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I received a report about suspicious growth of unreclaimable slabs on
some machines. I've found that it happens on machines with low memory
pressure, and these unreclaimable slabs are external names attached to
dentries.
External names are allocated using generic kmalloc() function, so they
are accounted as unreclaimable. But they are held by dentries, which
are reclaimable, and they will be reclaimed under the memory pressure.
In particular, this breaks MemAvailable calculation, as it doesn't take
unreclaimable slabs into account. This leads to a silly situation, when
a machine is almost idle, has no memory pressure and therefore has a big
dentry cache. And the resulting MemAvailable is too low to start a new
workload.
To address the issue, the NR_INDIRECTLY_RECLAIMABLE_BYTES counter is
used to track the amount of memory, consumed by external names. The
counter is increased in the dentry allocation path, if an external name
structure is allocated; and it's decreased in the dentry freeing path.
To reproduce the problem I've used the following Python script:
import os
for iter in range (0, 10000000):
try:
name = ("/some_long_name_%d" % iter) + "_" * 220
os.stat(name)
except Exception:
pass
Without this patch:
$ cat /proc/meminfo | grep MemAvailable
MemAvailable: 7811688 kB
$ python indirect.py
$ cat /proc/meminfo | grep MemAvailable
MemAvailable: 2753052 kB
With the patch:
$ cat /proc/meminfo | grep MemAvailable
MemAvailable: 7809516 kB
$ python indirect.py
$ cat /proc/meminfo | grep MemAvailable
MemAvailable: 7749144 kB
[[email protected]: fix indirectly reclaimable memory accounting for CONFIG_SLOB]
Link: http://lkml.kernel.org/r/[email protected]
[[email protected]: fix indirectly reclaimable memory accounting]
Link: http://lkml.kernel.org/r/[email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Roman Gushchin <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Mel Gorman <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Adjust /proc/meminfo MemAvailable calculation by adding the amount of
indirectly reclaimable memory (rounded to the PAGE_SIZE).
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Roman Gushchin <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Mel Gorman <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Patch series "indirectly reclaimable memory", v2.
This patchset introduces the concept of indirectly reclaimable memory
and applies it to fix the issue of when a big number of dentries with
external names can significantly affect the MemAvailable value.
This patch (of 3):
Introduce a concept of indirectly reclaimable memory and adds the
corresponding memory counter and /proc/vmstat item.
Indirectly reclaimable memory is any sort of memory, used by the kernel
(except of reclaimable slabs), which is actually reclaimable, i.e. will
be released under memory pressure.
The counter is in bytes, as it's not always possible to count such
objects in pages. The name contains BYTES by analogy to
NR_KERNEL_STACK_KB.
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Roman Gushchin <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Mel Gorman <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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* pm-cpuidle:
tick-sched: avoid a maybe-uninitialized warning
cpuidle: Add definition of residency to sysfs documentation
time: hrtimer: Use timerqueue_iterate_next() to get to the next timer
nohz: Avoid duplication of code related to got_idle_tick
nohz: Gather tick_sched booleans under a common flag field
cpuidle: menu: Avoid selecting shallow states with stopped tick
cpuidle: menu: Refine idle state selection for running tick
sched: idle: Select idle state before stopping the tick
time: hrtimer: Introduce hrtimer_next_event_without()
time: tick-sched: Split tick_nohz_stop_sched_tick()
cpuidle: Return nohz hint from cpuidle_select()
jiffies: Introduce USER_TICK_USEC and redefine TICK_USEC
sched: idle: Do not stop the tick before cpuidle_idle_call()
sched: idle: Do not stop the tick upfront in the idle loop
time: tick-sched: Reorganize idle tick management code
* pm-qos:
PM / QoS: mark expected switch fall-throughs
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I am interested in all ASPEED drivers, and the previous match wasn't
grabbing files in nested directories. Use N instead.
Add the arm kernel mailing list so that patches get reviewed there, and
the linux-aspeed list which exists only so I can use patchwork to track
patches.
Add Andrew as a reviewer, because he is involved in reviewing ASPEED
stuff.
Signed-off-by: Joel Stanley <[email protected]>
Acked-by: Andrew Jeffery <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
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grub-reboot selects the submenu's first menuentry (title is "1>0") rather than ktest's
menuentry (title is "2") by mistake.
===
$ sudo cat /boot/grub/grub.cfg | grep -E "^menuentry|^submenu"
...
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option '...' {
...
submenu 'Advanced options for Ubuntu' $menuentry_id_option '...' {
...
menuentry 'ktest' {
...
===
Correct it by taking submenu entries into account in get_grub2_index().
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Satoru Takeuchi <[email protected]>
Signed-off-by: Steven Rostedt (VMware) <[email protected]>
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Pull ceph updates from Ilya Dryomov:
"The big ticket items are:
- support for rbd "fancy" striping (myself).
The striping feature bit is now fully implemented, allowing mapping
v2 images with non-default striping patterns. This completes
support for --image-format 2.
- CephFS quota support (Luis Henriques and Zheng Yan).
This set is based on the new SnapRealm code in the upcoming v13.y.z
("Mimic") release. Quota handling will be rejected on older
filesystems.
- memory usage improvements in CephFS (Chengguang Xu).
Directory specific bits have been split out of ceph_file_info and
some effort went into improving cap reservation code to avoid OOM
crashes.
Also included a bunch of assorted fixes all over the place from
Chengguang and others"
* tag 'ceph-for-4.17-rc1' of git://github.com/ceph/ceph-client: (67 commits)
ceph: quota: report root dir quota usage in statfs
ceph: quota: add counter for snaprealms with quota
ceph: quota: cache inode pointer in ceph_snap_realm
ceph: fix root quota realm check
ceph: don't check quota for snap inode
ceph: quota: update MDS when max_bytes is approaching
ceph: quota: support for ceph.quota.max_bytes
ceph: quota: don't allow cross-quota renames
ceph: quota: support for ceph.quota.max_files
ceph: quota: add initial infrastructure to support cephfs quotas
rbd: remove VLA usage
rbd: fix spelling mistake: "reregisteration" -> "reregistration"
ceph: rename function drop_leases() to a more descriptive name
ceph: fix invalid point dereference for error case in mdsc destroy
ceph: return proper bool type to caller instead of pointer
ceph: optimize memory usage
ceph: optimize mds session register
libceph, ceph: add __init attribution to init funcitons
ceph: filter out used flags when printing unused open flags
ceph: don't wait on writeback when there is no more dirty pages
...
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git://git.infradead.org/linux-platform-drivers-x86
Pull x86 platform driver updates from Andy Shevchenko:
- Dell SMBIOS driver fixed against memory leaks.
- The fujitsu-laptop driver is cleaned up and now supports hotkeys for
Lifebook U7x7 models. Besides that the typo introduced by one of
previous clean up series has been fixed.
- Specific to x86-based laptops HID device now supports
KEY_ROTATE_LOCK_TOGGLE event which is emitted, for example, by Wacom
MobileStudio Pro 13.
- Turbo MAX 3 technology is enabled for the rest of platforms that
support Hardware-P-States feature which have core priority described
by ACPI CPPC table.
- Mellanox on x86 gets better support of I2C bus in use including
support of hotpluggable ones.
- Silead touchscreen is enabled on two tablet models, i.e Yours Y8W81
and I.T.Works TW701.
- From now on the second fan on Thinkpad P50 is supported.
- The topstar-laptop driver is reworked to support new models, in
particular Topstar U931.
* tag 'platform-drivers-x86-v4.17-1' of git://git.infradead.org/linux-platform-drivers-x86: (41 commits)
platform/x86: thinkpad_acpi: Add 2nd Fan Support for Thinkpad P50
platform/x86: dell-smbios: Fix memory leaks in build_tokens_sysfs()
intel-hid: support KEY_ROTATE_LOCK_TOGGLE
intel-hid: clean up and sort header files
platform/x86: silead_dmi: Add entry for the Yours Y8W81 tablet
platform/x86: fujitsu-laptop: Support Lifebook U7x7 hotkeys
platform/x86: mlx-platform: Add physical bus number auto detection
platform/mellanox: mlxreg-hotplug: Change input for device create routine
platform/x86: mlx-platform: Add deffered bus functionality
platform/x86: mlx-platform: Use define for the channel numbers
platform/x86: fujitsu-laptop: Revert UNSUPPORTED_CMD back to an int
platform/x86: Fix dell driver init order
platform/x86: dell-smbios: Resolve dependency error on ACPI_WMI
platform/x86: dell-smbios: Resolve dependency error on DCDBAS
platform/x86: Allow for SMBIOS backend defaults
platform/x86: dell-smbios: Link all dell-smbios-* modules together
platform/x86: dell-smbios: Rename dell-smbios source to dell-smbios-base
platform/x86: dell-smbios: Correct some style warnings
platform/x86: wmi: Fix misuse of vsprintf extension %pULL
platform/x86: intel-hid: Reset wakeup capable flag on removal
...
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Pull dmaengine updates from Vinod Koul:
"This time we have couple of new drivers along with updates to drivers:
- new drivers for the DesignWare AXI DMAC and MediaTek High-Speed DMA
controllers
- stm32 dma and qcom bam dma driver updates
- norandom test option for dmatest"
* tag 'dmaengine-4.17-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (30 commits)
dmaengine: stm32-dma: properly mask irq bits
dmaengine: stm32-dma: fix max items per transfer
dmaengine: stm32-dma: fix DMA IRQ status handling
dmaengine: stm32-dma: Improve memory burst management
dmaengine: stm32-dma: fix typo and reported checkpatch warnings
dmaengine: stm32-dma: fix incomplete configuration in cyclic mode
dmaengine: stm32-dma: threshold manages with bitfield feature
dt-bindings: stm32-dma: introduce DMA features bitfield
dt-bindings: rcar-dmac: Document r8a77470 support
dmaengine: rcar-dmac: Fix too early/late system suspend/resume callbacks
dmaengine: dw-axi-dmac: fix spelling mistake: "catched" -> "caught"
dmaengine: edma: Check the memory allocation for the memcpy dma device
dmaengine: at_xdmac: fix rare residue corruption
dmaengine: mediatek: update MAINTAINERS entry with MediaTek DMA driver
dmaengine: mediatek: Add MediaTek High-Speed DMA controller for MT7622 and MT7623 SoC
dt-bindings: dmaengine: Add MediaTek High-Speed DMA controller bindings
dt-bindings: Document the Synopsys DW AXI DMA bindings
dmaengine: Introduce DW AXI DMAC driver
dmaengine: pl330: fix a race condition in case of threaded irqs
dmaengine: imx-sdma: fix pagefault when channel is disabled during interrupt
...
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Pull remoteproc updates from Bjorn Andersson:
- add support for generating coredumps for remoteprocs using
devcoredump
- add the Qualcomm sysmon driver for intra-remoteproc crash handling
- a number of fixes in Qualcomm and IMX drivers
* tag 'rproc-v4.17' of git://github.com/andersson/remoteproc:
remoteproc: fix null pointer dereference on glink only platforms
soc: qcom: qmi: add CONFIG_NET dependency
remoteproc: imx_rproc: Slightly simplify code in 'imx_rproc_probe()'
remoteproc: imx_rproc: Re-use existing error handling path in 'imx_rproc_probe()'
remoteproc: imx_rproc: Fix an error handling path in 'imx_rproc_probe()'
samples: Introduce Qualcomm QMI sample client
remoteproc: qcom: Introduce sysmon
remoteproc: Pass type of shutdown to subdev remove
remoteproc: qcom: Register segments for core dump
soc: qcom: mdt-loader: Return relocation base
remoteproc: Rename "load_rsc_table" to "parse_fw"
remoteproc: Add remote processor coredump support
remoteproc: Remove null character write of shared mem
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Pull rpmsg updates from Bjorn Andersson:
- transition the rpmsg_trysend() code paths of SMD and GLINK to use
non-sleeping locks
- revert the overly optimistic handling of discovered SMD channels
- fix an issue in SMD where incoming messages race with the probing of
a client driver
* tag 'rpmsg-v4.17' of git://github.com/andersson/remoteproc:
rpmsg: smd: Use announce_create to process any receive work
rpmsg: Only invoke announce_create for rpdev with endpoints
rpmsg: smd: Fix container_of macros
Revert "rpmsg: smd: Create device for all channels"
rpmsg: glink: Use spinlock in tx path
rpmsg: smd: Use spinlock in tx path
rpmsg: smd: use put_device() if device_register fail
rpmsg: glink: use put_device() if device_register fail
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Pull c6x updates from Mark Salter.
* tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming:
c6x: pass endianness info to sparse
c6x: fix platforms/plldata.c get_coreid build error
c6x: remove unused KTHREAD_SIZE definition
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git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips
Pull MIPS updates from James Hogan:
"These are the main MIPS changes for 4.17. Rough overview:
(1) generic platform: Add support for Microsemi Ocelot SoCs
(2) crypto: Add CRC32 and CRC32C HW acceleration module
(3) Various cleanups and misc improvements
More detailed summary:
Miscellaneous:
- hang more efficiently on halt/powerdown/restart
- pm-cps: Block system suspend when a JTAG probe is present
- expand make help text for generic defconfigs
- refactor handling of legacy defconfigs
- determine the entry point from the ELF file header to fix microMIPS
for certain toolchains
- introduce isa-rev.h for MIPS_ISA_REV and use to simplify other code
Minor cleanups:
- DTS: boston/ci20: Unit name cleanups and correction
- kdump: Make the default for PHYSICAL_START always 64-bit
- constify gpio_led in Alchemy, AR7, and TXX9
- silence a couple of W=1 warnings
- remove duplicate includes
Platform support:
Generic platform:
- add support for Microsemi Ocelot
- dt-bindings: Add vendor prefix for Microsemi Corporation
- dt-bindings: Add bindings for Microsemi SoCs
- add ocelot SoC & PCB123 board DTS files
- MAINTAINERS: Add entry for Microsemi MIPS SoCs
- enable crc32-mips on r6 configs
ath79:
- fix AR724X_PLL_REG_PCIE_CONFIG offset
BCM47xx:
- firmware: Use mac_pton() for MAC address parsing
- add Luxul XAP1500/XWR1750 WiFi LEDs
- use standard reset button for Luxul XWR-1750
BMIPS:
- enable CONFIG_BRCMSTB_PM in bmips_stb_defconfig for build coverage
- add STB PM, wake-up timer, watchdog DT nodes
Octeon:
- drop '.' after newlines in printk calls
ralink:
- pci-mt7621: Enable PCIe on MT7688"
* tag 'mips_4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips: (37 commits)
MIPS: BCM47XX: Use standard reset button for Luxul XWR-1750
MIPS: BCM47XX: Add Luxul XAP1500/XWR1750 WiFi LEDs
MIPS: Make the default for PHYSICAL_START always 64-bit
MIPS: Use the entry point from the ELF file header
MAINTAINERS: Add entry for Microsemi MIPS SoCs
MIPS: generic: Add support for Microsemi Ocelot
MIPS: mscc: Add ocelot PCB123 device tree
MIPS: mscc: Add ocelot dtsi
dt-bindings: mips: Add bindings for Microsemi SoCs
dt-bindings: Add vendor prefix for Microsemi Corporation
MIPS: ath79: Fix AR724X_PLL_REG_PCIE_CONFIG offset
MIPS: pci-mt7620: Enable PCIe on MT7688
MIPS: pm-cps: Block system suspend when a JTAG probe is present
MIPS: VDSO: Replace __mips_isa_rev with MIPS_ISA_REV
MIPS: BPF: Replace __mips_isa_rev with MIPS_ISA_REV
MIPS: cpu-features.h: Replace __mips_isa_rev with MIPS_ISA_REV
MIPS: Introduce isa-rev.h to define MIPS_ISA_REV
MIPS: Hang more efficiently on halt/powerdown/restart
FIRMWARE: bcm47xx_nvram: Replace mac address parsing
MIPS: BMIPS: Add Broadcom STB watchdog nodes
...
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt:
"New features:
- Tom Zanussi's extended histogram work.
This adds the synthetic events to have histograms from multiple
event data Adds triggers "onmatch" and "onmax" to call the
synthetic events Several updates to the histogram code from this
- Allow way to nest ring buffer calls in the same context
- Allow absolute time stamps in ring buffer
- Rewrite of filter code parsing based on Al Viro's suggestions
- Setting of trace_clock to global if TSC is unstable (on boot)
- Better OOM handling when allocating large ring buffers
- Added initcall tracepoints (consolidated initcall_debug code with
them)
And other various fixes and clean ups"
* tag 'trace-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (68 commits)
init: Have initcall_debug still work without CONFIG_TRACEPOINTS
init, tracing: Have printk come through the trace events for initcall_debug
init, tracing: instrument security and console initcall trace events
init, tracing: Add initcall trace events
tracing: Add rcu dereference annotation for test func that touches filter->prog
tracing: Add rcu dereference annotation for filter->prog
tracing: Fixup logic inversion on setting trace_global_clock defaults
tracing: Hide global trace clock from lockdep
ring-buffer: Add set/clear_current_oom_origin() during allocations
ring-buffer: Check if memory is available before allocation
lockdep: Add print_irqtrace_events() to __warn
vsprintf: Do not preprocess non-dereferenced pointers for bprintf (%px and %pK)
tracing: Uninitialized variable in create_tracing_map_fields()
tracing: Make sure variable string fields are NULL-terminated
tracing: Add action comparisons when testing matching hist triggers
tracing: Don't add flag strings when displaying variable references
tracing: Fix display of hist trigger expressions containing timestamps
ftrace: Drop a VLA in module_exists()
tracing: Mention trace_clock=global when warning about unstable clocks
tracing: Default to using trace_global_clock if sched_clock is unstable
...
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Export the number of successful and failed hugetlb page
allocations via the virtio balloon driver. These 2 counts
come directly from the vm_events HTLB_BUDDY_PGALLOC and
HTLB_BUDDY_PGALLOC_FAIL.
Signed-off-by: Jonathan Helman <[email protected]>
Signed-off-by: Michael S. Tsirkin <[email protected]>
Reviewed-by: Jason Wang <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull libnvdimm updates from Dan Williams:
"This cycle was was not something I ever want to repeat as there were
several late changes that have only now just settled.
Half of the branch up to commit d2c997c0f145 ("fs, dax: use
page->mapping to warn...") have been in -next for several releases.
The of_pmem driver and the address range scrub rework were late
arrivals, and the dax work was scaled back at the last moment.
The of_pmem driver missed a previous merge window due to an oversight.
A sense of obligation to rectify that miss is why it is included for
4.17. It has acks from PowerPC folks. Stephen reported a build failure
that only occurs when merging it with your latest tree, for now I have
fixed that up by disabling modular builds of of_pmem. A test merge
with your tree has received a build success report from the 0day robot
over 156 configs.
An initial version of the ARS rework was submitted before the merge
window. It is self contained to libnvdimm, a net code reduction, and
passing all unit tests.
The filesystem-dax changes are based on the wait_var_event()
functionality from tip/sched/core. However, late review feedback
showed that those changes regressed truncate performance to a large
degree. The branch was rewound to drop the truncate behavior change
and now only includes preparation patches and cleanups (with full acks
and reviews). The finalization of this dax-dma-vs-trnucate work will
need to wait for 4.18.
Summary:
- A rework of the filesytem-dax implementation provides for detection
of unmap operations (truncate / hole punch) colliding with
in-progress device-DMA. A fix for these collisions remains a
work-in-progress pending resolution of truncate latency and
starvation regressions.
- The of_pmem driver expands the users of libnvdimm outside of x86
and ACPI to describe an implementation of persistent memory on
PowerPC with Open Firmware / Device tree.
- Address Range Scrub (ARS) handling is completely rewritten to
account for the fact that ARS may run for 100s of seconds and there
is no platform defined way to cancel it. ARS will now no longer
block namespace initialization.
- The NVDIMM Namespace Label implementation is updated to handle
label areas as small as 1K, down from 128K.
- Miscellaneous cleanups and updates to unit test infrastructure"
* tag 'libnvdimm-for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm: (39 commits)
libnvdimm, of_pmem: workaround OF_NUMA=n build error
nfit, address-range-scrub: add module option to skip initial ars
nfit, address-range-scrub: rework and simplify ARS state machine
nfit, address-range-scrub: determine one platform max_ars value
powerpc/powernv: Create platform devs for nvdimm buses
doc/devicetree: Persistent memory region bindings
libnvdimm: Add device-tree based driver
libnvdimm: Add of_node to region and bus descriptors
libnvdimm, region: quiet region probe
libnvdimm, namespace: use a safe lookup for dimm device name
libnvdimm, dimm: fix dpa reservation vs uninitialized label area
libnvdimm, testing: update the default smart ctrl_temperature
libnvdimm, testing: Add emulation for smart injection commands
nfit, address-range-scrub: introduce nfit_spa->ars_state
libnvdimm: add an api to cast a 'struct nd_region' to its 'struct device'
nfit, address-range-scrub: fix scrub in-progress reporting
dax, dm: allow device-mapper to operate without dax support
dax: introduce CONFIG_DAX_DRIVER
fs, dax: use page->mapping to warn if truncate collides with a busy page
ext2, dax: introduce ext2_dax_aops
...
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git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
Pull RTC updates from Alexandre Belloni:
"This contains a few series that have been in preparation for a while
and that will help systems with RTCs that will fail in 2038, 2069 or
2100.
Subsystem:
- Add tracepoints
- Rework of the RTC/nvmem API to allow drivers to discard struct
nvmem_config after registration
- New range API, drivers can now expose the useful range of the RTC
- New offset API the core is now able to add an offset to the RTC
time, modifying the supported range.
- Multiple rtc_time64_to_tm fixes
- Handle time_t overflow on 32 bit platforms in the core instead of
letting drivers do crazy things.
- remove rtc_control API
New driver:
- Intersil ISL12026
Drivers:
- Drivers exposing the RTC non volatile memory have been converted to
use nvmem
- Removed useless time and date validation
- Removed an indirection pattern that was a cargo cult from ancient
drivers
- Removed VLA usage
- Fixed a possible race condition in probe functions
- AB8540 support is dropped from ab8500
- pcf85363 now has alarm support"
* tag 'rtc-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (128 commits)
rtc: snvs: Fix usage of snvs_rtc_enable
rtc: mt7622: fix module autoloading for OF platform drivers
rtc: isl12022: use true and false for boolean values
rtc: ab8500: Drop AB8540 support
rtc: remove a warning during scripts/kernel-doc step
rtc: 88pm860x: remove artificial limitation
rtc: 88pm80x: remove artificial limitation
rtc: st-lpc: remove artificial limitation
rtc: mrst: remove artificial limitation
rtc: mv: remove artificial limitation
rtc: hctosys: Ensure system time doesn't overflow time_t
parisc: time: stop validating rtc_time in .read_time
rtc: pcf85063: fix clearing bits in pcf85063_start_clock
rtc: at91sam9: Set name of regmap_config
rtc: s5m: Remove VLA usage
rtc: s5m: Move enum from rtc.h to rtc-s5m.c
rtc: remove VLA usage
rtc: Add useful timestamp definitions
rtc: Add one offset seconds to expand RTC range
rtc: Factor out the RTC range validation into rtc_valid_range()
...
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Pull fbdev updates from Bartlomiej Zolnierkiewicz:
"There is nothing really major here, just a couple of small bugfixes,
improvements and cleanups:
- make it possible to load radeonfb driver when offb driver is loaded
first (Mathieu Malaterre)
- fix memory leak in offb driver (Mathieu Malaterre)
- fix unaligned access in udlfb driver (Ladislav Michl)
- convert atmel_lcdfb driver to use GPIO descriptors (Ludovic
Desroches)
- avoid mismatched prototypes in sisfb driver (Arnd Bergmann)
- remove VLA usage from viafb driver (Gustavo A. R. Silva)
- add missing help text to FB_I810_I2 config option (Ulf Magnusson)
- misc fixes (Gustavo A. R. Silva, Colin Ian King, Markus Elfring)
- remove dead code from s3c-fb driver for Exynos and S5PV210
platforms
- misc cleanups (Corentin Labbe, Ladislav Michl, Ulf Magnusson,
Vladimir Zapolskiy, Markus Elfring)"
* tag 'fbdev-v4.17' of git://github.com/bzolnier/linux: (32 commits)
video: fbdev: s3c-fb: remove dead platform code for Exynos and S5PV210 platforms
video: au1100fb: Delete an unnecessary variable initialisation in au1100fb_drv_probe()
video: au1100fb: Improve a size determination in au1100fb_drv_probe()
video: au1100fb: Delete an error message for a failed memory allocation in au1100fb_drv_probe()
video/console/sticore: Delete an error message for a failed memory allocation in sti_try_rom_generic()
video: ARM CLCD: Improve a size determination in clcdfb_probe()
video: ARM CLCD: Delete an error message for a failed memory allocation in clcdfb_probe()
video: matroxfb: Delete an error message for a failed memory allocation in matroxfb_crtc2_probe()
video: s3c-fb: Improve a size determination in s3c_fb_probe()
video: s3c-fb: Delete an error message for a failed memory allocation in s3c_fb_probe()
video: fsl-diu-fb: Delete an error message for a failed memory allocation in fsl_diu_init()
video: ssd1307fb: Improve a size determination in ssd1307fb_probe()
video: smscufx: Delete an error message for a failed memory allocation in ufx_realloc_framebuffer()
video: smscufx: Return an error code only as a constant in ufx_realloc_framebuffer()
video: smscufx: Less checks in ufx_usb_probe() after error detection
video: udlfb: Return an error code only as a constant in dlfb_realloc_framebuffer()
video/fbdev/stifb: Delete an error message for a failed memory allocation in stifb_init_fb()
video/fbdev/stifb: Return -ENOMEM after a failed kzalloc() in stifb_init_fb()
video: fbdev: aty128fb: use true and false for boolean values
fbdev: aty: fix missing indentation in if statement
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"The main purpose of this pull request is a fix for a regression in the
recent PCM OSS emulation code that may lead to RCU stall. Since
syzkaller hits this too often, I send the pull request now with a
minimal collection. Possibly another pull request may follow before
RC1.
The other fixes here are for USB-audio class 2 and 3 to improve the
parser for the clock descriptors. These are rather cleanups but good
for security, too.
Last but not least, another included fix is the trivial one to remove
superfluous WARN_ON() that annoyed syzbot"
* tag 'sound-fix-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: pcm: Remove WARN_ON() at snd_pcm_hw_params() error
ALSA: pcm: Fix endless loop for XRUN recovery in OSS emulation
ALSA: usb-audio: Add sanity checks in UAC3 clock parsers
ALSA: usb-audio: More strict sanity checks for clock parsers
ALSA: usb-audio: Refactor clock finder helpers
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git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media fixes from Mauro Carvalho Chehab:
"A series of media updates/fixes for 4.17.
There are two important core fix patches in this series:
- A regression fix on Kernel 4.16 with causes it to not work with
some input devices that depend on media core
- A fix at compat32 bits with causes it to OOPS on overlay, and
affects the Kernels where the CVE-2017-13166 was backported
The remaining ones are other random fixes at the documentation and on
drivers.
The biggest part of this series is a set of 18 patches for the Intel
atomisp driver. Currently, it produces hundreds of warnings/errors on
sparse/smatch, causing me to sometimes ignore new warnings on other
drivers that are not so broken. This driver is on really poor state,
even for staging standards: it has several layers of abstraction on
it, and it supports two different hardware. Selecting between them
require to add a define (there isn't even a Kconfig option for such
purpose). Just on this smatch cleanup, I could easily get rid of 8
"do-nothing" files. So, I'm seriously considering its removal from
upstream, if I don't see any real work on addressing the problems
there along this year"
* tag 'media/v4.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (48 commits)
media: v4l2-core: fix size of devnode_nums[] bitarray
media: v4l2-compat-ioctl32: don't oops on overlay
media: i2c: adv748x: afe: fix sparse warning
media: extended-controls.rst: transmitter -> receiver
media: staging: atomisp: stop duplicating input format types
media: staging: atomisp: get rid of an unused var
media: staging: atomisp: stop mixing enum types
media: staging: atomisp: get rid of some static warnings
media: staging: atomisp: use %p to print pointers
media: staging: atomisp: remove an useless check
media: staging: atomisp: avoid a warning if 32 bits build
media: staging: atomisp: don't access a NULL var
media: staging: atomisp: Get rid of *default.host.[ch]
media: staging: atomisp: get rid of an unused function
media: staging: atomisp: remove unused set_pd_base()
media: staging: atomisp: fix endianess issues
media: staging: atomisp: add a missing include
media: staging: atomisp: get rid of stupid statements
media: staging: atomisp: declare static vars as such
media: staging: atomisp: ia_css_output.host: don't use var before check
...
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The linux-oxnas migrates from tuxfamily to groups.io for a simpler
administration and maintainance.
Signed-off-by: Neil Armstrong <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
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This patch Enable ARM L2 cache module in Nuvoton NPCM7xx BMC
by adding L2 cache parameters into NPCM7xx DT machine start structure.
At patch V7 arm: npcm: add basic support for Nuvoton BMCs we got comments
regarding the flags use in L2 cache module.
- https://www.spinics.net/lists/arm-kernel/msg613212.html
After checking again the L2 cache use in the NPCM7xx,
the only L2 cache flag we need to set is L2C_AUX_CTRL_SHARED_OVERRIDE
and it is done in the device tree:
https://patchwork.kernel.org/patch/10063497/
L2 cache flag mask allowed all the flag option.
Signed-off-by: Tomer Maimon <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
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Now that we hardened writeX() API in asm-generic version, writeX_relaxed()
API is violating the rules when writeX_relaxed() == writeX() in the default
implementation.
The relaxed API shouldn't have any barriers in it and it doesn't provide
any ordering with respect to the memory transactions. The only requirement
is for writes to be ordered with respect to each other. This is achieved
by the volatile in the __raw_writeX() API.
Open code the relaxed API and remove any barriers in it.
Signed-off-by: Sinan Kaya <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
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Now that we hardened readX() API in asm-generic version, readX_relaxed()
API is violating the rules when readX_relaxed() == readX() in the default
implementation.
The relaxed API shouldn't have any barriers in it and it doesn't provide
any ordering with respect to the memory transactions. The only requirement
is for reads to be ordered with respect to each other. This is achieved
by the volatile in the __raw_readX() API.
Open code the relaxed API and remove any barriers in it.
Signed-off-by: Sinan Kaya <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
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c6x depends on the macro '_BIG_ENDIAN' being defined or not
to correctly select or define endian-specific macros, structures
or pieces of code.
This macro is predefined by the compiler but sparse knows nothing
about it and thus may pre-process files differently from what
gcc would.
Fix this by passing '-D_BIG_ENDIAN' when compiling a big-endian
kernel, like GCC would have done.
To: Mark Salter <[email protected]>
To: Aurelien Jacquiot <[email protected]>
CC: [email protected]
Signed-off-by: Luc Van Oostenryck <[email protected]>
Signed-off-by: Mark Salter <[email protected]>
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Fix build error reported by the 0day bot by including the header
file for that macro.
Fixes this build error: (should fix; not tested)
arch/c6x/platforms/plldata.c: In function 'c6472_setup_clocks':
arch/c6x/platforms/plldata.c:279:33: error: implicit declaration of function 'get_coreid'; did you mean 'get_order'? [-Werror=implicit-function-declaration]
c6x_core_clk.parent = &sysclks[get_coreid() + 1];
Reported-by: Fengguang Wu <[email protected]>
Cc: Mark Salter <[email protected]>
Cc: Aurelien Jacquiot <[email protected]>
Cc: [email protected]
Cc: Ingo Molnar <[email protected]>
Signed-off-by: Randy Dunlap <[email protected]>
Signed-off-by: Mark Salter <[email protected]>
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KTHREAD_SIZE has never been used since it has been defined for c6x arch.
Let's remove this useless definition.
Signed-off-by: Jérémy Lefaure <[email protected]>
Signed-off-by: Mark Salter <[email protected]>
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The use of bitfields seems to confuse gcc, leading to a false-positive
warning in all compiler versions:
kernel/time/tick-sched.c: In function 'tick_nohz_idle_exit':
kernel/time/tick-sched.c:538:2: error: 'now' may be used uninitialized in this function [-Werror=maybe-uninitialized]
This introduces a temporary variable to track the flags so gcc
doesn't have to evaluate twice, eliminating the code path that
leads to the warning.
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85301
Fixes: 1cae544d42d2 ("nohz: Gather tick_sched booleans under a common flag field")
Signed-off-by: Arnd Bergmann <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
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This isn't used anymore. Remove the helper and update documentation
accordingly.
Signed-off-by: Viresh Kumar <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
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The cpufreq core is already validating the CPU frequency table after
calling the ->init() callback of the cpufreq drivers and the drivers
don't need to do the same anymore. Though they need to set the
policy->freq_table field directly from the ->init() callback now.
Stop validating the frequency table from SCMI driver.
Signed-off-by: Viresh Kumar <[email protected]>
Acked-by: Sudeep Holla <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
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When multiple CPUs are related in one cpufreq policy, the first online
CPU will be chosen by default to handle cpufreq operations. Let's take
cpu0 and cpu1 as an example.
When cpu0 is offline, policy->cpu will be shifted to cpu1. cpu1's perf
capabilities should be initialized. Otherwise, perf capabilities are 0s
and speed change can not take effect.
This patch copies perf capabilities of the first online CPU to other
shared CPUs when policy shared type is CPUFREQ_SHARED_TYPE_ANY.
Acked-by: Viresh Kumar <[email protected]>
Signed-off-by: Shunyong Yang <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
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There was no clk_put() balancing the clk_get(). This commit fixes it.
Fixes: 92ce45fb875d (cpufreq: Add DVFS support for Armada 37xx)
Cc: 4.16+ <[email protected]> # 4.16+
Reported-by: Thomas Petazzoni <[email protected]>
Signed-off-by: Gregory CLEMENT <[email protected]>
Acked-by: Viresh Kumar <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
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Now that the driver has started to set transition_delay_us directly,
there is no need to set transition_latency along with it, as it is not
used by the cpufreq core.
Signed-off-by: Viresh Kumar <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
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This driver can not be built as a module and there is no need of the
platform driver unregister part. Use builtin_platform_driver() instead
of module_platform_driver().
Signed-off-by: Viresh Kumar <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
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The intel_pstate driver doesn't use debugfs any more, so drop
linux/debugfs.h from the list of included headers in it.
Signed-off-by: Rafael J. Wysocki <[email protected]>
Acked-by: Viresh Kumar <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon updates from Guenter Roeck:
- added chip support: new Centaur CPUs, ADM1272, NCT6796D
- ucd9000: added debugfs attributes, gpio support
- cleanup and minor bug fixes
* tag 'hwmon-for-linus-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (via-cputemp) support new centaur CPUs
hwmon: (nct6775) Fix writing pwmX_mode
hwmon: (lm92) Add max6635 to lm92_id[]
hwmon: (pmbus/adm1275) Add support for ADM1272
hwmon: (lm92) Do not try to detect MAX6635
hwmon: (ucd9000) Add debugfs attributes to provide mfr_status
hwmon: (ucd9000) Add gpio chip interface
hwmon: (nct6775) Add support for NCT6796D
hwmon: (nct6775) Initialize boolean variables with declaration
hwmon: (nct6775) Improve fan6/pwm6 support
hwmon: (nct6775) Use NUM_FAN consistently
hwmon: (g762) handle cleanup with devm_add_action
hwmon: (sht3x) Update data sheet URL
hwmon: (sht21) Update data sheet URLs
hwmon: (pmbus/adm1275) Accept negative page register values
hwmon: (pmbus/max8688) Accept negative page register values
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Pull networking fixes from David Miller:
1) The sockmap code has to free socket memory on close if there is
corked data, from John Fastabend.
2) Tunnel names coming from userspace need to be length validated. From
Eric Dumazet.
3) arp_filter() has to take VRFs properly into account, from Miguel
Fadon Perlines.
4) Fix oops in error path of tcf_bpf_init(), from Davide Caratti.
5) Missing idr_remove() in u32_delete_key(), from Cong Wang.
6) More syzbot stuff. Several use of uninitialized value fixes all
over, from Eric Dumazet.
7) Do not leak kernel memory to userspace in sctp, also from Eric
Dumazet.
8) Discard frames from unused ports in DSA, from Andrew Lunn.
9) Fix DMA mapping and reset/failover problems in ibmvnic, from Thomas
Falcon.
10) Do not access dp83640 PHY registers prematurely after reset, from
Esben Haabendal.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (46 commits)
vhost-net: set packet weight of tx polling to 2 * vq size
net: thunderx: rework mac addresses list to u64 array
inetpeer: fix uninit-value in inet_getpeer
dp83640: Ensure against premature access to PHY registers after reset
devlink: convert occ_get op to separate registration
ARM: dts: ls1021a: Specify TBIPA register address
net/fsl_pq_mdio: Allow explicit speficition of TBIPA address
ibmvnic: Do not reset CRQ for Mobility driver resets
ibmvnic: Fix failover case for non-redundant configuration
ibmvnic: Fix reset scheduler error handling
ibmvnic: Zero used TX descriptor counter on reset
ibmvnic: Fix DMA mapping mistakes
tipc: use the right skb in tipc_sk_fill_sock_diag()
sctp: sctp_sockaddr_af must check minimal addr length for AF_INET6
net: dsa: Discard frames from unused ports
sctp: do not leak kernel memory to user space
soreuseport: initialise timewait reuseport field
ipv4: fix uninit-value in ip_route_output_key_hash_rcu()
dccp: initialize ireq->ir_mark
net: fix uninit-value in __hw_addr_add_ex()
...
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs namei updates from Al Viro:
- make lookup_one_len() safe with parent locked only shared(incoming
afs series wants that)
- fix of getname_kernel() regression from 2015 (-stable fodder, that
one).
* 'work.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
getname_kernel() needs to make sure that ->name != ->iname in long case
make lookup_one_len() safe to use with directory locked shared
new helper: __lookup_slow()
merge common parts of lookup_one_len{,_unlocked} into common helper
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git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux
Pull orangefs updates from Mike Marshall:
"Fixes and cleanups:
- Documentation cleanups
- removal of unused code
- make some structs static
- implement Orangefs vm_operations fault callout
- eliminate two single-use functions and put their cleaned up code in
line.
- replace a vmalloc/memset instance with vzalloc
- fix a race condition bug in wait code"
* tag 'for-linus-4.17-ofs' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
Orangefs: documentation updates
orangefs: document package install and xfstests procedure
orangefs: remove unused code
orangefs: make several *_operations structs static
orangefs: implement vm_ops->fault
orangefs: open code short single-use functions
orangefs: replace vmalloc and memset with vzalloc
orangefs: bug fix for a race condition when getting a slot
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git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull pstore fix from Kees Cook:
"Fix another compression Kconfig combination missed in testing (Tobias
Regnery)"
* tag 'pstore-v4.17-rc1-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
pstore: fix crypto dependencies without compression
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