GKI (arm64) relevant 75 out of 419 changes, affecting 91 files +700/-304
38a1aa02b9 exec: fix up /proc/pid/comm in the execveat(AT_EMPTY_PATH) case [2 files, +29/-4]
e5ff8d825d sched: Don't try to catch up excess steal time. [1 file, +4/-2]
404e5fd918 printk: Fix signed integer overflow when defining LOG_BUF_LEN_MAX [1 file, +1/-1]
b006aadf72 drm/connector: add mutex to protect ELD from concurrent access [3 files, +11/-1]
22a1a75818 ring-buffer: Make reading page consistent with the code logic [1 file, +3/-1]
5c2b1d9386 tun: fix group permission check [1 file, +9/-5]
f4b8bac3cf mmc: core: Respect quirk_max_rate for non-UHS SDIO card [1 file, +2/-0]
e557b15ea2 HID: multitouch: Add quirk for Hantick 5288 touchpad [1 file, +5/-0]
adcb8ce68d HID: Wacom: Add PCI Wacom device support [1 file, +5/-0]
ebb90f23f0 Bluetooth: MGMT: Fix slab-use-after-free Read in mgmt_remove_adv_monitor_sync [1 file, +11/-1]
c257c15845 tipc: re-order conditions in tipc_crypto_key_rcv() [1 file, +2/-2]
90778f31ef ASoC: soc-pcm: don't use soc_pcm_ret() on .prepare callback [1 file, +28/-4]
33a4a9f54a Input: allocate keycode for phone linking [1 file, +1/-0]
57e07d10b3 sched/fair: Fix inaccurate h_nr_runnable accounting with delayed dequeue [1 file, +19/-0]
bc85817e6b nvme: handle connectivity loss in nvme_set_queue_count [1 file, +7/-1]
5eba53a9ea nvme: make nvme_tls_attrs_group static [1 file, +1/-1]
83ebf741aa udp: gso: do not drop small packets when PMTU reduces [3 files, +30/-4]
3139a7024e ethtool: rss: fix hiding unsupported fields in dumps [1 file, +2/-1]
e40cb34b7f pfifo_tail_enqueue: Drop new packet when sch->limit == 0 [1 file, +3/-0]
6312555249 netem: Update sch->q.qlen before qdisc_tree_reduce_backlog() [1 file, +1/-1]
e36364d5d4 tun: revert fix group permission check [1 file, +5/-9]
181b23ca2e net: sched: Fix truncation of offloaded action statistics [1 file, +1/-1]
ac7b5f3e4d drm/client: Handle tiled displays better [1 file, +9/-0]
f735c9d4dc fs/proc: do_task_stat: Fix ESP not readable during coredump [1 file, +1/-1]
5a6520493c arm64/kvm: Configure HYP TCR.PS/DS based on host stage1 [1 file, +4/-4]
c66e5205fd arm64/sme: Move storage of reg_smidr to __cpuinfo_store_cpu() [2 files, +10/-13]
e5251ae5d3 arm64/mm: Reduce PA space to 48 bits when LPA2 is not enabled [3 files, +11/-7]
de3ffeb212 KVM: arm64: timer: Always evaluate the need for a soft timer [1 file, +1/-3]
f2f805ada6 KVM: Explicitly verify target vCPU is online in kvm_get_vcpu() [1 file, +9/-0]
691218a50c Bluetooth: L2CAP: handle NULL sock pointer in l2cap_sock_alloc [1 file, +2/-1]
ddfc234761 Bluetooth: L2CAP: accept zero as a special value for MTU auto-selection [1 file, +2/-2]
5a262628f4 seccomp: passthrough uretprobe systemcall without filtering [1 file, +12/-0]
2ce09aabe0 blk-cgroup: Fix class @block_class's subsystem refcount leakage [1 file, +1/-0]
ae959ab075 scsi: ufs: core: Fix the HIGH/LOW_TEMP Bit Definitions [1 file, +2/-2]
45ad3c7d62 of: Correct child specifier used as input of the 2nd nexus node [1 file, +1/-1]
e62c630810 of: address: Fix empty resource handling in __of_address_resource_bounds() [1 file, +5/-7]
4e4b3d4926 of: Fix of_find_node_opts_by_path() handling of alias+path+options [1 file, +3/-3]
5b91440ebe of: reserved-memory: Fix using wrong number of cells to get property 'alignment' [1 file, +2/-2]
ed0ad04c68 ring-buffer: Do not allow events in NMI with generic atomic64 cmpxchg() [1 file, +7/-2]
d0b81ea5a5 dm-crypt: don't update io->sector after kcryptd_crypt_write_io_submit() [1 file, +3/-11]
68a25ceb11 dm-crypt: track tag_offset in convert_context [1 file, +7/-6]
68f16d3034 block: don't revert iter for -EIOCBQUEUED [1 file, +3/-2]
0a14a2b841 Revert "media: uvcvideo: Require entities to have a non-zero unique ID" [1 file, +27/-43]
3d17a4bbf2 PCI: endpoint: Finish virtual EP removal in pci_epf_remove_vepf() [1 file, +1/-0]
36786d1a45 PCI: dwc: ep: Write BAR_MASK before iATU registers in pci_epc_set_bar() [1 file, +15/-13]
b5cacfd067 PCI: dwc: ep: Prevent changing BAR size/flags in pci_epc_set_bar() [1 file, +21/-1]
9fbac83100 nvme-pci: Add TUXEDO InfinityFlex to Samsung sleep quirk [1 file, +2/-1]
2c4cda456e nvme-pci: Add TUXEDO IBP Gen9 to Samsung sleep quirk [1 file, +1/-0]
0c77c0d754 scsi: ufs: core: Fix use-after free in init error and remove paths [4 files, +30/-32]
8db25d4c4a scsi: core: Do not retry I/Os during depopulation [1 file, +7/-2]
c287f18f64 rv: Reset per-task monitors also for idle tasks [1 file, +4/-0]
e456a88bdd hrtimers: Force migrate away hrtimers queued after CPUHP_AP_HRTIMERS_DYING [2 files, +83/-21]
2a54e8f118 kfence: skip __GFP_THISNODE allocations on NUMA systems [1 file, +2/-0]
b64b773087 soc: qcom: smem_state: fix missing of_node_put in error path [1 file, +2/-1]
5100391aca media: mc: fix endpoint iteration [1 file, +1/-1]
d2eac8b14a media: uvcvideo: Fix crash during unbind if gpio unit is in use [2 files, +22/-7]
4f534dd576 media: uvcvideo: Fix event flags in uvc_ctrl_send_events [1 file, +2/-2]
ac7737ed9a media: uvcvideo: Support partial control reads [1 file, +21/-0]
34fb9eb31d media: uvcvideo: Only save async fh if success [1 file, +11/-7]
e8a650dbc7 media: uvcvideo: Remove redundant NULL assignment [1 file, +1/-3]
438bda062b media: uvcvideo: Remove dangling pointers [3 files, +67/-3]
a403eca86c mm: gup: fix infinite loop within __get_longterm_locked [1 file, +4/-10]
4b69308314 mm/vmscan: accumulate nr_demoted for accurate demotion statistics [1 file, +4/-3]
4491159774 mm/compaction: fix UBSAN shift-out-of-bounds warning [1 file, +2/-1]
2c3109dcda nvmem: core: improve range check for nvmem_cell_write() [1 file, +2/-0]
35ae7910c3 io_uring: fix multishots with selected buffers [1 file, +2/-0]
be985aea92 io_uring/net: don't retry connect operation on EPOLLERR [2 files, +7/-0]
e398619920 i3c: master: Fix missing 'ret' assignment in set_speed() [1 file, +1/-1]
8b4120b3e0 misc: misc_minor_alloc to use ida for all dynamic/misc dynamic minors [1 file, +30/-9]
19fc795e9d maple_tree: simplify split calculation [1 file, +6/-17]
8441aea464 ptp: Ensure info->enable callback is always set [1 file, +8/-0]
c6dd70e5b4 timers/migration: Fix off-by-one root mis-connection [1 file, +9/-1]
45439a8b11 fs: prepend statmount.mnt_opts string with security_sb_mnt_opts() [1 file, +4/-0]
7db0365ee6 fs: fix adding security options to statmount.mnt_opt [1 file, +14/-15]
d49c64c1d7 statmount: let unset strings be empty [1 file, +12/-4]
Changes in 6.12.14
irqchip/lan966x-oic: Make CONFIG_LAN966X_OIC depend on CONFIG_MCHP_LAN966X_PCI
btrfs: fix assertion failure when splitting ordered extent after transaction abort
btrfs: do not output error message if a qgroup has been already cleaned up
btrfs: fix use-after-free when attempting to join an aborted transaction
arm64/mm: Ensure adequate HUGE_MAX_HSTATE
exec: fix up /proc/pid/comm in the execveat(AT_EMPTY_PATH) case
s390/stackleak: Use exrl instead of ex in __stackleak_poison()
btrfs: fix data race when accessing the inode's disk_i_size at btrfs_drop_extents()
btrfs: convert BUG_ON in btrfs_reloc_cow_block() to proper error handling
sched: Don't try to catch up excess steal time.
x86: Convert unreachable() to BUG()
locking/ww_mutex/test: Use swap() macro
lockdep: Fix upper limit for LOCKDEP_*_BITS configs
x86/amd_nb: Restrict init function to AMD-based systems
drm/virtio: New fence for every plane update
drm: Add panel backlight quirks
drm: panel-backlight-quirks: Add Framework 13 matte panel
drm: panel-backlight-quirks: Add Framework 13 glossy and 2.8k panels
nvkm/gsp: correctly advance the read pointer of GSP message queue
nvkm: correctly calculate the available space of the GSP cmdq buffer
drm/tests: hdmi: handle empty modes in find_preferred_mode()
drm/tests: hdmi: return meaningful value from set_connector_edid()
drm/amd/display: Populate chroma prefetch parameters, DET buffer fix
drm/amd/display: Overwriting dualDPP UBF values before usage
printk: Fix signed integer overflow when defining LOG_BUF_LEN_MAX
drm/connector: add mutex to protect ELD from concurrent access
drm/bridge: anx7625: use eld_mutex to protect access to connector->eld
drm/bridge: ite-it66121: use eld_mutex to protect access to connector->eld
drm/amd/display: use eld_mutex to protect access to connector->eld
drm/exynos: hdmi: use eld_mutex to protect access to connector->eld
drm/radeon: use eld_mutex to protect access to connector->eld
drm/sti: hdmi: use eld_mutex to protect access to connector->eld
drm/vc4: hdmi: use eld_mutex to protect access to connector->eld
drm/amd/display: Fix Mode Cutoff in DSC Passthrough to DP2.1 Monitor
drm/amdgpu: Don't enable sdma 4.4.5 CTXEMPTY interrupt
drm/amdkfd: Queue interrupt work to different CPU
drm/bridge: it6505: Change definition MAX_HDCP_DOWN_STREAM_COUNT
drm/bridge: it6505: fix HDCP Bstatus check
drm/bridge: it6505: fix HDCP encryption when R0 ready
drm/bridge: it6505: fix HDCP CTS compare V matching
drm/bridge: it6505: fix HDCP CTS KSV list wait timer
safesetid: check size of policy writes
drm/amd/display: Increase sanitizer frame larger than limit when compile testing with clang
drm/amd/display: Limit Scaling Ratio on DCN3.01
ring-buffer: Make reading page consistent with the code logic
wifi: rtw89: add crystal_cap check to avoid setting as overflow value
tun: fix group permission check
mmc: core: Respect quirk_max_rate for non-UHS SDIO card
mmc: sdhci-esdhc-imx: enable 'SDHCI_QUIRK_NO_LED' quirk for S32G
wifi: brcmsmac: add gain range check to wlc_phy_iqcal_gainparams_nphy()
tomoyo: don't emit warning in tomoyo_write_control()
mfd: lpc_ich: Add another Gemini Lake ISA bridge PCI device-id
wifi: rtw88: add __packed attribute to efuse layout struct
clk: qcom: Make GCC_8150 depend on QCOM_GDSC
HID: multitouch: Add quirk for Hantick 5288 touchpad
HID: Wacom: Add PCI Wacom device support
net/mlx5: use do_aux_work for PHC overflow checks
wifi: brcmfmac: Check the return value of of_property_read_string_index()
wifi: iwlwifi: pcie: Add support for new device ids
wifi: iwlwifi: avoid memory leak
i2c: Force ELAN06FA touchpad I2C bus freq to 100KHz
APEI: GHES: Have GHES honor the panic= setting
Bluetooth: btusb: Add new VID/PID 13d3/3610 for MT7922
Bluetooth: btusb: Add new VID/PID 13d3/3628 for MT7925
Bluetooth: MGMT: Fix slab-use-after-free Read in mgmt_remove_adv_monitor_sync
net: wwan: iosm: Fix hibernation by re-binding the driver around it
HID: hid-asus: Disable OOBE mode on the ProArt P16
mmc: sdhci-msm: Correctly set the load for the regulator
octeon_ep: update tx/rx stats locally for persistence
octeon_ep_vf: update tx/rx stats locally for persistence
tipc: re-order conditions in tipc_crypto_key_rcv()
selftests/net/ipsec: Fix Null pointer dereference in rtattr_pack()
net: ethernet: ti: am65-cpsw: ensure proper channel cleanup in error path
ASoC: SOF: Intel: hda-dai: Ensure DAI widget is valid during params
x86/kexec: Allocate PGD for x86_64 transition page tables separately
ASoC: Intel: sof_sdw: Correct quirk for Lenovo Yoga Slim 7
iommu/arm-smmu-qcom: add sdm670 adreno iommu compatible
iommu/arm-smmu-v3: Clean up more on probe failure
platform/x86: int3472: Check for adev == NULL
platform/x86: acer-wmi: Add support for Acer PH14-51
ASoC: soc-pcm: don't use soc_pcm_ret() on .prepare callback
platform/x86: acer-wmi: Add support for Acer Predator PH16-72
ASoC: amd: Add ACPI dependency to fix build error
Input: allocate keycode for phone linking
platform/x86: acer-wmi: add support for Acer Nitro AN515-58
platform/x86: acer-wmi: Ignore AC events
KVM: PPC: e500: Mark "struct page" dirty in kvmppc_e500_shadow_map()
KVM: PPC: e500: Mark "struct page" pfn accessed before dropping mmu_lock
KVM: PPC: e500: Use __kvm_faultin_pfn() to handle page faults
KVM: e500: always restore irqs
drm/amdgpu: Fix Circular Locking Dependency in AMDGPU GFX Isolation
xfs: report realtime block quota limits on realtime directories
xfs: don't over-report free space or inodes in statvfs
tty: xilinx_uartps: split sysrq handling
tty: Permit some TIOCL_SETSEL modes without CAP_SYS_ADMIN
platform/x86: serdev_helpers: Check for serial_ctrl_uid == NULL
sched/fair: Fix inaccurate h_nr_runnable accounting with delayed dequeue
nvme: handle connectivity loss in nvme_set_queue_count
firmware: iscsi_ibft: fix ISCSI_IBFT Kconfig entry
gpu: drm_dp_cec: fix broken CEC adapter properties check
ice: put Rx buffers after being done with current frame
ice: gather page_count()'s of each frag right before XDP prog call
ice: stop storing XDP verdict within ice_rx_buf
nvme: make nvme_tls_attrs_group static
nvme-fc: use ctrl state getter
net: bcmgenet: Correct overlaying of PHY and MAC Wake-on-LAN
ice: Add check for devm_kzalloc()
vmxnet3: Fix tx queue race condition with XDP
tg3: Disable tg3 PCIe AER on system reboot
udp: gso: do not drop small packets when PMTU reduces
drm/i915/dp: fix the Adaptive sync Operation mode for SDP
ethtool: rss: fix hiding unsupported fields in dumps
rxrpc: Fix the rxrpc_connection attend queue handling
gpio: pca953x: Improve interrupt support
net: atlantic: fix warning during hot unplug
net: rose: lock the socket in rose_bind()
gpio: sim: lock hog configfs items if present
x86/xen: fix xen_hypercall_hvm() to not clobber %rbx
x86/xen: add FRAME_END to xen_hypercall_hvm()
ACPI: property: Fix return value for nval == 0 in acpi_data_prop_read()
pfifo_tail_enqueue: Drop new packet when sch->limit == 0
netem: Update sch->q.qlen before qdisc_tree_reduce_backlog()
tun: revert fix group permission check
net: sched: Fix truncation of offloaded action statistics
rxrpc: Fix call state set to not include the SERVER_SECURING state
cpufreq: fix using cpufreq-dt as module
cpufreq: s3c64xx: Fix compilation warning
leds: lp8860: Write full EEPROM, not only half of it
ALSA: hda/realtek: Enable Mute LED on HP Laptop 14s-fq1xxx
cifs: Remove intermediate object of failed create SFU call
drm/modeset: Handle tiled displays in pan_display_atomic.
drm/client: Handle tiled displays better
smb: client: fix order of arguments of tracepoints
smb: client: change lease epoch type from unsigned int to __u16
md: reintroduce md-linear
s390/futex: Fix FUTEX_OP_ANDN implementation
arm64: Filter out SVE hwcaps when FEAT_SVE isn't implemented
m68k: vga: Fix I/O defines
fs/proc: do_task_stat: Fix ESP not readable during coredump
binfmt_flat: Fix integer overflow bug on 32 bit systems
accel/ivpu: Fix Qemu crash when running in passthrough
arm64/kvm: Configure HYP TCR.PS/DS based on host stage1
arm64/mm: Override PARange for !LPA2 and use it consistently
arm64/sme: Move storage of reg_smidr to __cpuinfo_store_cpu()
arm64/mm: Reduce PA space to 48 bits when LPA2 is not enabled
KVM: arm64: timer: Always evaluate the need for a soft timer
drm/rockchip: cdn-dp: Use drm_connector_helper_hpd_irq_event()
arm64: dts: rockchip: increase gmac rx_delay on rk3399-puma
remoteproc: omap: Handle ARM dma_iommu_mapping
KVM: Explicitly verify target vCPU is online in kvm_get_vcpu()
kvm: defer huge page recovery vhost task to later
KVM: s390: vsie: fix some corner-cases when grabbing vsie pages
ksmbd: fix integer overflows on 32 bit systems
drm/amd/display: Optimize cursor position updates
drm/amd/pm: Mark MM activity as unsupported
drm/amd/amdgpu: change the config of cgcg on gfx12
drm/amdkfd: only flush the validate MES contex
drm/amdkfd: Block per-queue reset when halt_if_hws_hang=1
Revert "drm/amd/display: Use HW lock mgr for PSR1"
drm/i915/guc: Debug print LRC state entries only if the context is pinned
drm/i915: Fix page cleanup on DMA remap failure
drm/komeda: Add check for komeda_get_layer_fourcc_list()
drm/xe/devcoredump: Move exec queue snapshot to Contexts section
drm/i915/dp: Iterate DSC BPP from high to low on all platforms
drm/i915: Drop 64bpp YUV formats from ICL+ SDR planes
drm/amdgpu: add a BO metadata flag to disable write compression for Vulkan
drm/amd/display: Fix seamless boot sequence
Bluetooth: L2CAP: handle NULL sock pointer in l2cap_sock_alloc
Bluetooth: L2CAP: accept zero as a special value for MTU auto-selection
KEYS: trusted: dcp: fix improper sg use with CONFIG_VMAP_STACK=y
clk: sunxi-ng: a100: enable MMC clock reparenting
clk: mmp2: call pm_genpd_init() only after genpd.name is set
media: i2c: ds90ub960: Fix UB9702 refclk register access
clk: clk-loongson2: Fix the number count of clk provider
clk: qcom: clk-alpha-pll: fix alpha mode configuration
clk: qcom: gcc-sm8550: Do not turn off PCIe GDSCs during gdsc_disable()
clk: qcom: gcc-sm8650: Do not turn off PCIe GDSCs during gdsc_disable()
clk: qcom: gcc-sm6350: Add missing parent_map for two clocks
clk: qcom: dispcc-sm6350: Add missing parent_map for a clock
clk: qcom: gcc-mdm9607: Fix cmd_rcgr offset for blsp1_uart6 rcg
clk: qcom: clk-rpmh: prevent integer overflow in recalc_rate
clk: mediatek: mt2701-vdec: fix conversion to mtk_clk_simple_probe
clk: mediatek: mt2701-aud: fix conversion to mtk_clk_simple_probe
clk: mediatek: mt2701-bdp: add missing dummy clk
clk: mediatek: mt2701-img: add missing dummy clk
clk: mediatek: mt2701-mm: add missing dummy clk
seccomp: passthrough uretprobe systemcall without filtering
blk-cgroup: Fix class @block_class's subsystem refcount leakage
efi: libstub: Use '-std=gnu11' to fix build with GCC 15
perf bench: Fix undefined behavior in cmpworker()
scsi: ufs: core: Fix the HIGH/LOW_TEMP Bit Definitions
of: Correct child specifier used as input of the 2nd nexus node
of: address: Fix empty resource handling in __of_address_resource_bounds()
of: Fix of_find_node_opts_by_path() handling of alias+path+options
of: reserved-memory: Fix using wrong number of cells to get property 'alignment'
Input: bbnsm_pwrkey - add remove hook
HID: hid-sensor-hub: don't use stale platform-data on remove
ring-buffer: Do not allow events in NMI with generic atomic64 cmpxchg()
atomic64: Use arch_spin_locks instead of raw_spin_locks
wifi: rtlwifi: rtl8821ae: Fix media status report
wifi: brcmfmac: fix NULL pointer dereference in brcmf_txfinalize()
wifi: mt76: mt7921u: Add VID/PID for TP-Link TXE50UH
wifi: rtw88: sdio: Fix disconnection after beacon loss
wifi: mt76: mt7915: add module param to select 5 GHz or 6 GHz on MT7916
wifi: rtw88: 8703b: Fix RX/TX issues
usb: gadget: f_tcm: Translate error to sense
usb: gadget: f_tcm: Decrement command ref count on cleanup
usb: gadget: f_tcm: ep_autoconfig with fullspeed endpoint
usb: gadget: f_tcm: Don't prepare BOT write request twice
usbnet: ipheth: fix possible overflow in DPE length check
usbnet: ipheth: use static NDP16 location in URB
usbnet: ipheth: check that DPE points past NCM header
usbnet: ipheth: refactor NCM datagram loop
usbnet: ipheth: break up NCM header size computation
usbnet: ipheth: fix DPE OoB read
usbnet: ipheth: document scope of NCM implementation
arm64: dts: qcom: x1e80100-asus-vivobook-s15: Fix USB QMP PHY supplies
arm64: dts: qcom: x1e80100-qcp: Fix USB QMP PHY supplies
arm64: dts: qcom: x1e78100-lenovo-thinkpad-t14s: Fix USB QMP PHY supplies
arm64: dts: qcom: x1e80100-crd: Fix USB QMP PHY supplies
arm64: dts: qcom: x1e80100-lenovo-yoga-slim7x: Fix USB QMP PHY supplies
arm64: dts: qcom: x1e80100-microsoft-romulus: Fix USB QMP PHY supplies
arm64: dts: qcom: x1e80100: Fix usb_2 controller interrupts
ASoC: acp: Support microphone from Lenovo Go S
soc: qcom: socinfo: Avoid out of bounds read of serial number
serial: sh-sci: Drop __initdata macro for port_cfg
serial: sh-sci: Do not probe the serial port if its slot in sci_ports[] is in use
MIPS: Loongson64: remove ROM Size unit in boardinfo
LoongArch: Extend the maximum number of watchpoints
powerpc/pseries/eeh: Fix get PE state translation
dm-crypt: don't update io->sector after kcryptd_crypt_write_io_submit()
dm-crypt: track tag_offset in convert_context
mips/math-emu: fix emulation of the prefx instruction
MIPS: pci-legacy: Override pci_address_to_pio
Revert "MIPS: csrc-r4k: Select HAVE_UNSTABLE_SCHED_CLOCK if SMP && 64BIT"
block: don't revert iter for -EIOCBQUEUED
Revert "media: uvcvideo: Require entities to have a non-zero unique ID"
firmware: qcom: scm: Fix missing read barrier in qcom_scm_is_available()
firmware: qcom: scm: Fix missing read barrier in qcom_scm_get_tzmem_pool()
ALSA: hda/realtek: Enable headset mic on Positivo C6400
ALSA: hda/realtek: Fix quirk matching for Legion Pro 7
ALSA: hda: Fix headset detection failure due to unstable sort
arm64: tegra: Fix Tegra234 PCIe interrupt-map
s390/pci: Fix SR-IOV for PFs initially in standby
PCI: Avoid putting some root ports into D3 on TUXEDO Sirius Gen1
PCI: endpoint: Finish virtual EP removal in pci_epf_remove_vepf()
PCI: dwc: ep: Write BAR_MASK before iATU registers in pci_epc_set_bar()
PCI: dwc: ep: Prevent changing BAR size/flags in pci_epc_set_bar()
nvme-pci: Add TUXEDO InfinityFlex to Samsung sleep quirk
nvme-pci: Add TUXEDO IBP Gen9 to Samsung sleep quirk
KVM: x86/mmu: Ensure NX huge page recovery thread is alive before waking
scsi: st: Don't set pos_unknown just after device recognition
scsi: qla2xxx: Move FCE Trace buffer allocation to user control
scsi: ufs: qcom: Fix crypto key eviction
scsi: ufs: core: Fix use-after free in init error and remove paths
scsi: storvsc: Set correct data length for sending SCSI command without payload
scsi: core: Do not retry I/Os during depopulation
kbuild: Move -Wenum-enum-conversion to W=2
rust: init: use explicit ABI to clean warning in future compilers
x86: rust: set rustc-abi=x86-softfloat on rustc>=1.86.0
x86/acpi: Fix LAPIC/x2APIC parsing order
x86/boot: Use '-std=gnu11' to fix build with GCC 15
ubi: Add a check for ubi_num
ARM: dts: dra7: Add bus_dma_limit for l4 cfg bus
ARM: dts: ti/omap: gta04: fix pm issues caused by spi module
arm64: dts: mediatek: mt8183: Disable DPI display output by default
arm64: dts: qcom: sdx75: Fix MPSS memory length
arm64: dts: qcom: x1e80100: Fix ADSP memory base and length
arm64: dts: qcom: x1e80100: Fix CDSP memory length
arm64: dts: qcom: sm6115: Fix MPSS memory length
arm64: dts: qcom: sm6115: Fix CDSP memory length
arm64: dts: qcom: sm6115: Fix ADSP memory base and length
arm64: dts: qcom: sm6350: Fix ADSP memory length
arm64: dts: qcom: sm6350: Fix MPSS memory length
arm64: dts: qcom: sm6350: Fix uart1 interconnect path
arm64: dts: qcom: sm6375: Fix ADSP memory length
arm64: dts: qcom: sm6375: Fix CDSP memory base and length
arm64: dts: qcom: sm6375: Fix MPSS memory base and length
arm64: dts: qcom: sm8350: Fix ADSP memory base and length
arm64: dts: qcom: sm8350: Fix CDSP memory base and length
arm64: dts: qcom: sm8350: Fix MPSS memory length
arm64: dts: qcom: sm8450: Fix ADSP memory base and length
arm64: dts: qcom: sm8450: Fix CDSP memory length
arm64: dts: qcom: sm8450: Fix MPSS memory length
arm64: dts: qcom: sm8550: Fix ADSP memory base and length
arm64: dts: qcom: sm8550: Fix CDSP memory length
arm64: dts: qcom: sm8550: Fix MPSS memory length
arm64: dts: qcom: sm8650: Fix ADSP memory base and length
arm64: dts: qcom: sm8650: Fix CDSP memory length
arm64: dts: qcom: sm8650: Fix MPSS memory length
arm64: dts: qcom: sm8550: correct MDSS interconnects
arm64: dts: qcom: sm8650: correct MDSS interconnects
crypto: qce - fix priority to be less than ARMv8 CE
arm64: tegra: Fix typo in Tegra234 dce-fabric compatible
arm64: tegra: Disable Tegra234 sce-fabric node
parisc: Temporarily disable jump label support
pwm: microchip-core: fix incorrect comparison with max period
xfs: don't call remap_verify_area with sb write protection held
xfs: Propagate errors from xfs_reflink_cancel_cow_range in xfs_dax_write_iomap_end
xfs: Add error handling for xfs_reflink_cancel_cow_range
accel/ivpu: Clear runtime_error after pm_runtime_resume_and_get() fails
ACPI: PRM: Remove unnecessary strict handler address checks
tpm: Change to kvalloc() in eventlog/acpi.c
rv: Reset per-task monitors also for idle tasks
hrtimers: Force migrate away hrtimers queued after CPUHP_AP_HRTIMERS_DYING
iommufd: Fix struct iommu_hwpt_pgfault init and padding
kfence: skip __GFP_THISNODE allocations on NUMA systems
media: ccs: Clean up parsed CCS static data on parse failure
mm/hugetlb: fix avoid_reserve to allow taking folio from subpool
iio: light: as73211: fix channel handling in only-color triggered buffer
iommu/tegra241-cmdqv: Read SMMU IDR1.CMDQS instead of hardcoding
iommufd/fault: Destroy response and mutex in iommufd_fault_destroy()
iommufd/fault: Use a separate spinlock to protect fault->deliver list
soc: samsung: exynos-pmu: Fix uninitialized ret in tensor_set_bits_atomic()
soc: mediatek: mtk-devapc: Fix leaking IO map on error paths
soc: mediatek: mtk-devapc: Fix leaking IO map on driver remove
soc: qcom: llcc: Enable LLCC_WRCACHE at boot on X1
soc: qcom: smem_state: fix missing of_node_put in error path
media: mmp: Bring back registration of the device
media: mc: fix endpoint iteration
media: nuvoton: Fix an error check in npcm_video_ece_init()
media: imx296: Add standby delay during probe
media: intel/ipu6: remove cpu latency qos request on error
media: ov5640: fix get_light_freq on auto
media: stm32: dcmipp: correct dma_set_mask_and_coherent mask value
media: ccs: Fix CCS static data parsing for large block sizes
media: ccs: Fix cleanup order in ccs_probe()
media: i2c: ds90ub9x3: Fix extra fwnode_handle_put()
media: i2c: ds90ub960: Fix use of non-existing registers on UB9702
media: i2c: ds90ub960: Fix UB9702 VC map
media: i2c: ds90ub960: Fix logging SP & EQ status only for UB9702
media: uvcvideo: Fix crash during unbind if gpio unit is in use
media: uvcvideo: Fix event flags in uvc_ctrl_send_events
media: uvcvideo: Support partial control reads
media: uvcvideo: Only save async fh if success
media: uvcvideo: Remove redundant NULL assignment
media: uvcvideo: Remove dangling pointers
mm: kmemleak: fix upper boundary check for physical address objects
mm: gup: fix infinite loop within __get_longterm_locked
mm/vmscan: accumulate nr_demoted for accurate demotion statistics
mm/hugetlb: fix hugepage allocation for interleaved memory nodes
mm/compaction: fix UBSAN shift-out-of-bounds warning
ata: libata-sff: Ensure that we cannot write outside the allocated buffer
irqchip/irq-mvebu-icu: Fix access to msi_data from irq_domain::host_data
crypto: qce - fix goto jump in error path
crypto: qce - unregister previously registered algos in error path
ceph: fix memory leak in ceph_mds_auth_match()
nvmem: qcom-spmi-sdam: Set size in struct nvmem_config
nvmem: core: improve range check for nvmem_cell_write()
nvmem: imx-ocotp-ele: simplify read beyond device check
nvmem: imx-ocotp-ele: fix MAC address byte order
nvmem: imx-ocotp-ele: fix reading from non zero offset
nvmem: imx-ocotp-ele: set word length to 1
io_uring: fix multishots with selected buffers
io_uring/net: don't retry connect operation on EPOLLERR
vfio/platform: check the bounds of read/write syscalls
selftests: mptcp: connect: -f: no reconnect
pnfs/flexfiles: retry getting layout segment for reads
ocfs2: fix incorrect CPU endianness conversion causing mount failure
ocfs2: handle a symlink read error correctly
nilfs2: fix possible int overflows in nilfs_fiemap()
nfs: Make NFS_FSCACHE select NETFS_SUPPORT instead of depending on it
NFSD: Encode COMPOUND operation status on page boundaries
mailbox: tegra-hsp: Clear mailbox before using message
mailbox: zynqmp: Remove invalid __percpu annotation in zynqmp_ipi_probe()
NFC: nci: Add bounds checking in nci_hci_create_pipe()
fgraph: Fix set_graph_notrace with setting TRACE_GRAPH_NOTRACE_BIT
i3c: master: Fix missing 'ret' assignment in set_speed()
irqchip/apple-aic: Only handle PMC interrupt as FIQ when configured so
mtd: onenand: Fix uninitialized retlen in do_otp_read()
misc: misc_minor_alloc to use ida for all dynamic/misc dynamic minors
misc: fastrpc: Deregister device nodes properly in error scenarios
misc: fastrpc: Fix registered buffer page address
misc: fastrpc: Fix copy buffer page size
net/ncsi: wait for the last response to Deselect Package before configuring channel
net: phy: c45-tjaxx: add delay between MDIO write and read in soft_reset
maple_tree: simplify split calculation
scripts/gdb: fix aarch64 userspace detection in get_current_task
tracing/osnoise: Fix resetting of tracepoints
rtla/osnoise: Distinguish missing workload option
rtla/timerlat_hist: Set OSNOISE_WORKLOAD for kernel threads
rtla/timerlat_top: Set OSNOISE_WORKLOAD for kernel threads
rtla: Add trace_instance_stop
rtla/timerlat_hist: Stop timerlat tracer on signal
rtla/timerlat_top: Stop timerlat tracer on signal
pinctrl: samsung: fix fwnode refcount cleanup if platform_get_irq_optional() fails
pinctrl: renesas: rzg2l: Fix PFC_MASK for RZ/V2H and RZ/G3E
ptp: Ensure info->enable callback is always set
RDMA/mlx5: Fix a race for an ODP MR which leads to CQE with error
rtc: zynqmp: Fix optional clock name property
timers/migration: Fix off-by-one root mis-connection
s390/fpu: Add fpc exception handler / remove fixup section again
MIPS: ftrace: Declare ftrace_get_parent_ra_addr() as static
xfs: avoid nested calls to __xfs_trans_commit
xfs: don't lose solo superblock counter update transactions
xfs: separate dquot buffer reads from xfs_dqflush
xfs: clean up log item accesses in xfs_qm_dqflush{,_done}
xfs: attach dquot buffer to dquot log item buffer
xfs: convert quotacheck to attach dquot buffers
xfs: release the dquot buf outside of qli_lock
xfs: lock dquot buffer before detaching dquot from b_li_list
xfs: fix mount hang during primary superblock recovery failure
spi: atmel-quadspi: Create `atmel_qspi_ops` to support newer SoC families
spi: atmel-qspi: Memory barriers after memory-mapped I/O
Revert "btrfs: avoid monopolizing a core when activating a swap file"
btrfs: avoid monopolizing a core when activating a swap file
mptcp: prevent excessive coalescing on receive
x86/mm: Convert unreachable() to BUG()
md/md-linear: Fix a NULL vs IS_ERR() bug in linear_add()
md: Fix linear_set_limits()
Revert "selftests/sched_ext: fix build after renames in sched_ext API"
Revert "drm/amd/display: Fix green screen issue after suspend"
drm/xe: Fix and re-enable xe_print_blob_ascii85()
fs: prepend statmount.mnt_opts string with security_sb_mnt_opts()
fs: fix adding security options to statmount.mnt_opt
statmount: let unset strings be empty
arm64: dts: rockchip: add reset-names for combphy on rk3568
ocfs2: check dir i_size in ocfs2_find_entry
Linux 6.12.14
Change-Id: Id4141bfc8ee9a6320b056561aa528228e7a3f1df
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
In some cases running with the test-ww_mutex code, I was seeing
odd behavior where sometimes it seemed flush_workqueue was
returning before all the work threads were finished.
Often this would cause strange crashes as the mutexes would be
freed while they were being used.
Looking at the code, there is a lifetime problem as the
controlling thread that spawns the work allocates the
"struct stress" structures that are passed to the workqueue
threads. Then when the workqueue threads are finished,
they free the stress struct that was passed to them.
Unfortunately the workqueue work_struct node is in the stress
struct. Which means the work_struct is freed before the work
thread returns and while flush_workqueue is waiting.
It seems like a better idea to have the controlling thread
both allocate and free the stress structures, so that we can
be sure we don't corrupt the workqueue by freeing the structure
prematurely.
So this patch reworks the test to do so, and with this change
I no longer see the early flush_workqueue returns.
Signed-off-by: John Stultz <jstultz@google.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230922043616.19282-3-jstultz@google.com
Booting w/ qemu without kvm, and with 64 cpus, I noticed we'd
sometimes hung task watchdog splats in get_random_u32_below()
when using the test-ww_mutex stress test.
While entropy exhaustion is no longer an issue, the RNG may be
slower early in boot. The test-ww_mutex code will spawn off
128 threads (2x cpus) and each thread will call
get_random_u32_below() a number of times to generate a random
order of the 16 locks.
This intense use takes time and without kvm, qemu can be slow
enough that we trip the hung task watchdogs.
For this test, we don't need true randomness, just mixed up
orders for testing ww_mutex lock acquisitions, so it changes
the logic to use the prng instead, which takes less time
and avoids the watchdgos.
Feedback would be appreciated!
Signed-off-by: John Stultz <jstultz@google.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230922043616.19282-2-jstultz@google.com
Rather than incurring a division or requesting too many random bytes for
the given range, use the prandom_u32_max() function, which only takes
the minimum required bytes from the RNG and avoids divisions. This was
done mechanically with this coccinelle script:
@basic@
expression E;
type T;
identifier get_random_u32 =~ "get_random_int|prandom_u32|get_random_u32";
typedef u64;
@@
(
- ((T)get_random_u32() % (E))
+ prandom_u32_max(E)
|
- ((T)get_random_u32() & ((E) - 1))
+ prandom_u32_max(E * XXX_MAKE_SURE_E_IS_POW2)
|
- ((u64)(E) * get_random_u32() >> 32)
+ prandom_u32_max(E)
|
- ((T)get_random_u32() & ~PAGE_MASK)
+ prandom_u32_max(PAGE_SIZE)
)
@multi_line@
identifier get_random_u32 =~ "get_random_int|prandom_u32|get_random_u32";
identifier RAND;
expression E;
@@
- RAND = get_random_u32();
... when != RAND
- RAND %= (E);
+ RAND = prandom_u32_max(E);
// Find a potential literal
@literal_mask@
expression LITERAL;
type T;
identifier get_random_u32 =~ "get_random_int|prandom_u32|get_random_u32";
position p;
@@
((T)get_random_u32()@p & (LITERAL))
// Add one to the literal.
@script:python add_one@
literal << literal_mask.LITERAL;
RESULT;
@@
value = None
if literal.startswith('0x'):
value = int(literal, 16)
elif literal[0] in '123456789':
value = int(literal, 10)
if value is None:
print("I don't know how to handle %s" % (literal))
cocci.include_match(False)
elif value == 2**32 - 1 or value == 2**31 - 1 or value == 2**24 - 1 or value == 2**16 - 1 or value == 2**8 - 1:
print("Skipping 0x%x for cleanup elsewhere" % (value))
cocci.include_match(False)
elif value & (value + 1) != 0:
print("Skipping 0x%x because it's not a power of two minus one" % (value))
cocci.include_match(False)
elif literal.startswith('0x'):
coccinelle.RESULT = cocci.make_expr("0x%x" % (value + 1))
else:
coccinelle.RESULT = cocci.make_expr("%d" % (value + 1))
// Replace the literal mask with the calculated result.
@plus_one@
expression literal_mask.LITERAL;
position literal_mask.p;
expression add_one.RESULT;
identifier FUNC;
@@
- (FUNC()@p & (LITERAL))
+ prandom_u32_max(RESULT)
@collapse_ret@
type T;
identifier VAR;
expression E;
@@
{
- T VAR;
- VAR = (E);
- return VAR;
+ return E;
}
@drop_var@
type T;
identifier VAR;
@@
{
- T VAR;
... when != VAR
}
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Yury Norov <yury.norov@gmail.com>
Reviewed-by: KP Singh <kpsingh@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz> # for ext4 and sbitmap
Reviewed-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com> # for drbd
Acked-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Heiko Carstens <hca@linux.ibm.com> # for s390
Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # for mmc
Acked-by: Darrick J. Wong <djwong@kernel.org> # for xfs
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Clang warns:
kernel/locking/test-ww_mutex.c:138:7: error: variable 'ret' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized]
if (!ww_mutex_trylock(&mutex, &ctx)) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/locking/test-ww_mutex.c:172:9: note: uninitialized use occurs here
return ret;
^~~
kernel/locking/test-ww_mutex.c:138:3: note: remove the 'if' if its condition is always false
if (!ww_mutex_trylock(&mutex, &ctx)) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/locking/test-ww_mutex.c:125:9: note: initialize the variable 'ret' to silence this warning
int ret;
^
= 0
1 error generated.
Assign !ww_mutex_trylock(...) to ret so that it is always initialized.
Fixes: 12235da8c8 ("kernel/locking: Add context to ww_mutex_trylock()")
Reported-by: "kernelci.org bot" <bot@kernelci.org>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Waiman Long <longman@redhat.com>
Link: https://lore.kernel.org/r/20210922145822.3935141-1-nathan@kernel.org
i915 will soon gain an eviction path that trylock a whole lot of locks
for eviction, getting dmesg failures like below:
BUG: MAX_LOCK_DEPTH too low!
turning off the locking correctness validator.
depth: 48 max: 48!
48 locks held by i915_selftest/5776:
#0: ffff888101a79240 (&dev->mutex){....}-{3:3}, at: __driver_attach+0x88/0x160
#1: ffffc900009778c0 (reservation_ww_class_acquire){+.+.}-{0:0}, at: i915_vma_pin.constprop.63+0x39/0x1b0 [i915]
#2: ffff88800cf74de8 (reservation_ww_class_mutex){+.+.}-{3:3}, at: i915_vma_pin.constprop.63+0x5f/0x1b0 [i915]
#3: ffff88810c7f9e38 (&vm->mutex/1){+.+.}-{3:3}, at: i915_vma_pin_ww+0x1c4/0x9d0 [i915]
#4: ffff88810bad5768 (reservation_ww_class_mutex){+.+.}-{3:3}, at: i915_gem_evict_something+0x110/0x860 [i915]
#5: ffff88810bad60e8 (reservation_ww_class_mutex){+.+.}-{3:3}, at: i915_gem_evict_something+0x110/0x860 [i915]
...
#46: ffff88811964d768 (reservation_ww_class_mutex){+.+.}-{3:3}, at: i915_gem_evict_something+0x110/0x860 [i915]
#47: ffff88811964e0e8 (reservation_ww_class_mutex){+.+.}-{3:3}, at: i915_gem_evict_something+0x110/0x860 [i915]
INFO: lockdep is turned off.
Fixing eviction to nest into ww_class_acquire is a high priority, but
it requires a rework of the entire driver, which can only be done one
step at a time.
As an intermediate solution, add an acquire context to
ww_mutex_trylock, which allows us to do proper nesting annotations on
the trylocks, making the above lockdep splat disappear.
This is also useful in regulator_lock_nested, which may avoid dropping
regulator_nesting_mutex in the uncontended path, so use it there.
TTM may be another user for this, where we could lock a buffer in a
fastpath with list locks held, without dropping all locks we hold.
[peterz: rework actual ww_mutex_trylock() implementations]
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/YUBGPdDDjKlxAuXJ@hirez.programming.kicks-ass.net
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version this program is distributed in the
hope that it will be useful but without any warranty without even
the implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details you
should have received a copy of the gnu general public license along
with this program if not you can access it online at http www gnu
org licenses gpl 2 0 html
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 1 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com>
Reviewed-by: Steve Winslow <swinslow@gmail.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190519154041.430943677@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If CONFIG_WW_MUTEX_SELFTEST=y is enabled, booting an image
in an arm64 virtual machine results in the following
traceback if 8 CPUs are enabled:
DEBUG_LOCKS_WARN_ON(__owner_task(owner) != current)
WARNING: CPU: 2 PID: 537 at kernel/locking/mutex.c:1033 __mutex_unlock_slowpath+0x1a8/0x2e0
...
Call trace:
__mutex_unlock_slowpath()
ww_mutex_unlock()
test_cycle_work()
process_one_work()
worker_thread()
kthread()
ret_from_fork()
If requesting b_mutex fails with -EDEADLK, the error variable
is reassigned to the return value from calling ww_mutex_lock
on a_mutex again. If this call fails, a_mutex is not locked.
It is, however, unconditionally unlocked subsequently, causing
the reported warning. Fix the problem by using two error variables.
With this change, the selftest still fails as follows:
cyclic deadlock not resolved, ret[7/8] = -35
However, the traceback is gone.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Fixes: d1b42b800e ("locking/ww_mutex: Add kselftests for resolving ww_mutex cyclic deadlocks")
Link: http://lkml.kernel.org/r/1538516929-9734-1-git-send-email-linux@roeck-us.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
The current Wound-Wait mutex algorithm is actually not Wound-Wait but
Wait-Die. Implement also Wound-Wait as a per-ww-class choice. Wound-Wait
is, contrary to Wait-Die a preemptive algorithm and is known to generate
fewer backoffs. Testing reveals that this is true if the
number of simultaneous contending transactions is small.
As the number of simultaneous contending threads increases, Wait-Wound
becomes inferior to Wait-Die in terms of elapsed time.
Possibly due to the larger number of held locks of sleeping transactions.
Update documentation and callers.
Timings using git://people.freedesktop.org/~thomash/ww_mutex_test
tag patch-18-06-15
Each thread runs 100000 batches of lock / unlock 800 ww mutexes randomly
chosen out of 100000. Four core Intel x86_64:
Algorithm #threads Rollbacks time
Wound-Wait 4 ~100 ~17s.
Wait-Die 4 ~150000 ~19s.
Wound-Wait 16 ~360000 ~109s.
Wait-Die 16 ~450000 ~82s.
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Gustavo Padovan <gustavo@padovan.org>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-doc@vger.kernel.org
Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
Co-authored-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
GFP_TEMPORARY was introduced by commit e12ba74d8f ("Group short-lived
and reclaimable kernel allocations") along with __GFP_RECLAIMABLE. It's
primary motivation was to allow users to tell that an allocation is
short lived and so the allocator can try to place such allocations close
together and prevent long term fragmentation. As much as this sounds
like a reasonable semantic it becomes much less clear when to use the
highlevel GFP_TEMPORARY allocation flag. How long is temporary? Can the
context holding that memory sleep? Can it take locks? It seems there is
no good answer for those questions.
The current implementation of GFP_TEMPORARY is basically GFP_KERNEL |
__GFP_RECLAIMABLE which in itself is tricky because basically none of
the existing caller provide a way to reclaim the allocated memory. So
this is rather misleading and hard to evaluate for any benefits.
I have checked some random users and none of them has added the flag
with a specific justification. I suspect most of them just copied from
other existing users and others just thought it might be a good idea to
use without any measuring. This suggests that GFP_TEMPORARY just
motivates for cargo cult usage without any reasoning.
I believe that our gfp flags are quite complex already and especially
those with highlevel semantic should be clearly defined to prevent from
confusion and abuse. Therefore I propose dropping GFP_TEMPORARY and
replace all existing users to simply use GFP_KERNEL. Please note that
SLAB users with shrinkers will still get __GFP_RECLAIMABLE heuristic and
so they will be placed properly for memory fragmentation prevention.
I can see reasons we might want some gfp flag to reflect shorterm
allocations but I propose starting from a clear semantic definition and
only then add users with proper justification.
This was been brought up before LSF this year by Matthew [1] and it
turned out that GFP_TEMPORARY really doesn't have a clear semantic. It
seems to be a heuristic without any measured advantage for most (if not
all) its current users. The follow up discussion has revealed that
opinions on what might be temporary allocation differ a lot between
developers. So rather than trying to tweak existing users into a
semantic which they haven't expected I propose to simply remove the flag
and start from scratch if we really need a semantic for short term
allocations.
[1] http://lkml.kernel.org/r/20170118054945.GD18349@bombadil.infradead.org
[akpm@linux-foundation.org: fix typo]
[akpm@linux-foundation.org: coding-style fixes]
[sfr@canb.auug.org.au: drm/i915: fix up]
Link: http://lkml.kernel.org/r/20170816144703.378d4f4d@canb.auug.org.au
Link: http://lkml.kernel.org/r/20170728091904.14627-1-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Mel Gorman <mgorman@suse.de>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Neil Brown <neilb@suse.de>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Greg Kroah-Hartman
Thorsten Blum
John Stultz
Jeff Johnson
Boqun Feng
Jason A. Donenfeld
Nathan Chancellor
Maarten Lankhorst
Thomas Gleixner
Guenter Roeck
Colin Ian King
Thomas Hellstrom
Michal Hocko
Chris Wilson
Peter Zijlstra