link: http://lkml.kernel.org/r/20181211143641.3503-3-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Paul Oppenheimer <bepvte@gmail.com>
Cc: William Kucharski <william.kucharski@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-17 20:35:45 +01:00
x86/bugs: Add ITLB_MULTIHIT bug infrastructure
2019-11-12 19:21:36 +01:00
ocxl: Document new OCXL IOCTLs
2018-06-03 20:40:33 +10:00
ACPI: property: graph: Update graph documentation to use generic references
2018-07-23 12:44:52 +02:00
USB: documentation: flags on usb-storage versus UAS
2019-12-17 20:34:30 +01:00
ARM: 8833/1: Ensure that NEON code always compiles with Clang
2019-04-05 22:33:08 +02:00
arm64: docs: Document SSBS HWCAP
2019-10-11 18:21:31 +02:00
Doc: misc-devices: move lcd-panel-cgram.txt to auxdisplay/
2018-04-12 16:08:02 +02:00
block: Track DISCARD statistics and output them in stat and diskstat
2018-07-18 08:44:22 -06:00
zram: introduce zram memory tracking
2018-06-07 17:34:34 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2018-08-07 11:02:05 -07:00
Documentation/cdrom: fix German sharp s in LaTex
2018-03-08 19:35:29 -07:00
page cache: use xa_lock
2018-04-11 10:28:39 -07:00
Documentation: corrections to console/console.txt
2018-08-10 16:09:40 -06:00
idr: Change documentation license
2018-10-15 16:31:29 -04:00
cpufreq: Drop cpufreq_table_validate_and_show()
2018-04-10 08:40:45 +02:00
cpuidle: Add definition of residency to sysfs documentation
2018-04-09 13:44:37 +02:00
crypto: remove redundant type flags from tfm allocation
2018-07-09 00:30:29 +08:00
doc: dev-tools: kselftest.rst: update contributing new tests
2018-06-29 09:01:50 -06:00
dm raid: bump target version, update comments and documentation
2018-09-06 17:07:58 -04:00
rtc: dt-binding: abx80x: fix resistance scale
2019-12-13 08:51:36 +01:00
Documentation/sphinx: allow "functions" with no parameters
2018-06-30 07:52:42 -06:00
USB: core: Fix bug caused by duplicate interface PM usage counter
2019-05-08 07:21:44 +02:00
dmaengine: add a new helper dmaenginem_async_device_register
2018-07-30 10:50:22 +05:30
initramfs: move gen_initramfs_list.sh from scripts/ to usr/
2018-08-22 23:21:44 +09:00
Documentation: nvme: Documentation for nvme fault injection
2018-03-26 08:53:43 -06:00
uvesafb: Fix URLs in the documentation
2018-09-26 18:11:23 +02:00
ARM: 8777/1: Hook up SYNC_CORE functionality for sys_membarrier()
2018-07-11 11:02:08 +01:00
mm, thp, proc: report THP eligibility for each vma
2019-12-17 20:35:45 +01:00
docs: fpga: add a document for FPGA Device Feature List (DFL) Framework Overview
2018-07-15 13:55:44 +02:00
Documentation: gpio: Move drivers-on-gpio.txt to driver-api
2018-03-23 04:22:29 +01:00
drm/msm/gpu: Add the buffer objects from the submit to the crash dump
2018-07-30 08:50:10 -04:00
HID: doc: fix wrong data structure reference for UHID_OUTPUT
2019-12-05 09:20:36 +01:00
hwmon: (ina2xx) fix sysfs shunt resistor read access
2018-08-26 17:45:25 -07:00
i2c: i801: Add support for Intel Comet Lake
2019-05-04 09:20:15 +02:00
ia64: doc: tweak whitespace for 'console=' parameter
2018-03-05 14:41:38 -08:00
iio: adc: New driver for Cirrus Logic EP93xx ADC
2017-07-25 19:56:23 +01:00
Documentation/ABI: update infiniband sysfs interfaces
2018-02-23 08:18:33 -07:00
input: add MT_TOOL_DIAL
2018-07-17 15:33:47 +02:00
Char/Misc driver patches for 4.19-rc1
2018-08-18 11:04:51 -07:00
Documentation/isdn: check and fix dead links ...
2018-03-26 12:31:13 -04:00
kbuild: Fix LOADLIBES rename in Documentation/kbuild/makefiles.txt
2018-08-22 23:21:42 +09:00
kexec/kdump: minor Documentation updates for arm64 and Image
2017-07-12 16:26:00 -07:00
doc:it_IT: translation for kernel-hacking
2018-07-26 16:21:09 -06:00
platform/x86: thinkpad_acpi: silence HKEY 0x6032, 0x60f0, 0x6030
2018-05-07 15:10:31 +03:00
Documentation: leds: Update 00-INDEX file
2017-10-23 20:17:03 +02:00
livepatch: Remove not longer valid limitations from the documentation
2018-05-24 15:37:57 +02:00
locking: Implement an algorithm choice for Wound-Wait mutexes
2018-07-03 09:44:36 +02:00
docs: Fix more broken references
2018-06-15 18:11:26 -03:00
raid5-ppl: PPL support for disks with write-back cache enabled
2018-01-15 14:29:42 -08:00
media: replace ADOBERGB by OPRGB
2018-11-13 11:08:54 -08:00
Documentation: mips: Update AU1xxx_IDE Kconfig dependencies
2018-02-01 12:45:35 -07:00
pci_endpoint_test: Add 2 ioctl commands
2018-07-19 11:46:57 +01:00
mtd: spi-nor: add an API to restore the status of SPI flash chip
2017-12-13 00:36:00 +01:00
tcp: add tcp_min_snd_mss sysctl
2019-06-17 19:51:56 +02:00
NVMEM documentation fix: A minor typo
2017-08-24 13:31:58 -06:00
Documentation: openrisc: Updates to README
2017-10-30 21:37:53 +09:00
Merge branch 'remotes/lorenzo/pci/dwc'
2018-08-15 14:59:11 -05:00
pcmcia: remove long deprecated pcmcia_request_exclusive_irq() function
2018-08-18 12:30:42 -07:00
drivers/bus: Move Arm CCN PMU driver
2018-03-06 17:26:15 +01:00
PM / reboot: Eliminate race between reboot and suspend
2018-08-06 12:35:20 +02:00
powerpc: Document issues with TM on POWER9
2018-07-02 23:54:29 +10:00
drivers/pps: aesthetic tweaks to PPS-related content
2017-09-08 18:26:51 -07:00
stable-kernel-rules.rst: add link to networking patch queue
2019-03-23 20:10:10 +01:00
ptp: Fix documentation to match code.
2018-03-26 12:13:21 -04:00
Documentation: rapidio: move sysfs interface to ABI
2018-02-23 08:25:45 -07:00
rculist: Improve documentation for list_for_each_entry_from_rcu()
2018-07-12 15:39:25 -07:00
perf: riscv: Add Document for Future Porting Guide
2018-06-04 14:02:11 -07:00
vfio-ccw: update documentation
2018-03-01 17:32:14 +01:00
sched/fair: Fix low cpu usage with high throttling by removing expiration of cpu-local slices
2019-11-12 19:20:50 +01:00
scsi: documentation: add scsi_mod.use_blk_mq to scsi-parameters
2018-08-27 12:26:10 -04:00
Kbuild: rename CC_STACKPROTECTOR[_STRONG] config variables
2018-06-14 12:21:18 +09:00
ASoC: Updates for v4.19
2018-08-13 12:12:31 +02:00
sparc64: Add support for ADI (Application Data Integrity)
2018-03-18 07:38:48 -07:00
doc: Cope with Sphinx logging deprecations
2019-06-09 09:17:21 +02:00
docs RTD theme: code-block with line nos - lines and line numbers don't line up.
2017-07-17 13:48:45 -06:00
bpf: add bpf_jit_limit knob to restrict unpriv allocations
2019-05-31 06:46:03 -07:00
thermal: Add cooling device's statistics in sysfs
2018-04-02 21:49:01 +08:00
timekeeping.txt: Correct maxCount of n-bit binary counter
2018-07-23 09:33:06 -06:00
This was a moderately busy cycle for docs, with the usual collection of
2018-08-14 14:29:31 -07:00
This was a moderately busy cycle for docs, with the usual collection of
2018-08-14 14:29:31 -07:00
USB: rio500: Remove Rio 500 kernel driver
2019-10-17 13:44:47 -07:00
Documentation: Add section about CPU vulnerabilities for Spectre
2019-07-14 08:11:17 +02:00
kvm: Convert kvm_lock to a mutex
2019-11-12 19:21:40 +01:00
docs/vm: move ksm and transhuge from "user" to "internals" section.
2018-05-29 06:45:55 -06:00
w1: fix w1_ds2438 documentation
2018-07-07 17:27:13 +02:00
watchdog: remove bfin_wdt driver
2018-03-26 15:57:04 +02:00
x86/speculation/taa: Add documentation for TSX Async Abort
2019-11-12 19:21:34 +01:00
xtensa: add support for KASAN
2017-12-16 22:37:12 -08:00
docs: admin-guide: add cgroup-v2 documentation
2018-05-10 15:42:41 -06:00
locking/atomic/bitops: Document and clarify ordering semantics for failed test_and_{}_bit()
2018-02-13 14:55:53 +01:00
x86/atomic: Fix smp_mb__{before,after}_atomic()
2019-07-26 09:14:08 +02:00
bt8xxgpio.txt: standardize document format
2017-07-14 13:51:27 -06:00
btmrvl.txt: standardize document format
2017-07-14 13:51:27 -06:00
bus-virt-phys-mapping.txt: standardize document format
2017-07-14 13:51:28 -06:00
kernel debug: support resetting WARN*_ONCE
2017-11-17 16:10:00 -08:00
docs: Fix conf.py for Sphinx 2.0
2019-06-09 09:17:20 +02:00
cpu-load: standardize document format
2017-07-14 13:51:30 -06:00
cputopology.txt: standardize document format
2017-07-14 13:51:30 -06:00
crc32.txt: standardize document format
2017-07-14 13:51:30 -06:00
dcdbas.txt: standardize document format
2017-07-14 13:51:31 -06:00
debugging-via-ohci1394.txt: standardize document format
2017-07-14 13:51:34 -06:00
Documentation: remove stale firmware API reference
2018-05-14 16:44:41 +02:00
digsig.txt: standardize document format
2017-07-14 13:51:31 -06:00
DMA-API-HOWTO.txt: standardize document format
2017-07-14 13:51:32 -06:00
dma-coherent: remove the DMA_MEMORY_MAP and DMA_MEMORY_IO flags
2017-09-01 11:59:17 +02:00
DMA-attributes.txt: standardize document format
2017-07-14 13:51:33 -06:00
DMA-ISA-LPC.txt: standardize document format
2017-07-14 13:51:33 -06:00
Remove gperf usage from toolchain
2017-08-19 11:02:53 -07:00
efi-stub.txt: standardize document format
2017-07-14 13:51:34 -06:00
eisa.txt: standardize document format
2017-07-14 13:51:34 -06:00
flexible-arrays.txt: standardize document format
2017-07-14 13:51:35 -06:00
futex-requeue-pi.txt: standardize document format
2017-07-14 13:51:35 -06:00
gcc-plugins.txt: standardize document format
2017-07-14 13:51:36 -06:00
highuid.txt: standardize document format
2017-07-14 13:51:36 -06:00
hw_random.txt: standardize document format
2017-07-14 13:51:37 -06:00
hwspinlock.txt: standardize document format
2017-07-14 13:51:37 -06:00
x86/speculation/mds: Add mds_clear_cpu_buffers()
2019-05-14 19:17:54 +02:00
Intel-IOMMU.txt: standardize document format
2017-07-14 13:51:38 -06:00
intel_txt.txt: standardize document format
2017-07-14 13:51:38 -06:00
io-mapping.txt: standardize document format
2017-07-14 13:51:38 -06:00
io_ordering.txt: standardize document format
2017-07-14 13:51:39 -06:00
block: Track DISCARD statistics and output them in stat and diskstat
2018-07-18 08:44:22 -06:00
ipmi: Make IPMI panic strings always available
2017-09-27 16:03:45 -05:00
IRQ-affinity.txt: standardize document format
2017-07-14 13:51:41 -06:00
irqdomain: Kill CONFIG_IRQ_DOMAIN_DEBUG
2018-01-24 12:32:58 +01:00
IRQ.txt: add a markup for its title
2017-07-14 13:51:42 -06:00
irqflags-tracing.txt: standardize document format
2017-07-14 13:51:42 -06:00
isa.txt: standardize document format
2017-07-14 13:51:43 -06:00
isapnp.txt: promote title level
2017-07-14 13:51:43 -06:00
kernel-per-CPU-kthreads.txt: standardize document format
2017-07-14 13:51:43 -06:00
kobject.txt: standardize document format
2017-07-14 13:51:44 -06:00
kprobes/Documentation: Fix various typos
2018-06-22 11:10:55 +02:00
kref.txt: standardize document format
2017-07-14 13:51:45 -06:00
ldm.txt: standardize document format
2017-07-14 13:51:45 -06:00
lockup-watchdogs.txt: standardize document format
2017-07-14 13:51:46 -06:00
lzo.txt: standardize document format
2017-07-14 13:51:46 -06:00
mailbox.txt: standardize document format
2017-07-14 13:51:47 -06:00
Documentation: add script and build target to check for broken file references
2017-10-12 11:07:42 -06:00
sched/Documentation: Update wake_up() & co. memory-barrier guarantees
2018-07-17 09:30:34 +02:00
memory-hotplug.txt: standardize document format
2017-07-14 13:57:53 -06:00
men-chameleon-bus.txt: standardize document format
2017-07-14 13:57:54 -06:00
Documentation: nommu-map: Fix duplicate word typo
2018-06-26 09:01:27 -06:00
This series converts a number of top-level documents to the RST format
2017-07-15 12:58:58 -07:00
numastat.txt: standardize document format
2017-07-14 13:57:56 -06:00
padata.txt: standardize document format
2017-07-14 13:57:56 -06:00
parport-lowlevel.txt: standardize document format
2017-07-14 13:57:57 -06:00
percpu-rw-semaphore.txt: standardize document format
2017-07-14 13:57:58 -06:00
phy.txt: standardize document format
2017-07-14 13:57:58 -06:00
Documentation: fix locking rt-mutex doc refs
2017-10-19 12:56:44 -06:00
pnp.txt: standardize document format
2017-07-14 13:57:59 -06:00
preempt-locking.txt: standardize document format
2017-07-14 13:58:00 -06:00
pwm: Standardize document format
2017-07-06 08:23:30 +02:00
rbtree: cache leftmost node internally
2017-09-08 18:26:48 -07:00
remoteproc.txt: standardize document format
2017-07-14 13:58:02 -06:00
rfkill: Fix several typos in documentation
2018-06-15 13:36:08 +02:00
robust-futex-ABI.txt: standardize document format
2017-07-14 13:58:03 -06:00
futex: Update comments and docs about return values of arch futex code
2019-07-03 13:14:49 +02:00
rpmsg.txt: standardize document format
2017-07-14 13:58:04 -06:00
Documentation: rtc: move iotcl interface documentation to ABI
2018-01-12 00:20:41 +01:00
SAK.txt: standardize document format
2017-07-14 13:58:04 -06:00
sgi-ioc4.txt: standardize document format
2017-07-14 13:58:05 -06:00
siphash.txt: standardize document format
2017-07-14 13:58:06 -06:00
SM501.txt: standardize document format
2017-07-14 13:58:06 -06:00
smsc_ece1099.txt: standardize document format
2017-07-14 13:58:07 -06:00
Documentation: Document array_index_nospec
2018-01-30 21:54:28 +01:00
jump_label: Provide hotplug context variants
2017-08-10 12:28:59 +02:00
documentation/svga.txt: update outdated file
2017-11-20 10:45:50 -07:00
NTB: switchtec_ntb: Update switchtec documentation with notes for NTB
2017-11-18 20:37:13 -05:00
tee.txt: standardize document format
2017-07-14 13:58:14 -06:00
this_cpu_ops.txt: standardize document format
2017-07-14 13:58:08 -06:00
unaligned-memory-access.txt: standardize document format
2017-07-14 13:58:09 -06:00
vfio/mdev: Check globally for duplicate devices
2018-06-08 10:24:27 -06:00
vfio: fix documentation
2018-05-08 09:16:41 -06:00
xillybus.txt: standardize document format
2017-07-14 13:58:11 -06:00
xz.txt: standardize document format
2017-07-14 13:58:11 -06:00
zorro.txt: standardize document format
2017-07-14 13:58:12 -06:00
c76adee347
