memory core dump because of startup using pmem as mem mode on AEP

qemu-system-x86_64 -s -M pc,accel=kvm,nvdimm -kernel ./build/arch/x86_64/boot/bzImage -nographic -append "console=ttyS0" -initrd ../initramfs/initramfs-busybox-x86_64.cpio.gz

[    0.000000][    T0] Linux version 5.12.0-rc3+ ([email protected]) (gcc (GCC) 8.3.1 20191121 (Red Hat 8.3.1-5), GNU ld version 2.30-79.el8) #1 SMP Thu Mar 18 18:36:36 CST 2021
[    0.000000][    T0] Command line: console=ttyS0
[    0.000000][    T0] x86/fpu: x87 FPU will use FXSAVE
[    0.000000][    T0] BIOS-provided physical RAM map:
[    0.000000][    T0] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
[    0.000000][    T0] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
[    0.000000][    T0] BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
[    0.000000][    T0] BIOS-e820: [mem 0x0000000000100000-0x0000000007fdffff] usable
[    0.000000][    T0] BIOS-e820: [mem 0x0000000007fe0000-0x0000000007ffffff] reserved
[    0.000000][    T0] BIOS-e820: [mem 0x00000000feffc000-0x00000000feffffff] reserved
[    0.000000][    T0] BIOS-e820: [mem 0x00000000fffc0000-0x00000000ffffffff] reserved
[    0.000000][    T0] NX (Execute Disable) protection: active
[    0.000000][    T0] SMBIOS 2.8 present.
[    0.000000][    T0] DMI: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[    0.000000][    T0] tsc: Fast TSC calibration using PIT
[    0.000000][    T0] tsc: Detected 2600.179 MHz processor
[    0.001604][    T0] last_pfn = 0x7fe0 max_arch_pfn = 0x400000000
[    0.001639][    T0] x86/PAT: PAT not supported by the CPU.
[    0.001648][    T0] x86/PAT: Configuration [0-7]: WB  WT  UC- UC  WB  WT  UC- UC
[    0.009638][    T0] found SMP MP-table at [mem 0x000f5ab0-0x000f5abf]
[    0.009698][    T0] check: Scanning 1 areas for low memory corruption
[    0.011523][    T0] RAMDISK: [mem 0x07ef9000-0x07fdffff]
[    0.011541][    T0] ACPI: Early table checksum verification disabled
[    0.011557][    T0] ACPI: RSDP 0x00000000000F58D0 000014 (v00 BOCHS )
[    0.011566][    T0] ACPI: RSDT 0x0000000007FE1564 000034 (v01 BOCHS  BXPCRSDT 00000001 BXPC 00000001)
[    0.011579][    T0] ACPI: FACP 0x0000000007FE1418 000074 (v01 BOCHS  BXPCFACP 00000001 BXPC 00000001)
[    0.011592][    T0] ACPI: DSDT 0x0000000007FE0040 0013D8 (v01 BOCHS  BXPCDSDT 00000001 BXPC 00000001)
[    0.011601][    T0] ACPI: FACS 0x0000000007FE0000 000040
[    0.011609][    T0] ACPI: APIC 0x0000000007FE148C 000078 (v01 BOCHS  BXPCAPIC 00000001 BXPC 00000001)
[    0.011618][    T0] ACPI: HPET 0x0000000007FE1504 000038 (v01 BOCHS  BXPCHPET 00000001 BXPC 00000001)
[    0.011627][    T0] ACPI: WAET 0x0000000007FE153C 000028 (v01 BOCHS  BXPCWAET 00000001 BXPC 00000001)
[    0.012175][    T0] No NUMA configuration found
[    0.012181][    T0] Faking a node at [mem 0x0000000000000000-0x0000000007fdffff]
[    0.012198][    T0] NODE_DATA(0) allocated [mem 0x07ef5000-0x07ef8fff]
[    0.012735][    T0] Zone ranges:
[    0.012741][    T0]   DMA      [mem 0x0000000000001000-0x0000000000ffffff]
[    0.012747][    T0]   DMA32    [mem 0x0000000001000000-0x0000000007fdffff]
[    0.012751][    T0]   Normal   empty
[    0.012755][    T0] Movable zone start for each node
[    0.012758][    T0] Early memory node ranges
[    0.012761][    T0]   node   0: [mem 0x0000000000001000-0x000000000009efff]
[    0.012766][    T0]   node   0: [mem 0x0000000000100000-0x0000000007fdffff]
[    0.012771][    T0] Initmem setup node 0 [mem 0x0000000000001000-0x0000000007fdffff]
[    0.015616][    T0]   DMA zone: 28770 pages in unavailable ranges
[    0.017312][    T0]   DMA32 zone: 32 pages in unavailable ranges
[    0.026940][    T0] kasan: KernelAddressSanitizer initialized
[    0.027186][    T0] ACPI: PM-Timer IO Port: 0x608
[    0.027201][    T0] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
[    0.027239][    T0] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
[    0.027247][    T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[    0.027252][    T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
[    0.027256][    T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[    0.027264][    T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
[    0.027269][    T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
[    0.027286][    T0] Using ACPI (MADT) for SMP configuration information
[    0.027290][    T0] ACPI: HPET id: 0x8086a201 base: 0xfed00000
[    0.027300][    T0] smpboot: Allowing 1 CPUs, 0 hotplug CPUs
[    0.027336][    T0] PM: hibernation: Registered nosave memory: [mem 0x00000000-0x00000fff]
[    0.027343][    T0] PM: hibernation: Registered nosave memory: [mem 0x0009f000-0x0009ffff]
[    0.027346][    T0] PM: hibernation: Registered nosave memory: [mem 0x000a0000-0x000effff]
[    0.027350][    T0] PM: hibernation: Registered nosave memory: [mem 0x000f0000-0x000fffff]
[    0.027356][    T0] [mem 0x08000000-0xfeffbfff] available for PCI devices
[    0.027365][    T0] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1910969940391419 ns
[    0.039488][    T0] setup_percpu: NR_CPUS:64 nr_cpumask_bits:64 nr_cpu_ids:1 nr_node_ids:1
[    0.040176][    T0] percpu: Embedded 60 pages/cpu s207640 r8192 d29928 u2097152
[    0.040295][    T0] Built 1 zonelists, mobility grouping on.  Total pages: 32105
[    0.040300][    T0] Policy zone: DMA32
[    0.040304][    T0] Kernel command line: console=ttyS0
[    0.040408][    T0] Dentry cache hash table entries: 16384 (order: 5, 131072 bytes, linear)
[    0.040427][    T0] Inode-cache hash table entries: 8192 (order: 4, 65536 bytes, linear)
[    0.040765][    T0] mem auto-init: stack:off, heap alloc:off, heap free:off
[    0.049354][    T0] Memory: 33328K/130552K available (22542K kernel code, 8150K rwdata, 7336K rodata, 1592K init, 7944K bss, 96968K reserved, 0K cma-reserved)
[    0.050469][    T0] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.050475][    T0] kmemleak: Kernel memory leak detector disabled
[    0.053361][    T0] ODEBUG: selftest passed
[    0.053398][    T0] Kernel/User page tables isolation: enabled
[    0.056143][    T0] rcu: Hierarchical RCU implementation.
[    0.056147][    T0] rcu:     RCU event tracing is enabled.
[    0.056150][    T0] rcu:     RCU restricting CPUs from NR_CPUS=64 to nr_cpu_ids=1.
[    0.056154][    T0] rcu:     RCU callback double-/use-after-free debug enabled.
[    0.056161][    T0] rcu: RCU calculated value of scheduler-enlistment delay is 100 jiffies.
[    0.056164][    T0] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1
[    0.090495][    T0] NR_IRQS: 4352, nr_irqs: 256, preallocated irqs: 16
[    0.091055][    T0] kfence: initialized - using 2097152 bytes for 255 objects at 0x(____ptrval____)-0x(____ptrval____)
[    0.091137][    T0] random: get_random_bytes called from start_kernel+0x1d6/0x394 with crng_init=0
[    0.094413][    T0] Console: colour VGA+ 80x25
[    0.148734][    T0] printk: console [ttyS0] enabled
[    0.149246][    T0] ACPI: Core revision 20210105
[    0.150207][    T0] clocksource: hpet: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604467 ns
[    0.151197][    T0] APIC: Switch to symmetric I/O mode setup
[    0.153304][    T0] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[    0.158164][    T0] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x257ae5433b3, max_idle_ns: 440795258831 ns
[    0.159203][    T0] Calibrating delay loop (skipped), value calculated using timer frequency.. 5200.35 BogoMIPS (lpj=2600179)
[    0.160204][    T0] pid_max: default: 32768 minimum: 301
[    0.160887][    T0] LSM: Security Framework initializing
[    0.161284][    T0] SELinux:  Initializing.
[    0.161945][    T0] Mount-cache hash table entries: 512 (order: 0, 4096 bytes, linear)
[    0.162205][    T0] Mountpoint-cache hash table entries: 512 (order: 0, 4096 bytes, linear)
[    0.165776][    T0] Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0
[    0.166205][    T0] Last level dTLB entries: 4KB 0, 2MB 0, 4MB 0, 1GB 0
[    0.166807][    T0] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
[    0.167202][    T0] Spectre V2 : Mitigation: Full generic retpoline
[    0.168201][    T0] Spectre V2 : Spectre v2 / SpectreRSB mitigation: Filling RSB on context switch
[    0.169201][    T0] Speculative Store Bypass: Vulnerable
[    0.169685][    T0] MDS: Vulnerable: Clear CPU buffers attempted, no microcode
[    0.182755][    T0] debug: unmapping init [mem 0xffffffff93633000-0xffffffff9363cfff]
[    0.285865][    T1] smpboot: CPU0: Intel QEMU Virtual CPU version 2.5+ (family: 0x6, model: 0x6, stepping: 0x3)
[    0.287415][    T1] Performance Events: PMU not available due to virtualization, using software events only.
[    0.288371][    T1] rcu: Hierarchical SRCU implementation.
[    0.293391][    T1] smp: Bringing up secondary CPUs ...
[    0.293874][    T1] smp: Brought up 1 node, 1 CPU
[    0.294203][    T1] smpboot: Max logical packages: 1
[    0.294657][    T1] smpboot: Total of 1 processors activated (5200.35 BogoMIPS)
[    0.296333][    T1] devtmpfs: initialized
[    0.310055][    T1] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275000 ns
[    0.310207][    T1] futex hash table entries: 256 (order: 2, 16384 bytes, linear)
[    0.311605][    T1] PM: RTC time: 21:08:42, date: 2021-03-18
[    0.313572][    T1] NET: Registered protocol family 16
[    0.315826][    T1] audit: initializing netlink subsys (disabled)
[    0.318502][    T1] thermal_sys: Registered thermal governor 'step_wise'
[    0.318505][    T1] thermal_sys: Registered thermal governor 'user_space'
[    0.319221][    T1] cpuidle: using governor menu
[    0.320242][   T17] audit: type=2000 audit(1616101722.164:1): state=initialized audit_enabled=0 res=1
[    0.321321][    T1] ACPI: bus type PCI registered
[    0.322582][    T1] PCI: Using configuration type 1 for base access
[    0.397427][    T1] Kprobes globally optimized
[    0.398504][    T1] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages
[    0.399621][   T21] cryptomgr_test (21) used greatest stack depth: 30688 bytes left
[    0.400938][   T26] cryptomgr_test (26) used greatest stack depth: 30464 bytes left
[    0.404879][    T1] ACPI: Added _OSI(Module Device)
[    0.405454][    T1] ACPI: Added _OSI(Processor Device)
[    0.405938][    T1] ACPI: Added _OSI(3.0 _SCP Extensions)
[    0.406202][    T1] ACPI: Added _OSI(Processor Aggregator Device)
[    0.406773][    T1] ACPI: Added _OSI(Linux-Dell-Video)
[    0.407224][    T1] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
[    0.407770][    T1] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics)
[    0.468972][    T1] ACPI: 1 ACPI AML tables successfully acquired and loaded
[    0.478573][    T1] ACPI: Interpreter enabled
[    0.479167][    T1] ACPI: (supports S0 S3 S4 S5)
[    0.479202][    T1] ACPI: Using IOAPIC for interrupt routing
[    0.480317][    T1] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[    0.483927][    T1] ACPI: Enabled 3 GPEs in block 00 to 0F
[    0.581187][    T1] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[    0.582299][    T1] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI HPX-Type3]
[    0.583501][    T1] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.
[    0.594945][    T1] PCI host bridge to bus 0000:00
[    0.595217][    T1] pci_bus 0000:00: root bus resource [io  0x0000-0x0cf7 window]
[    0.595891][    T1] pci_bus 0000:00: root bus resource [io  0x0d00-0xffff window]
[    0.596213][    T1] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
[    0.597216][    T1] pci_bus 0000:00: root bus resource [mem 0x08000000-0xfebfffff window]
[    0.598213][    T1] pci_bus 0000:00: root bus resource [mem 0x100000000-0x17fffffff window]
[    0.598967][    T1] pci_bus 0000:00: root bus resource [bus 00-ff]
[    0.599417][    T1] pci 0000:00:00.0: [8086:1237] type 00 class 0x060000
[    0.603996][    T1] pci 0000:00:01.0: [8086:7000] type 00 class 0x060100
[    0.608062][    T1] pci 0000:00:01.1: [8086:7010] type 00 class 0x010180
[    0.610376][    T1] pci 0000:00:01.1: reg 0x20: [io  0xc040-0xc04f]
[    0.611558][    T1] pci 0000:00:01.1: legacy IDE quirk: reg 0x10: [io  0x01f0-0x01f7]
[    0.612203][    T1] pci 0000:00:01.1: legacy IDE quirk: reg 0x14: [io  0x03f6]
[    0.612834][    T1] pci 0000:00:01.1: legacy IDE quirk: reg 0x18: [io  0x0170-0x0177]
[    0.613202][    T1] pci 0000:00:01.1: legacy IDE quirk: reg 0x1c: [io  0x0376]
[    0.616949][    T1] pci 0000:00:01.3: [8086:7113] type 00 class 0x068000
[    0.617559][    T1] pci 0000:00:01.3: quirk: [io  0x0600-0x063f] claimed by PIIX4 ACPI
[    0.618208][    T1] pci 0000:00:01.3: quirk: [io  0x0700-0x070f] claimed by PIIX4 SMB
[    0.622369][    T1] pci 0000:00:02.0: [1234:1111] type 00 class 0x030000
[    0.623527][    T1] pci 0000:00:02.0: reg 0x10: [mem 0xfd000000-0xfdffffff pref]
[    0.625766][    T1] pci 0000:00:02.0: reg 0x18: [mem 0xfebf0000-0xfebf0fff]
[    0.629793][    T1] pci 0000:00:02.0: reg 0x30: [mem 0xfebe0000-0xfebeffff pref]
[    0.634280][    T1] pci 0000:00:03.0: [8086:100e] type 00 class 0x020000
[    0.635472][    T1] pci 0000:00:03.0: reg 0x10: [mem 0xfebc0000-0xfebdffff]
[    0.636471][    T1] pci 0000:00:03.0: reg 0x14: [io  0xc000-0xc03f]
[    0.640524][    T1] pci 0000:00:03.0: reg 0x30: [mem 0xfeb80000-0xfebbffff pref]
[    0.653084][    T1] ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11)
[    0.656265][    T1] ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
[    0.659434][    T1] ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
[    0.662581][    T1] ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11)
[    0.664165][    T1] ACPI: PCI Interrupt Link [LNKS] (IRQs *9)
[    0.676501][    T1] iommu: Default domain type: Translated
[    0.677439][    T1] pci 0000:00:02.0: vgaarb: setting as boot VGA device
[    0.678060][    T1] pci 0000:00:02.0: vgaarb: VGA device added: decodes=io+mem,owns=io+mem,locks=none
[    0.678203][    T1] pci 0000:00:02.0: vgaarb: bridge control possible
[    0.679202][    T1] vgaarb: loaded
[    0.682697][    T1] SCSI subsystem initialized
[    0.684084][    T1] ACPI: bus type USB registered
[    0.684537][    T1] usbcore: registered new interface driver usbfs
[    0.685373][    T1] usbcore: registered new interface driver hub
[    0.686224][    T1] usbcore: registered new device driver usb
[    0.687125][    T1] pps_core: LinuxPPS API ver. 1 registered
[    0.687202][    T1] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <[email protected]>
[    0.688286][    T1] PTP clock support registered
[    0.690383][    T1] Advanced Linux Sound Architecture Driver Initialized.
[    0.693545][    T1] NetLabel: Initializing
[    0.693937][    T1] NetLabel:  domain hash size = 128
[    0.694202][    T1] NetLabel:  protocols = UNLABELED CIPSOv4 CALIPSO
[    0.695290][    T1] NetLabel:  unlabeled traffic allowed by default
[    0.696251][    T1] PCI: Using ACPI for IRQ routing
[    0.697000][    T1] hpet: 3 channels of 0 reserved for per-cpu timers
[    0.697223][    T1] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0
[    0.697722][    T1] hpet0: 3 comparators, 64-bit 100.000000 MHz counter
[    0.702274][    T1] clocksource: Switched to clocksource tsc-early
[    0.963193][    T1] VFS: Disk quotas dquot_6.6.0
[    1.264038][    T1] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[    1.268139][    T1] pnp: PnP ACPI init
[    1.283315][    T1] pnp: PnP ACPI: found 6 devices
[    1.317444][    T1] clocksource: acpi_pm: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 2085701024 ns
[    1.318571][    T1] NET: Registered protocol family 2
[    1.321405][    T1] tcp_listen_portaddr_hash hash table entries: 256 (order: 0, 4096 bytes, linear)
[    1.322297][    T1] TCP established hash table entries: 1024 (order: 1, 8192 bytes, linear)
[    1.323055][    T1] TCP bind hash table entries: 1024 (order: 2, 16384 bytes, linear)
[    1.323755][    T1] TCP: Hash tables configured (established 1024 bind 1024)
[    1.324571][    T1] UDP hash table entries: 256 (order: 1, 8192 bytes, linear)
[    1.325229][    T1] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear)
[    1.326349][    T1] NET: Registered protocol family 1
[    1.327970][    T1] RPC: Registered named UNIX socket transport module.
[    1.328570][    T1] RPC: Registered udp transport module.
[    1.329048][    T1] RPC: Registered tcp transport module.
[    1.329536][    T1] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    1.331648][    T1] pci_bus 0000:00: resource 4 [io  0x0000-0x0cf7 window]
[    1.332267][    T1] pci_bus 0000:00: resource 5 [io  0x0d00-0xffff window]
[    1.332875][    T1] pci_bus 0000:00: resource 6 [mem 0x000a0000-0x000bffff window]
[    1.333550][    T1] pci_bus 0000:00: resource 7 [mem 0x08000000-0xfebfffff window]
[    1.334228][    T1] pci_bus 0000:00: resource 8 [mem 0x100000000-0x17fffffff window]
[    1.335600][    T1] pci 0000:00:01.0: PIIX3: Enabling Passive Release
[    1.336179][    T1] pci 0000:00:00.0: Limiting direct PCI/PCI transfers
[    1.336816][    T1] pci 0000:00:01.0: Activating ISA DMA hang workarounds
[    1.337574][    T1] pci 0000:00:02.0: Video device with shadowed ROM at [mem 0x000c0000-0x000dffff]
[    1.338414][    T1] PCI: CLS 0 bytes, default 64
[    1.339449][    T1] Unpacking initramfs...
[    1.342529][    T1] swapper/0 invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0
[    1.343507][    T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.12.0-rc3+ #1
[    1.344134][    T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[    1.344469][    T1] Call Trace:
[    1.344469][    T1]  dump_stack+0x89/0xb4
[    1.344469][    T1]  dump_header+0x81/0x51e
[    1.344469][    T1]  ? task_will_free_mem+0x1d/0x260
[    1.344469][    T1]  ? blocking_notifier_call_chain+0x23/0xb0
[    1.344469][    T1]  out_of_memory.cold.45+0x41/0xb2
[    1.344469][    T1]  ? oom_killer_disable+0x200/0x200
[    1.344469][    T1]  ? __zone_watermark_ok+0x72/0x1c0
[    1.344469][    T1]  __alloc_pages_slowpath.constprop.122+0xfff/0x10e0
[    1.344469][    T1]  ? warn_alloc+0x120/0x120
[    1.344469][    T1]  ? shmem_reserve_inode+0x1e1/0x210
[    1.344469][    T1]  ? shmem_mknod+0x39/0x110
[    1.344469][    T1]  ? kasan_unpoison+0x38/0x60
[    1.344469][    T1]  __alloc_pages_nodemask+0x3d1/0x400
[    1.344469][    T1]  ? __alloc_pages_slowpath.constprop.122+0x10e0/0x10e0
[    1.344469][    T1]  ? find_first_bit+0x19/0x70
[    1.344469][    T1]  ? offset_il_node+0x4b/0x90
[    1.344469][    T1]  alloc_page_interleave+0xd/0xc0
[    1.344469][    T1]  shmem_alloc_page+0xe7/0x160
[    1.344469][    T1]  ? shmem_free_swap+0x60/0x60
[    1.344469][    T1]  ? percpu_counter_add_batch+0x1f/0xa0
[    1.344469][    T1]  ? percpu_counter_add_batch+0x1f/0xa0
[    1.344469][    T1]  shmem_getpage_gfp.isra.74+0x223/0xd90
[    1.344469][    T1]  ? shmem_swapin_page+0xbf0/0xbf0
[    1.344469][    T1]  ? iov_iter_advance+0xe1/0x650
[    1.344469][    T1]  ? shmem_write_end+0xe0/0x3b0
[    1.344469][    T1]  generic_perform_write+0x1da/0x2e0
[    1.344469][    T1]  ? page_cache_next_miss+0x170/0x170
[    1.344469][    T1]  ? __mnt_drop_write_file+0xd/0x40
[    1.344469][    T1]  ? file_update_time+0x19d/0x210
[    1.344469][    T1]  ? update_time+0x60/0x60
[    1.344469][    T1]  ? generic_write_checks+0x10f/0x1a0
[    1.344469][    T1]  __generic_file_write_iter+0x18c/0x280
[    1.344469][    T1]  generic_file_write_iter+0x72/0xe0
[    1.344469][    T1]  __kernel_write+0x295/0x540
[    1.344469][    T1]  ? do_iter_readv_writev+0x330/0x330
[    1.344469][    T1]  ? preempt_schedule_common+0x29/0x40
[    1.344469][    T1]  ? __cond_resched+0x18/0x20
[    1.344469][    T1]  ? __inode_security_revalidate+0x68/0x80
[    1.344469][    T1]  kernel_write+0x70/0x170
[    1.344469][    T1]  xwrite.constprop.3+0x30/0x63
[    1.344469][    T1]  do_copy+0xf9/0x158
[    1.344469][    T1]  ? xwrite.constprop.3+0x63/0x63
[    1.344469][    T1]  write_buffer+0x30/0x41
[    1.344469][    T1]  flush_buffer+0x33/0x9a
[    1.344469][    T1]  ? initrd_load+0x3a/0x3a
[    1.344469][    T1]  __gunzip+0x366/0x447
[    1.344469][    T1]  ? write_buffer+0x41/0x41
[    1.344469][    T1]  ? bunzip2+0x579/0x579
[    1.344469][    T1]  ? initrd_load+0x3a/0x3a
[    1.344469][    T1]  ? __gunzip+0x447/0x447
[    1.344469][    T1]  gunzip+0xe/0x11
[    1.344469][    T1]  ? initrd_load+0x3a/0x3a
[    1.344469][    T1]  unpack_to_rootfs+0x1e4/0x3a7
[    1.344469][    T1]  ? initrd_load+0x3a/0x3a
[    1.344469][    T1]  ? retain_initrd_param+0x21/0x21
[    1.344469][    T1]  ? wake_up_q+0xd0/0xd0
[    1.344469][    T1]  ? _raw_spin_unlock_irqrestore+0xd/0x20
[    1.344469][    T1]  ? reserve_initrd_mem+0x197/0x197
[    1.344469][    T1]  populate_rootfs+0x92/0x1b0
[    1.344469][    T1]  ? reserve_initrd_mem+0x197/0x197
[    1.344469][    T1]  do_one_initcall+0x84/0x270
[    1.344469][    T1]  ? trace_event_raw_event_initcall_finish+0x130/0x130
[    1.344469][    T1]  ? __wake_up_common+0x200/0x200
[    1.344469][    T1]  ? __kasan_kmalloc+0x97/0xc0
[    1.344469][    T1]  ? __kmalloc+0x153/0x300
[    1.344469][    T1]  kernel_init_freeable+0x27d/0x2d0
[    1.344469][    T1]  ? rest_init+0xb5/0xb5
[    1.344469][    T1]  kernel_init+0x7/0x11b
[    1.344469][    T1]  ? rest_init+0xb5/0xb5
[    1.344469][    T1]  ret_from_fork+0x22/0x30
[    1.375643][    T1] Mem-Info:
[    1.375910][    T1] active_anon:0 inactive_anon:12 isolated_anon:0
[    1.375910][    T1]  active_file:0 inactive_file:0 isolated_file:0
[    1.375910][    T1]  unevictable:0 dirty:0 writeback:0
[    1.375910][    T1]  slab_reclaimable:3200 slab_unreclaimable:3636
[    1.375910][    T1]  mapped:0 shmem:24 pagetables:3 bounce:0
[    1.375910][    T1]  free:962 free_pcp:0 free_cma:0
[    1.378880][    T1] Node 0 active_anon:0kB inactive_anon:48kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:96kB writeback_tmp:0kB kernel_o
[    1.381005][    T1] Node 0 DMA free:1420kB min:2392kB low:2476kB high:2560kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB manB
[    1.383306][    T1] lowmem_reserve[]: 0 17 17 17
[    1.383729][    T1] Node 0 DMA32 free:2428kB min:2432kB low:2528kB high:2624kB reserved_highatomic:0KB active_anon:0kB inactive_anon:48kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:114560kBB
[    1.386036][    T1] lowmem_reserve[]: 0 0 0 0
[    1.386441][    T1] Node 0 DMA: 2*4kB (ME) 2*8kB (UM) 1*16kB (U) 1*32kB (U) 1*64kB (U) 2*128kB (UM) 2*256kB (UM) 1*512kB (M) 0*1024kB 0*2048kB 0*4096kB = 1416kB
[    1.387725][    T1] Node 0 DMA32: 3*4kB (UE) 0*8kB 1*16kB (M) 3*32kB (UME) 2*64kB (UM) 1*128kB (M) 0*256kB 4*512kB (UME) 0*1024kB 0*2048kB 0*4096kB = 2428kB
[    1.388981][    T1] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
[    1.389789][    T1] 24 total pagecache pages
[    1.390171][    T1] 0 pages in swap cache
[    1.390537][    T1] Swap cache stats: add 0, delete 0, find 0/0
[    1.391059][    T1] Free swap  = 0kB
[    1.391387][    T1] Total swap = 0kB
[    1.391712][    T1] 32638 pages RAM
[    1.392021][    T1] 0 pages HighMem/MovableOnly
[    1.392432][    T1] 24242 pages reserved
[    1.392783][    T1] Unreclaimable slab info:
[    1.393161][    T1] Name                      Used          Total
[    1.393701][    T1] rpc_buffers               19KB         31KB
[    1.394231][    T1] rpc_tasks                  5KB          7KB
[    1.394759][    T1] RAW                        2KB         15KB
[    1.395287][    T1] UDP                        1KB         15KB
[    1.395816][    T1] hugetlbfs_inode_cache          0KB          7KB
[    1.396375][    T1] bio-224                   20KB         22KB
[    1.396905][    T1] bio-160                    1KB          7KB
[    1.397431][    T1] biovec-max               150KB        155KB
[    1.397958][    T1] dmaengine-unmap-2          0KB          4KB
[    1.398488][    T1] audit_buffer               0KB          7KB
[    1.399010][    T1] skbuff_head_cache          6KB         15KB
[    1.399538][    T1] task_delay_info           13KB         18KB
[    1.400061][    T1] proc_dir_entry           120KB        127KB
[    1.400590][    T1] shmem_inode_cache         92KB         92KB
[    1.401113][    T1] kernfs_node_cache       1770KB       1773KB
[    1.401640][    T1] mnt_cache                 12KB         15KB
[    1.402160][    T1] filp                       0KB          7KB
[    1.402691][    T1] names_cache              244KB        248KB
[    1.403223][    T1] avc_node                   3KB          7KB
[    1.403747][    T1] lsm_inode_cache         3437KB       3438KB
[    1.404273][    T1] lsm_file_cache             0KB          3KB
[    1.404800][    T1] nsproxy                    0KB          7KB
[    1.405328][    T1] mm_struct                  1KB         15KB
[    1.405847][    T1] fs_cache                   0KB          4KB
[    1.406375][    T1] files_cache                1KB         15KB
[    1.406903][    T1] signal_cache              45KB         60KB
[    1.407440][    T1] sighand_cache             75KB         90KB
[    1.407960][    T1] task_struct              121KB        170KB
[    1.408494][    T1] cred_jar                  16KB         23KB
[    1.409032][    T1] pid                       16KB         23KB
[    1.409573][    T1] Acpi-Operand             142KB        196KB
[    1.410112][    T1] Acpi-ParseExt              0KB         15KB
[    1.410656][    T1] Acpi-Parse                 0KB         15KB
[    1.411176][    T1] Acpi-State                 0KB         15KB
[    1.411717][    T1] Acpi-Namespace           107KB        113KB
[    1.412247][    T1] numa_policy                0KB          7KB
[    1.412771][    T1] trace_event_file         588KB        591KB
[    1.413297][    T1] ftrace_event_field       1725KB       1726KB
[    1.413831][    T1] pool_workqueue            16KB         30KB
[    1.414361][    T1] vmap_area                  6KB          7KB
[    1.414882][    T1] debug_objects_cache         88KB         90KB
[    1.415432][    T1] kmalloc-8k               120KB        120KB
[    1.415954][    T1] kmalloc-4k               636KB        648KB
[    1.416489][    T1] kmalloc-2k               630KB        660KB
[    1.417009][    T1] kmalloc-1k               528KB        540KB
[    1.417541][    T1] kmalloc-512              249KB        255KB
[    1.418065][    T1] kmalloc-256              236KB        240KB
[    1.418596][    T1] kmalloc-192               51KB         55KB
[    1.419146][    T1] kmalloc-128              114KB        120KB
[    1.419711][    T1] kmalloc-96               142KB        145KB
[    1.420254][    T1] kmalloc-64               467KB        468KB
[    1.420799][    T1] kmalloc-32               265KB        277KB
[    1.421344][    T1] kmalloc-16               193KB        206KB
[    1.421894][    T1] kmalloc-8                248KB        300KB
[    1.422439][    T1] kmem_cache_node           72KB         72KB
[    1.422973][    T1] kmem_cache                90KB         90KB
[    1.423519][    T1] Tasks state (memory values in pages):
[    1.424006][    T1] [  pid  ]   uid  tgid total_vm      rss pgtables_bytes swapents oom_score_adj name
[    1.424846][    T1] Out of memory and no killable processes...
[    1.425383][    T1] Kernel panic - not syncing: System is deadlocked on memory
[    1.426039][    T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.12.0-rc3+ #1
[    1.426376][    T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
[    1.426376][    T1] Call Trace:
[    1.426376][    T1]  dump_stack+0x89/0xb4
[    1.426376][    T1]  panic+0x18a/0x389
[    1.426376][    T1]  ? print_oops_end_marker.cold.9+0x10/0x10
[    1.426376][    T1]  ? out_of_memory.cold.45+0x66/0xb2
[    1.426376][    T1]  out_of_memory.cold.45+0x7e/0xb2
[    1.426376][    T1]  ? oom_killer_disable+0x200/0x200
[    1.426376][    T1]  ? __zone_watermark_ok+0x72/0x1c0
[    1.426376][    T1]  __alloc_pages_slowpath.constprop.122+0xfff/0x10e0
[    1.426376][    T1]  ? warn_alloc+0x120/0x120
[    1.426376][    T1]  ? shmem_reserve_inode+0x1e1/0x210
[    1.426376][    T1]  ? shmem_mknod+0x39/0x110
[    1.426376][    T1]  ? kasan_unpoison+0x38/0x60
[    1.426376][    T1]  __alloc_pages_nodemask+0x3d1/0x400
[    1.426376][    T1]  ? __alloc_pages_slowpath.constprop.122+0x10e0/0x10e0
[    1.426376][    T1]  ? find_first_bit+0x19/0x70
[    1.426376][    T1]  ? offset_il_node+0x4b/0x90
[    1.426376][    T1]  alloc_page_interleave+0xd/0xc0
[    1.426376][    T1]  shmem_alloc_page+0xe7/0x160
[    1.426376][    T1]  ? shmem_free_swap+0x60/0x60
[    1.426376][    T1]  ? percpu_counter_add_batch+0x1f/0xa0
[    1.426376][    T1]  ? percpu_counter_add_batch+0x1f/0xa0
[    1.426376][    T1]  shmem_getpage_gfp.isra.74+0x223/0xd90
[    1.426376][    T1]  ? shmem_swapin_page+0xbf0/0xbf0
[    1.426376][    T1]  ? iov_iter_advance+0xe1/0x650
[    1.426376][    T1]  ? shmem_write_end+0xe0/0x3b0
[    1.426376][    T1]  generic_perform_write+0x1da/0x2e0
[    1.426376][    T1]  ? page_cache_next_miss+0x170/0x170
[    1.426376][    T1]  ? __mnt_drop_write_file+0xd/0x40
[    1.426376][    T1]  ? file_update_time+0x19d/0x210
[    1.426376][    T1]  ? update_time+0x60/0x60
[    1.426376][    T1]  ? generic_write_checks+0x10f/0x1a0
[    1.426376][    T1]  __generic_file_write_iter+0x18c/0x280
[    1.426376][    T1]  generic_file_write_iter+0x72/0xe0
[    1.426376][    T1]  __kernel_write+0x295/0x540
[    1.426376][    T1]  ? do_iter_readv_writev+0x330/0x330
[    1.426376][    T1]  ? preempt_schedule_common+0x29/0x40
[    1.426376][    T1]  ? __cond_resched+0x18/0x20
[    1.426376][    T1]  ? __inode_security_revalidate+0x68/0x80
[    1.426376][    T1]  kernel_write+0x70/0x170
[    1.426376][    T1]  xwrite.constprop.3+0x30/0x63
[    1.426376][    T1]  do_copy+0xf9/0x158
[    1.426376][    T1]  ? xwrite.constprop.3+0x63/0x63
[    1.426376][    T1]  write_buffer+0x30/0x41
[    1.426376][    T1]  flush_buffer+0x33/0x9a
[    1.426376][    T1]  ? initrd_load+0x3a/0x3a
[    1.426376][    T1]  __gunzip+0x366/0x447
[    1.426376][    T1]  ? write_buffer+0x41/0x41
[    1.426376][    T1]  ? bunzip2+0x579/0x579
[    1.426376][    T1]  ? initrd_load+0x3a/0x3a
[    1.426376][    T1]  ? __gunzip+0x447/0x447
[    1.426376][    T1]  gunzip+0xe/0x11
[    1.426376][    T1]  ? initrd_load+0x3a/0x3a
[    1.426376][    T1]  unpack_to_rootfs+0x1e4/0x3a7
[    1.426376][    T1]  ? initrd_load+0x3a/0x3a
[    1.426376][    T1]  ? retain_initrd_param+0x21/0x21
[    1.426376][    T1]  ? wake_up_q+0xd0/0xd0
[    1.426376][    T1]  ? _raw_spin_unlock_irqrestore+0xd/0x20
[    1.426376][    T1]  ? reserve_initrd_mem+0x197/0x197
[    1.426376][    T1]  populate_rootfs+0x92/0x1b0
[    1.426376][    T1]  ? reserve_initrd_mem+0x197/0x197
[    1.426376][    T1]  do_one_initcall+0x84/0x270
[    1.426376][    T1]  ? trace_event_raw_event_initcall_finish+0x130/0x130
[    1.426376][    T1]  ? __wake_up_common+0x200/0x200
[    1.426376][    T1]  ? __kasan_kmalloc+0x97/0xc0
[    1.426376][    T1]  ? __kmalloc+0x153/0x300
[    1.426376][    T1]  kernel_init_freeable+0x27d/0x2d0
[    1.426376][    T1]  ? rest_init+0xb5/0xb5
[    1.426376][    T1]  kernel_init+0x7/0x11b
[    1.426376][    T1]  ? rest_init+0xb5/0xb5
[    1.426376][    T1]  ret_from_fork+0x22/0x30
[    1.426376][    T1] ---[ end Kernel panic - not syncing: System is deadlocked on memory ]---


kinda wield. this let me unable to start a single kvm program to debug.