Re: Crash report: Broken NUMA distance map causes crash on arm64 system

From: John Garry
Date: Tue Oct 30 2018 - 11:36:09 EST

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On 30/10/2018 09:55, John Garry wrote:

On 30/10/2018 09:26, Peter Zijlstra wrote:

On Tue, Oct 23, 2018 at 11:30:11AM +0100, John Garry wrote:

Hi all,

I have stumbled upon this crash on my arm64 system:

[ 7.040874] SMP: Total of 64 processors activated.
[ 7.045720] CPU features: detected: GIC system register CPU interface
[ 7.052240] CPU features: detected: 32-bit EL0 Support
[ 7.144026] CPU: All CPU(s) started at EL2
[ 7.148298] alternatives: patching kernel code
[ 7.155277] Unable to handle kernel NULL pointer dereference at
virtual
address 0000000000000000
[ 7.164163] Mem abort info:
[ 7.166978] ESR = 0x96000004
[ 7.170061] Exception class = DABT (current EL), IL = 32 bits
[ 7.176043] SET = 0, FnV = 0
[ 7.179121] EA = 0, S1PTW = 0
[ 7.182291] Data abort info:
[ 7.185193] ISV = 0, ISS = 0x00000004
[ 7.189066] CM = 0, WnR = 0
[ 7.192056] [0000000000000000] user address but active_mm is swapper
[ 7.198480] Internal error: Oops: 96000004 [#1] PREEMPT SMP
[ 7.204107] Modules linked in:
[ 7.207189] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W
4.19.0-00002-g3ed52fd-dirty #807
[ 7.216596] Hardware name: Hisilicon Hip07 D05 Development Board (DT)
[ 7.223102] pstate: 20000005 (nzCv daif -PAN -UAO)
[ 7.227946] pc : __ll_sc_atomic_sub_return+0x4/0x20
[ 7.232873] lr : free_sched_groups.part.1+0x40/0x98
[ 7.237797] sp : ffff00000947bc60
[ 7.241138] x29: ffff00000947bc60 x28: ffff801fb49ba000
[ 7.246504] x27: ffff000009109b38 x26: ffff801fb4a38000
[ 7.251869] x25: ffff801fb48cc000 x24: ffff000009109000
[ 7.257235] x23: 0000000000000010 x22: 0000000000000001
[ 7.262599] x21: ffff801fb4a0b000 x20: ffff801fb4a65f00
[ 7.267964] x19: ffff801fb4a65f80 x18: 0000000000000400
[ 7.273329] x17: 00000000ffffffff x16: 0000000000000000
[ 7.278694] x15: ffff801ffbffef80 x14: ffff7e007ed14bc0
[ 7.284059] x13: 00000000000000c0 x12: 000000000000003f
[ 7.289423] x11: ffff801fb62258b8 x10: 0000000000000001
[ 7.294788] x9 : ffff801fb44b0100 x8 : 000000000000000f
[ 7.300153] x7 : ffff801fb48b1900 x6 : 0000801ff2efb000
[ 7.305518] x5 : ffff0000091096f0 x4 : 0000000000000400
[ 7.310882] x3 : ffff801fb4a65000 x2 : ffff801fb4a0b000
[ 7.316247] x1 : 0000000000000000 x0 : 0000000000000001
[ 7.321613] Process swapper/0 (pid: 1, stack limit =
0x(____ptrval____))
[ 7.328382] Call trace:
[ 7.330847] __ll_sc_atomic_sub_return+0x4/0x20
[ 7.335420] destroy_sched_domain+0x20/0x70
[ 7.339642] cpu_attach_domain+0xc8/0x2e8
[ 7.343687] build_sched_domains+0xd44/0xde0
[ 7.347996] sched_init_domains+0x68/0x88
[ 7.352044] sched_init_smp+0x2c/0x7c
[ 7.355738] kernel_init_freeable+0xdc/0x244
[ 7.360049] kernel_init+0x10/0x108
[ 7.363567] ret_from_fork+0x10/0x18
[ 7.367174] Code: 88107c31 35ffffb0 d65f03c0 f9800031 (885f7c31)
[ 7.373400] ---[ end trace 8150af869a14363f ]---
[ 7.378076] Kernel panic - not syncing: Attempted to kill init!
exitcode=0x0000000b
[ 7.378076]
[ 7.387320] SMP: stopping secondary CPUs
[ 7.391297] ---[ end Kernel panic - not syncing: Attempted to kill
init!
exitcode=0x0000000b
[ 7.391297] ]---

I will straightaway note that I have been fiddling with my board's
device
tree, specifically (breaking!) the NUMA distance map, like this:

distance-matrix = <0 0 10>,
<0 1 15>,
<0 2 20>,
<0 3 25>,
<1 0 15>,
<1 1 10>,
<1 2 25>,
<1 3 30>,
<2 0 20>,
<2 1 25>,
<2 2 10>,
<2 3 15>,
<3 0 10>,* should be same as 0->3 and > 10
<3 1 10>,* should be same as 1->3 and > 10
<3 2 15>,
<3 3 15>;* should be 10

However I don't think that this should crash the kernel. I'd say
of_numa_parse_distance_map_v1() should robustly handle broken maps,
probably
by erroring and causing NUMA to be disabled.

If build with CONFIG_SCHED_DEBUG=y and boot with "sched_debug" I think
sched_init_numa() should yell at you for the above 'mistake'.

Right, I have since turned on debug and it was complaining - I'll
provide a log.

As promised:

EFI stub: Booting Linux Kernel...
SmiGraphicsOutputQueryMode +
SmiGraphicsOutputQueryMode -
SmiGraphicsOutputQueryMode +
SmiGraphicsOutputQueryMode -
EFI stub: Using DTB from configuration table
EFI stub: Exiting boot services and installing virtual address map...
[SAL_ClearAffiliationSMP,325]it is going to hard reset dev:0x500E004AAAAAAA1F
SAS ExitBootServicesEvent
GMAC ExitBootServicesEvent
GMAC ExitBootServicesEvent
GMAC ExitBootServicesEvent
GMAC ExitBootServicesEvent
OHCI ExitBootServicesEvent
IPMI ExitBootService Event
TransferSmbiosToBMC EVENT.
Transfer Smbios Table To iBMC Success.
GetVariable Status : Not Found.
[ 0.000000] Booting Linux on physical CPU 0x0000010000 [0x410fd082]
[ 0.000000] Linux version 4.19.0-rc6-00002-gea67197-dirty (johnpgarry@johnpgarry-ThinkCentre-M93p) (gcc version 7.3.1 20180425 [linaro-7.3-2018.05-rc1 revision 38aec9a676236eaa42ca03ccb3a6c1dd0182c29f] (Linaro GCC 7.3-2018.05-rc1)) #877 SMP PREEMPT Tue Oct 30 15:10:30 GMT 2018
[ 0.000000] Machine model: Hisilicon Hip07 D05 Development Board
[ 0.000000] earlycon: pl11 at MMIO 0x00000000602b0000 (options '')
[ 0.000000] bootconsole [pl11] enabled
[ 0.000000] efi: Getting EFI parameters from FDT:
[ 0.000000] efi: EFI v2.60 by EDK II
[ 0.000000] efi: SMBIOS=0x3f050000 SMBIOS 3.0=0x39b00000 ACPI=0x39bd0000 ACPI 2.0=0x39bd0014 MEMATTR=0x3cc99018
[ 0.000000] crashkernel reserved: 0x0000000002000000 - 0x0000000012000000 (256 MB)
[ 0.000000] cma: Reserved 32 MiB at 0x000000003d000000
[ 0.000000] earlycon: pl11 at MMIO32 0x00000000602b0000 (options '115200n8')
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] console 'pl11' already registered
[ 0.000000] WARNING: CPU: 0 PID: 0 at kernel/printk/printk.c:2586 register_console+0x58/0x3c8
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.19.0-rc6-00002-gea67197-dirty #877
[ 0.000000] Hardware name: Hisilicon Hip07 D05 Development Board (DT)
[ 0.000000] pstate: 60000085 (nZCv daIf -PAN -UAO)
[ 0.000000] pc : register_console+0x58/0x3c8
[ 0.000000] lr : register_console+0x58/0x3c8
[ 0.000000] sp : ffff000009113de0
[ 0.000000] x29: ffff000009113de0 x28: 0000000000fc0018
[ 0.000000] x27: 000000003cc81018 x26: ffff0000090e2098
[ 0.000000] x25: 0000000000004b10 x24: ffff0000090f5348
[ 0.000000] x23: ffff0000090e2098 x22: ffff000009274000
[ 0.000000] x21: ffff00000920e6d0 x20: 0000000000004b10
[ 0.000000] x19: ffff00000920e6d0 x18: ffffffffffffffff
[ 0.000000] x17: 0000000000000000 x16: 0000000000000000
[ 0.000000] x15: ffff0000091196c8 x14: ffff0000892746ef
[ 0.000000] x13: ffff0000092746fd x12: ffff000009119940
[ 0.000000] x11: ffff0000085f42b8 x10: ffff000009113ab0
[ 0.000000] x9 : 000000000000000d x8 : 722079646165726c
[ 0.000000] x7 : 61202731316c7027 x6 : 000000000000000d
[ 0.000000] x5 : 0000000000000000 x4 : 0000000000000000
[ 0.000000] x3 : ffffffffffffffff x2 : ffff000009131640
[ 0.000000] x1 : 0000000000000000 x0 : 0000000000000000
[ 0.000000] Call trace:
[ 0.000000] register_console+0x58/0x3c8
[ 0.000000] of_setup_earlycon+0x20c/0x22c
[ 0.000000] early_init_dt_scan_chosen_stdout+0x158/0x19c
[ 0.000000] acpi_boot_table_init+0x150/0x184
[ 0.000000] setup_arch+0x1cc/0x514
[ 0.000000] start_kernel+0x80/0x418
[ 0.000000] random: get_random_bytes called from print_oops_end_marker+0x48/0x68 with crng_init=0
[ 0.000000] ---[ end trace 0000000000000000 ]---
[ 0.000000] OF: NUMA: parsing numa-distance-map-v1
[ 0.000000] NUMA: Warning: invalid distance parameter, from=3 to=3 distance=15
[ 0.000000] NUMA: NODE_DATA [mem 0x1ffbffe840-0x1ffbffffff]
[ 0.000000] NUMA: Initmem setup node 1 [<memory-less node>]
[ 0.000000] NUMA: NODE_DATA [mem 0x41ffbf41fc0-0x41ffbf4377f]
[ 0.000000] NUMA: NODE_DATA(1) on node 2
[ 0.000000] NUMA: NODE_DATA [mem 0x41ffbf40800-0x41ffbf41fbf]
[ 0.000000] NUMA: Initmem setup node 3 [<memory-less node>]
[ 0.000000] NUMA: NODE_DATA [mem 0x41ffbf3f040-0x41ffbf407ff]
[ 0.000000] NUMA: NODE_DATA(3) on node 2
[ 0.000000] Zone ranges:
[ 0.000000] DMA32 [mem 0x0000000000000000-0x00000000ffffffff]
[ 0.000000] Normal [mem 0x0000000100000000-0x0000041ffbffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x0000000031902fff]
[ 0.000000] node 0: [mem 0x0000000031903000-0x0000000031906fff]
[ 0.000000] node 0: [mem 0x0000000031907000-0x000000003999ffff]
[ 0.000000] node 0: [mem 0x00000000399a0000-0x0000000039a3ffff]
[ 0.000000] node 0: [mem 0x0000000039a40000-0x0000000039a8ffff]
[ 0.000000] node 0: [mem 0x0000000039a90000-0x0000000039a9ffff]
[ 0.000000] node 0: [mem 0x0000000039aa0000-0x0000000039aeffff]
[ 0.000000] node 0: [mem 0x0000000039af0000-0x0000000039bbffff]
[ 0.000000] node 0: [mem 0x0000000039bc0000-0x0000000039bdffff]
[ 0.000000] node 0: [mem 0x0000000039be0000-0x000000003a05ffff]
[ 0.000000] node 0: [mem 0x000000003a060000-0x000000003f04ffff]
[ 0.000000] node 0: [mem 0x000000003f050000-0x000000003f07ffff]
[ 0.000000] node 0: [mem 0x000000003f080000-0x000000003fbfffff]
[ 0.000000] node 0: [mem 0x0000001040000000-0x0000001ffbffffff]
[ 0.000000] node 2: [mem 0x0000041000000000-0x0000041ffbffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x0000001ffbffffff]
[ 0.000000] Could not find start_pfn for node 1
[ 0.000000] Initmem setup node 1 [mem 0x0000000000000000-0x0000000000000000]
[ 0.000000] Initmem setup node 2 [mem 0x0000041000000000-0x0000041ffbffffff]
[ 0.000000] Could not find start_pfn for node 3
[ 0.000000] Initmem setup node 3 [mem 0x0000000000000000-0x0000000000000000]
[ 0.000000] percpu: Embedded 23 pages/cpu @(____ptrval____) s56408 r8192 d29608 u94208
[ 0.000000] Detected PIPT I-cache on CPU0
[ 0.000000] CPU features: enabling workaround for EL2 vector hardening
[ 0.000000] CPU features: detected: Kernel page table isolation (KPTI)
[ 0.000000] Built 4 zonelists, mobility grouping on. Total pages: 32996880
[ 0.000000] Policy zone: Normal
[ 0.000000] Kernel command line: BOOT_IMAGE=/john/Image rdinit=/init crashkernel=256M@32M console=ttyAMA0,115200 earlycon=pl011,mmio,0x602b0000 acpi=off pcie_aspm=off earlycon sched_debug
[ 0.000000] log_buf_len individual max cpu contribution: 4096 bytes
[ 0.000000] log_buf_len total cpu_extra contributions: 258048 bytes
[ 0.000000] log_buf_len min size: 131072 bytes
[ 0.000000] log_buf_len: 524288 bytes
[ 0.000000] early log buf free: 123328(94%)
[ 0.000000] software IO TLB: mapped [mem 0x359a0000-0x399a0000] (64MB)
[ 0.000000] Memory: 131332180K/134082560K available (10684K kernel code, 1374K rwdata, 4896K rodata, 1344K init, 384K bss, 2717612K reserved, 32768K cma-reserved)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=64, Nodes=4
[ 0.000000] rcu: Preemptible hierarchical RCU implementation.
[ 0.000000] Tasks RCU enabled.
[ 0.000000] NR_IRQS: 64, nr_irqs: 64, preallocated irqs: 0
[ 0.000000] GICv3: GIC: Using split EOI/Deactivate mode
[ 0.000000] GICv3: Distributor has no Range Selector support
[ 0.000000] GICv3: VLPI support, direct LPI support
[ 0.000000] ITS [mem 0x4c000000-0x4c03ffff]
[ 0.000000] ITS@0x000000004c000000: Using ITS number 0
[ 0.000000] GIC: enabling workaround for ITS: Hip07 erratum 161600802
[ 0.000000] ITS@0x000000004c000000: allocated 524288 Devices @1fbb000000 (flat, esz 8, psz 16K, shr 1)
[ 0.000000] ITS@0x000000004c000000: allocated 65536 Virtual CPUs @1fbb980000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] ITS@0x000000004c000000: allocated 512 Interrupt Collections @1fbb929000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] ITS [mem 0x6c000000-0x6c03ffff]
[ 0.000000] ITS@0x000000006c000000: Using ITS number 1
[ 0.000000] GIC: enabling workaround for ITS: Hip07 erratum 161600802
[ 0.000000] ITS@0x000000006c000000: allocated 524288 Devices @1fbac00000 (flat, esz 8, psz 16K, shr 1)
[ 0.000000] ITS@0x000000006c000000: allocated 65536 Virtual CPUs @1fbba00000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] ITS@0x000000006c000000: allocated 512 Interrupt Collections @1fbb92a000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] ITS [mem 0xc6000000-0xc603ffff]
[ 0.000000] ITS@0x00000000c6000000: Using ITS number 2
[ 0.000000] GIC: enabling workaround for ITS: Hip07 erratum 161600802
[ 0.000000] ITS@0x00000000c6000000: allocated 524288 Devices @1fba800000 (flat, esz 8, psz 16K, shr 1)
[ 0.000000] ITS@0x00000000c6000000: allocated 65536 Virtual CPUs @1fbba80000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] ITS@0x00000000c6000000: allocated 512 Interrupt Collections @1fbb92c000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] ITS [mem 0x8c6000000-0x8c603ffff]
[ 0.000000] ITS@0x00000008c6000000: Using ITS number 3
[ 0.000000] GIC: enabling workaround for ITS: Hip07 erratum 161600802
[ 0.000000] ITS@0x00000008c6000000: allocated 524288 Devices @1fba400000 (flat, esz 8, psz 16K, shr 1)
[ 0.000000] ITS@0x00000008c6000000: allocated 65536 Virtual CPUs @1fbbb00000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] ITS@0x00000008c6000000: allocated 512 Interrupt Collections @1fbb92e000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] ITS [mem 0x4004c000000-0x4004c03ffff]
[ 0.000000] ITS@0x000004004c000000: Using ITS number 4
[ 0.000000] GIC: enabling workaround for ITS: Hip07 erratum 161600802
[ 0.000000] ITS@0x000004004c000000: allocated 524288 Devices @1fba000000 (flat, esz 8, psz 16K, shr 1)
[ 0.000000] ITS@0x000004004c000000: allocated 65536 Virtual CPUs @1fbbb80000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] ITS@0x000004004c000000: allocated 512 Interrupt Collections @1fbb92f000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] ITS [mem 0x4006c000000-0x4006c03ffff]
[ 0.000000] ITS@0x000004006c000000: Using ITS number 5
[ 0.000000] GIC: enabling workaround for ITS: Hip07 erratum 161600802
[ 0.000000] ITS@0x000004006c000000: allocated 524288 Devices @1fb9800000 (flat, esz 8, psz 16K, shr 1)
[ 0.000000] ITS@0x000004006c000000: allocated 65536 Virtual CPUs @1fb9c80000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] ITS@0x000004006c000000: allocated 512 Interrupt Collections @1fb9c10000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] ITS [mem 0x400c6000000-0x400c603ffff]
[ 0.000000] ITS@0x00000400c6000000: Using ITS number 6
[ 0.000000] GIC: enabling workaround for ITS: Hip07 erratum 161600802
[ 0.000000] ITS@0x00000400c6000000: allocated 524288 Devices @1fb9400000 (flat, esz 8, psz 16K, shr 1)
[ 0.000000] ITS@0x00000400c6000000: allocated 65536 Virtual CPUs @1fb9d00000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] ITS@0x00000400c6000000: allocated 512 Interrupt Collections @1fb9c11000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] ITS [mem 0x408c6000000-0x408c603ffff]
[ 0.000000] ITS@0x00000408c6000000: Using ITS number 7
[ 0.000000] GIC: enabling workaround for ITS: Hip07 erratum 161600802
[ 0.000000] ITS@0x00000408c6000000: allocated 524288 Devices @1fb9000000 (flat, esz 8, psz 16K, shr 1)
[ 0.000000] ITS@0x00000408c6000000: allocated 65536 Virtual CPUs @1fb9d80000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] ITS@0x00000408c6000000: allocated 512 Interrupt Collections @1fb9c13000 (flat, esz 8, psz 4K, shr 1)
[ 0.000000] GIC: using LPI property table @0x0000001fb9c40000
[ 0.000000] ITS: Using DirectLPI for VPE invalidation
[ 0.000000] ITS: Enabling GICv4 support
[ 0.000000] GICv3: CPU0: found redistributor 10000 region 0:0x000000004d100000
[ 0.000000] CPU0: using LPI pending table @0x0000001fb9c50000
[ 0.000000] arch_timer: cp15 timer(s) running at 50.00MHz (phys).
[ 0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0xb8812736b, max_idle_ns: 440795202655 ns
[ 0.000001] sched_clock: 56 bits at 50MHz, resolution 20ns, wraps every 4398046511100ns
[ 0.008253] Console: colour dummy device 80x25
[ 0.012797] mempolicy: Enabling automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl
[ 0.024161] Calibrating delay loop (skipped), value calculated using timer frequency.. 100.00 BogoMIPS (lpj=200000)
[ 0.034714] pid_max: default: 65536 minimum: 512
[ 0.039437] Security Framework initialized
[ 0.066552] Dentry cache hash table entries: 8388608 (order: 14, 67108864 bytes)
[ 0.085423] Inode-cache hash table entries: 4194304 (order: 13, 33554432 bytes)
[ 0.093195] Mount-cache hash table entries: 131072 (order: 8, 1048576 bytes)
[ 0.100677] Mountpoint-cache hash table entries: 131072 (order: 8, 1048576 bytes)
[ 0.152289] ASID allocator initialised with 32768 entries
[ 0.157776] rcu: Hierarchical SRCU implementation.
[ 0.170653] Platform MSI: interrupt-controller@4c000000 domain created
[ 0.177254] Platform MSI: interrupt-controller@6c000000 domain created
[ 0.183853] Platform MSI: interrupt-controller@c6000000 domain created
[ 0.190452] Platform MSI: interrupt-controller@8,c6000000 domain created
[ 0.197227] Platform MSI: interrupt-controller@400,4c000000 domain created
[ 0.204178] Platform MSI: interrupt-controller@400,6c000000 domain created
[ 0.211129] Platform MSI: interrupt-controller@400,c6000000 domain created
[ 0.218079] Platform MSI: interrupt-controller@408,c6000000 domain created
[ 0.225076] PCI/MSI: /interrupt-controller@4d000000/interrupt-controller@4c000000 domain created
[ 0.233960] PCI/MSI: /interrupt-controller@4d000000/interrupt-controller@6c000000 domain created
[ 0.242844] PCI/MSI: /interrupt-controller@4d000000/interrupt-controller@c6000000 domain created
[ 0.251729] PCI/MSI: /interrupt-controller@4d000000/interrupt-controller@8,c6000000 domain created
[ 0.260790] PCI/MSI: /interrupt-controller@4d000000/interrupt-controller@400,4c000000 domain created
[ 0.270026] PCI/MSI: /interrupt-controller@4d000000/interrupt-controller@400,6c000000 domain created
[ 0.279261] PCI/MSI: /interrupt-controller@4d000000/interrupt-controller@400,c6000000 domain created
[ 0.288497] PCI/MSI: /interrupt-controller@4d000000/interrupt-controller@408,c6000000 domain created
[ 0.298192] Remapping and enabling EFI services.
[ 0.310865] smp: Bringing up secondary CPUs ...
[ 0.398048] Detected PIPT I-cache on CPU1
[ 0.398060] GICv3: CPU1: found redistributor 10001 region 0:0x000000004d140000
[ 0.398118] CPU1: using LPI pending table @0x0000041fb81e0000
[ 0.398238] CPU1: Booted secondary processor 0x0000010001 [0x410fd082]
[ 0.480668] Detected PIPT I-cache on CPU2
[ 0.480674] GICv3: CPU2: found redistributor 10002 region 0:0x000000004d180000
[ 0.480730] CPU2: using LPI pending table @0x0000041fb81f0000
[ 0.480833] CPU2: Booted secondary processor 0x0000010002 [0x410fd082]
[ 0.563294] Detected PIPT I-cache on CPU3
[ 0.563301] GICv3: CPU3: found redistributor 10003 region 0:0x000000004d1c0000
[ 0.563360] CPU3: using LPI pending table @0x0000041fb8200000
[ 0.563466] CPU3: Booted secondary processor 0x0000010003 [0x410fd082]
[ 0.645921] Detected PIPT I-cache on CPU4
[ 0.645929] GICv3: CPU4: found redistributor 10100 region 0:0x000000004d200000
[ 0.645988] CPU4: using LPI pending table @0x0000041fb8210000
[ 0.646092] CPU4: Booted secondary processor 0x0000010100 [0x410fd082]
[ 0.728547] Detected PIPT I-cache on CPU5
[ 0.728554] GICv3: CPU5: found redistributor 10101 region 0:0x000000004d240000
[ 0.728611] CPU5: using LPI pending table @0x0000041fb8220000
[ 0.728714] CPU5: Booted secondary processor 0x0000010101 [0x410fd082]
[ 0.811174] Detected PIPT I-cache on CPU6
[ 0.811181] GICv3: CPU6: found redistributor 10102 region 0:0x000000004d280000
[ 0.811238] CPU6: using LPI pending table @0x0000041fb8230000
[ 0.811342] CPU6: Booted secondary processor 0x0000010102 [0x410fd082]
[ 0.893801] Detected PIPT I-cache on CPU7
[ 0.893808] GICv3: CPU7: found redistributor 10103 region 0:0x000000004d2c0000
[ 0.893864] CPU7: using LPI pending table @0x0000041fb8240000
[ 0.893969] CPU7: Booted secondary processor 0x0000010103 [0x410fd082]
[ 0.976430] Detected PIPT I-cache on CPU8
[ 0.976438] GICv3: CPU8: found redistributor 10200 region 0:0x000000004d300000
[ 0.976494] CPU8: using LPI pending table @0x0000041fb8250000
[ 0.976599] CPU8: Booted secondary processor 0x0000010200 [0x410fd082]
[ 1.059056] Detected PIPT I-cache on CPU9
[ 1.059063] GICv3: CPU9: found redistributor 10201 region 0:0x000000004d340000
[ 1.059118] CPU9: using LPI pending table @0x0000041fb8260000
[ 1.059221] CPU9: Booted secondary processor 0x0000010201 [0x410fd082]
[ 1.141682] Detected PIPT I-cache on CPU10
[ 1.141689] GICv3: CPU10: found redistributor 10202 region 0:0x000000004d380000
[ 1.141745] CPU10: using LPI pending table @0x0000041fb8270000
[ 1.141848] CPU10: Booted secondary processor 0x0000010202 [0x410fd082]
[ 1.224310] Detected PIPT I-cache on CPU11
[ 1.224317] GICv3: CPU11: found redistributor 10203 region 0:0x000000004d3c0000
[ 1.224375] CPU11: using LPI pending table @0x0000041fb8280000
[ 1.224477] CPU11: Booted secondary processor 0x0000010203 [0x410fd082]
[ 1.306938] Detected PIPT I-cache on CPU12
[ 1.306948] GICv3: CPU12: found redistributor 10300 region 0:0x000000004d400000
[ 1.307004] CPU12: using LPI pending table @0x0000041fb8290000
[ 1.307110] CPU12: Booted secondary processor 0x0000010300 [0x410fd082]
[ 1.389564] Detected PIPT I-cache on CPU13
[ 1.389571] GICv3: CPU13: found redistributor 10301 region 0:0x000000004d440000
[ 1.389629] CPU13: using LPI pending table @0x0000041fb82a0000
[ 1.389733] CPU13: Booted secondary processor 0x0000010301 [0x410fd082]
[ 1.472190] Detected PIPT I-cache on CPU14
[ 1.472198] GICv3: CPU14: found redistributor 10302 region 0:0x000000004d480000
[ 1.472252] CPU14: using LPI pending table @0x0000041fb82b0000
[ 1.472598] CPU14: Booted secondary processor 0x0000010302 [0x410fd082]
[ 1. 1.554883] CPU15: using LPI pending table @0x0000041fb82c0000
[ 1.554988] CPU15: Booted secondary processor 0x0000010303 [0x410fd082]
[ 1.637107] Detected PIPT I-cache on CPU16
[ 1.637119] GICv3: CPU16: found redistributor 30000 region 1:0x000000006d100000
[ 1.637182] CPU16: using LPI pending table @0x0000041fb82d0000
[ 1.637329] CPU16: Booted secondary processor 0x0000030000 [0x410fd082]
[ 1.719738] Detected PIPT I-cache on CPU17
[ 1.719747] GICv3: CPU17: found redistributor 30001 region 1:0x000000006d140000
[ 1.719806] CPU17: using LPI pending table @0x0000041fb82e0000
[ 1.719948] CPU17: Booted secondary processor 0x0000030001 [0x410fd082]
[ 1.802371] Detected PIPT I-cache on CPU18
[ 1.802380] GICv3: CPU18: found redistributor 30002 region 1:0x000000006d180000
[ 1.802441] CPU18: using LPI pending table @0x0000041fb82f0000
[ 1.802585] CPU18: Booted secondary processor 0x0000030002 [0x410fd082]
[ 1.885004] Detected PIPT I-cache on CPU19
[ 1.885013] GICv3: CPU19: found redistributor 30003 region 1:0x000000006d1c0000
[ 1.885074] CPU19: using LPI pending table @0x0000041fb8300000
[ 1.885215] CPU19: Booted secondary processor 0x0000030003 [0x410fd082]
[ 1.967639] Detected PIPT I-cache on CPU20
[ 1.967651] GICv3: CPU20: found redistributor 30100 region 1:0x000000006d200000
[ 1.967713] CPU20: using LPI pending table @0x0000041fb8310000
[ 1.967860] CPU20: Booted secondary processor 0x0000030100 [0x410fd082]
[ 2.050270] Detected PIPT I-cache on CPU21
[ 2.050279] GICv3: CPU21: found redistributor 30101 region 1:0x000000006d240000
[ 2.050341] CPU21: using LPI pending table @0x0000041fb8320000
[ 2.050483] CPU21: Booted secondary processor 0x0000030101 [0x410fd082]
[ 2.132903] Detected PIPT I-cache on CPU22
[ 2.132913] GICv3: CPU22: found redistributor 30102 region 1:0x000000006d280000
[ 2.132973] CPU22: using LPI pending table @0x0000041fb8330000
[ 2.133115] CPU22: Booted secondary processor 0x0000030102 [0x410fd082]
[ 2.215536] Detected PIPT I-cache on CPU23
[ 2.215546] GICv3: CPU23: found redistributor 30103 region 1:0x000000006d2c0000
[ 2.215606] CPU23: using LPI pending table @0x0000041fb8340000
[ 2.215749] CPU23: Booted secondary processor 0x0000030103 [0x410fd082]
[ 2.298171] Detected PIPT I-cache on CPU24
[ 2.298184] GICv3: CPU24: found redistributor 30200 region 1:0x000000006d300000
[ 2.298248] CPU24: using LPI pending table @0x0000041fb8350000
[ 2.298394] CPU24: Booted secondary processor 0x0000030200 [0x410fd082]
[ 2.380801] Detected PIPT I-cache on CPU25
[ 2.380811] GICv3: CPU25: found redistributor 30201 region 1:0x000000006d340000
[ 2.380872] CPU25: using LPI pending table @0x0000041fb8360000
[ 2.381013] CPU25: Booted secondary processor 0x0000030201 [0x410fd082]
[ 2.463433] Detected PIPT I-cache on CPU26
[ 2.463443] GICv3: CPU26: found redistributor 30202 region 1:0x000000006d380000
[ 2.463504] CPU26: using LPI pending table @0x0000041fb8370000
[ 2.463646] CPU26: Booted secondary processor 0x0000030202 [0x410fd082]
[ 2.546066] Detected PIPT I-cache on CPU27
[ 2.546076] GICv3: CPU27: found redistributor 30203 region 1:0x000000006d3c0000
[ 2.546139] CPU27: using LPI pending table @0x0000041fb8380000
[ 2.546282] CPU27: Booted secondary processor 0x0000030203 [0x410fd082]
[ 2.628701] Detected PIPT I-cache on CPU28
[ 2.628713] GICv3: CPU28: found redistributor 30300 region 1:0x000000006d400000
[ 2.628775] CPU28: using LPI pending table @0x0000041fb8390000
[ 2.628921] CPU28: Booted secondary processor 0x0000030300 [0x410fd082]
[ 2.711331] Detected PIPT I-cache on CPU29
[ 2.711342] GICv3: CPU29: found redistributor 30301 region 1:0x000000006d440000
[ 2.711403] CPU29: using LPI pending table @0x0000041fb83a0000
[ 2.711545] CPU29: Booted secondary processor 0x0000030301 [0x410fd082]
[ 2.793969] Detected PIPT I-cache on CPU30
[ 2.793979] GICv3: CPU30: found redistributor 30302 region 1:0x000000006d480000
[ 2.794040] CPU30: using LPI pending table @0x0000041fb83b0000
[ 2.794184] CPU30: Booted secondary processor 0x0000030302 [0x410fd082]
[ 2.876604] Detected PIPT I-cache on CPU31
[ 2.876615] GICv3: CPU31: found redistributor 30303 region 1:0x000000006d4c0000
[ 2.876677] CPU31: using LPI pending table @0x0000041fb83c0000
[ 2.876818] CPU31: Booted secondary processor 0x0000030303 [0x410fd082]
[ 2.958920] Detected PIPT I-cache on CPU32
[ 2.958961] GICv3: CPU32: found redistributor 50000 region 2:0x000004004d100000
[ 2.958994] CPU32: using LPI pending table @0x0000041fb83e0000
[ 2.959149] CPU32: Booted secondary processor 0x0000050000 [0x410fd082]
[ 3.041547] Detected PIPT I-cache on CPU33
[ 3.041572] GICv3: CPU33: found redistributor 50001 region 2:0x000004004d140000
[ 3.041597] CPU33: using LPI pending table @0x0000041fb83f0000
[ 3.041703] CPU33: Booted secondary processor 0x0000050001 [0x410fd082]
[ 3.124194] Detected PIPT I-cache on CPU34
[ 3.124218] GICv3: CPU34: found redistributor 50002 region 2:0x000004004d180000
[ 3.124244] CPU34: using LPI pending table @0x0000041fb7850000
[ 3.124351] CPU34: Booted secondary processor 0x0000050002 [0x410fd082]
[ 3.206841] Detected PIPT I-cache on CPU35
[ 3.206866] GICv3: CPU35: found redistributor 50003 region 2:0x000004004d1c0000
[ 3.206892] CPU35: using LPI pending table @0x0000041fb7860000
[ 3.206998] CPU35: Booted secondary processor 0x0000050003 [0x410fd082]
[ 3.289488] Detected PIPT I-cache on CPU36
[ 3.289514] GICv3: CPU36: found redistributor 50100 region 2:0x000004004d200000
[ 3.289540] CPU36: using LPI pending table @0x0000041fb7870000
[ 3.289649] CPU36: Booted secondary processor 0x0000050100 [0x410fd082]
[ 3.372137] Detected PIPT I-cache on CPU37
[ 3.372162] GICv3: CPU37: found redistributor 50101 region 2:0x000004004d240000
[ 3.372188] CPU37: using LPI pending table @0x0000041fb78d0000
[ 3.372294] CPU37: Booted secondary processor 0x0000050101 [0x410fd082]
[ 3.454782] Detected PIPT I-cache on CPU38
[ 3.454808] GICv3: CPU38: found redistributor 50102 region 2:0x000004004d280000
[ 3.454833] CPU38: using LPI pending table @0x0000041fb78e0000
[ 3.454940] CPU38: Booted secondary processor 0x0000050102 [0x410fd082]
[ 3.537432] Detected PIPT I-cache on CPU39
[ 3.537457] GICv3: CPU39: found redistributor 50103 region 2:0x000004004d2c0000
[ 3.537483] CPU39: using LPI pending table @0x0000041fb78f0000
[ 3.537589] CPU39: Booted secondary processor 0x0000050103 [0x410fd082]
[ 3.620080] Detected PIPT I-cache on CPU40
[ 3.620106] GICv3: CPU40: found redistributor 50200 region 2:0x000004004d300000
[ 3.620134] CPU40: using LPI pending table @0x0000041fb7940000
[ 3.620244] CPU40: Booted secondary processor 0x0000050200 [0x410fd082]
[ 3.702727] Detected PIPT I-cache on CPU41
[ 3.702752] GICv3: CPU41: found redistributor 50201 region 2:0x000004004d340000
[ 3.702778] CPU41: using LPI pending table @0x0000041fb7950000
[ 3.702885] CPU41: Booted secondary processor 0x0000050201 [0x410fd082]
[ 3.785375] Detected PIPT I-cache on CPU42
[ 3.785400] GICv3: CPU42: found redistributor 50202 region 2:0x000004004d380000
[ 3.785427] CPU42: using LPI pending table @0x0000041fb7960000
[ 3.785534] CPU42: Booted secondary processor 0x0000050202 [0x410fd082]
[ 3.868026] Detected PIPT I-cache on CPU43
[ 3.868052] GICv3: CPU43: found redistributor 50203 region 2:0x000004004d3c0000
[ 3.868080] CPU43: using LPI pending table @0x0000041fb79c0000
[ 3.868187] CPU43: Booted secondary processor 0x0000050203 [0x410fd082]
[ 3.950673] Detected PIPT I-cache on CPU44
[ 3.950700] GICv3: CPU44: found redistributor 50300 region 2:0x000004004d400000
[ 3.950728] CPU44: using LPI pending table @0x0000041fb79d0000
[ 3.950837] CPU44: Booted secondary processor 0x0000050300 [0x410fd082]
[ 4.033322] Detected PIPT I-cache on CPU45
[ 4.033348] GICv3: CPU45: found redistributor 50301 region 2:0x000004004d440000
[ 4.033374] CPU45: using LPI pending table @0x0000041fb79e0000
[ 4.033480] CPU45: Booted secondary processor 0x0000050301 [0x410fd082]
[ 4.115970] Detected PIPT I-cache on CPU46
[ 4.115996] GICv3: CPU46: found redistributor 50302 region 2:0x000004004d480000
[ 4.116023] CPU46: using LPI pending table @0x0000041fb7a40000
[ 4.116131] CPU46: Booted secondary processor 0x0000050302 [0x410fd082]
[ 4.198621] Detected PIPT I-cache on CPU47
[ 4.198647] GICv3: CPU47: found redistributor 50303 region 2:0x000004004d4c0000
[ 4.198674] CPU47: using LPI pending table @0x0000041fb7a50000
[ 4.198779] CPU47: Booted secondary processor 0x0000050303 [0x410fd082]
[ 4.280925] Detected PIPT I-cache on CPU48
[ 4.280958] GICv3: CPU48: found redistributor 70000 region 3:0x000004006d100000
[ 4.280996] CPU48: using LPI pending table @0x0000041fb7a60000
[ 4.281148] CPU48: Booted secondary processor 0x0000070000 [0x410fd082]
[ 4.363577] Detected PIPT I-cache on CPU49
[ 4.363606] GICv3: CPU49: found redistributor 70001 region 3:0x000004006d140000
[ 4.363643] CPU49: using LPI pending table @0x0000041fb7ae0000
[ 4.363788] CPU49: Booted secondary processor 0x0000070001 [0x410fd082]
[ 4.446225] Detected PIPT I-cache on CPU50
[ 4.446254] GICv3: CPU50: found redistributor 70002 region 3:0x000004006d180000
[ 4.446291] CPU50: using LPI pending table @0x0000041fb7af0000
[ 4.446438] CPU50: Booted secondary processor 0x0000070002 [0x410fd082]
[ 4.528875] Detected PIPT I-cache on CPU51
[ 4.528904] GICv3: CPU51: found redistributor 70003 region 3:0x000004006d1c0000
[ 4.528942] CPU51: using LPI pending table @0x0000041fb7b00000
[ 4.529089] CPU51: Booted secondary processor 0x0000070003 [0x410fd082]
[ 4.611527] Detected PIPT I-cache on CPU52
[ 4.611559] GICv3: CPU52: found redistributor 70100 region 3:0x000004006d200000
[ 4.611598] CPU52: using LPI pending table @0x0000041fb7b10000
[ 4.611750] CPU52: Booted secondary processor 0x0000070100 [0x410fd082]
[ 4.694176] Detected PIPT I-cache on CPU53
[ 4.694205] GICv3: CPU53: found redistributor 70101 region 3:0x000004006d240000
[ 4.694242] CPU53: using LPI pending table @0x0000041fb7b20000
[ 4.694389] CPU53: Booted secondary processor 0x0000070101 [0x410fd082]
[ 4.776826] Detected PIPT I-cache on CPU54
[ 4.776855] GICv3: CPU54: found redistributor 70102 region 3:0x000004006d280000
[ 4.776892] CPU54: using LPI pending table @0x0000041fb7b30000
[ 4.777039] CPU54: Booted secondary processor 0x0000070102 [0x410fd082]
[ 4.859476] Detected PIPT I-cache on CPU55
[ 4.859505] GICv3: CPU55: found redistributor 70103 region 3:0x000004006d2c0000
[ 4.859543] CPU55: using LPI pending table @0x0000041fb7b40000
[ 4.859689] CPU55: Booted secondary processor 0x0000070103 [0x410fd082]
[ 4.942127] Detected PIPT I-cache on CPU56
[ 4.942160] GICv3: CPU56: found redistributor 70200 region 3:0x000004006d300000
[ 4.942197] CPU56: using LPI pending table @0x0000041fb7b50000
[ 4.942352] CPU56: Booted secondary processor 0x0000070200 [0x410fd082]
[ 5.024775] Detected PIPT I-cache on CPU57
[ 5.024804] GICv3: CPU57: found redistributor 70201 region 3:0x000004006d340000
[ 5.024841] CPU57: using LPI pending table @0x0000041fb7b60000
[ 5.024988] CPU57: Booted secondary processor 0x0000070201 [0x410fd082]
[ 5.107423] Detected PIPT I-cache on CPU58
[ 5.107453] GICv3: CPU58: found redistributor 70202 region 3:0x000004006d380000
[ 5.107489] CPU58: using LPI pending table @0x0000041fb7b70000
[ 5.107635] CPU58: Booted secondary processor 0x0000070202 [0x410fd082]
[ 5.190075] Detected PIPT I-cache on CPU59
[ 5.190105] GICv3: CPU59: found redistributor 70203 region 3:0x000004006d3c0000
[ 5.190143] CPU59: using LPI pending table @0x0000041fb7b80000
[ 5.190289] CPU59: Booted secondary processor 0x0000070203 [0x410fd082]
[ 5.272725] Detected PIPT I-cache on CPU60
[ 5.272758] GICv3: CPU60: found redistributor 70300 region 3:0x000004006d400000
[ 5.272795] CPU60: using LPI pending table @0x0000041fb7b90000
[ 5.272950] CPU60: Booted secondary processor 0x0000070300 [0x410fd082]
[ 5.355374] Detected PIPT I-cache on CPU61
[ 5.355403] GICv3: CPU61: found redistributor 70301 region 3:0x000004006d440000
[ 5.355441] CPU61: using LPI pending table @0x0000041fb7ba0000
[ 5.355587] CPU61: Booted secondary processor 0x0000070301 [0x410fd082]
[ 5.438022] Detected PIPT I-cache on CPU62
[ 5.438052] GICv3: CPU62: found redistributor 70302 region 3:0x000004006d480000
[ 5.438089] CPU62: using LPI pending table @0x0000041fb7bb0000
[ 5.438235] CPU62: Booted secondary processor 0x0000070302 [0x410fd082]
[ 5.520675] Detected PIPT I-cache on CPU63
[ 5.520705] GICv3: CPU63: found redistributor 70303 region 3:0x000004006d4c0000
[ 5.520743] CPU63: using LPI pending table @0x0000041fb7bc0000
[ 5.520888] CPU63: Booted secondary processor 0x0000070303 [0x410fd082]
[ 5.520975] smp: Brought up 4 nodes, 64 CPUs
[ 7.042259] SMP: Total of 64 processors activated.
[ 7.047105] CPU features: detected: GIC system register CPU interface
[ 7.053625] CPU features: detected: 32-bit EL0 Support
[ 7.145591] CPU: All CPU(s) started at EL2
[ 7.149856] alternatives: patching kernel code
[ 7.154740] ERROR: Node-distance not symmetric
[ 7.154740]
[ 7.160724] 10 15 20 25
[ 7.163456] 15 10 25 30
[ 7.166190] 20 25 10 15
[ 7.168921] 10 10 15 10
[ 7.171655]
[ 7.175589] ERROR: groups don't span domain->span
[ 7.180352] ERROR: groups don't span domain->span
[ 7.185164] ERROR: groups don't span domain->span
[ 7.189926] ERROR: groups don't span domain->span
[ 7.194734] ERROR: groups don't span domain->span
[ 7.199495] ERROR: groups don't span domain->span
[ 7.204303] ERROR: groups don't span domain->span
[ 7.209064] ERROR: groups don't span domain->span
[ 7.213872] ERROR: groups don't span domain->span
[ 7.218632] ERROR: groups don't span domain->span
[ 7.223440] ERROR: groups don't span domain->span
[ 7.228201] ERROR: groups don't span domain->span
[ 7.233009] ERROR: groups don't span domain->span
[ 7.237770] ERROR: groups don't span domain->span
[ 7.242577] ERROR: groups don't span domain->span
[ 7.247337] ERROR: groups don't span domain->span
[ 7.252144] ERROR: groups don't span domain->span
[ 7.256905] ERROR: groups don't span domain->span
[ 7.261714] ERROR: groups don't span domain->span
[ 7.266474] ERROR: groups don't span domain->span
[ 7.271282] ERROR: groups don't span domain->span
[ 7.276042] ERROR: groups don't span domain->span
[ 7.280851] ERROR: groups don't span domain->span
[ 7.285611] ERROR: groups don't span domain->span
[ 7.290420] ERROR: groups don't span domain->span
[ 7.295180] ERROR: groups don't span domain->span
[ 7.299988] ERROR: groups don't span domain->span
[ 7.304748] ERROR: groups don't span domain->span
[ 7.309555] ERROR: groups don't span domain->span
[ 7.314315] ERROR: groups don't span domain->span
[ 7.319122] ERROR: groups don't span domain->span
[ 7.323883] ERROR: groups don't span domain->span
[ 7.328642] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
[ 7.337525] Mem abort info:
[ 7.340339] ESR = 0x96000004
[ 7.343421] Exception class = DABT (current EL), IL = 32 bits
[ 7.349403] SET = 0, FnV = 0
[ 7.352482] EA = 0, S1PTW = 0
[ 7.355651] Data abort info:
[ 7.358554] ISV = 0, ISS = 0x00000004
[ 7.362427] CM = 0, WnR = 0
[ 7.365418] [0000000000000000] user address but active_mm is swapper
[ 7.371840] Internal error: Oops: 96000004 [#1] PREEMPT SMP
[ 7.377468] Modules linked in:
[ 7.380550] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G W 4.19.0-rc6-00002-gea67197-dirty #877
[ 7.390308] Hardware name: Hisilicon Hip07 D05 Development Board (DT)
[ 7.396815] pstate: 20000005 (nzCv daif -PAN -UAO)
[ 7.401659] pc : __ll_sc_atomic_sub_return+0x4/0x20
[ 7.406585] lr : free_sched_groups.part.1+0x40/0x98
[ 7.411509] sp : ffff00000947bc40
[ 7.414851] x29: ffff00000947bc40 x28: ffff801fb4eae000
[ 7.420216] x27: 0000000000000010 x26: ffff000009119000
[ 7.425581] x25: 0000000000000010 x24: ffff801fb4e30000
[ 7.430946] x23: ffffffffffffe830 x22: 0000000000000001
[ 7.436311] x21: ffff801fb4e83000 x20: ffff801fb4eddf00
[ 7.441675] x19: ffff801fb4eddf80 x18: ffffffffffffffff
[ 7.447040] x17: 00000000ffffffff x16: 0000000000000000
[ 7.452405] x15: ffff0000091196c8 x14: ffff0000892746ef
[ 7.457770] x13: ffff0000092746fd x12: ffff000009119940
[ 7.463134] x11: ffff801fb62258b8 x10: 0000000000000001
[ 7.468499] x9 : ffff801fb49e4100 x8 : 000000000000000f
[ 7.473865] x7 : ffff801fb4d25700 x6 : 0000801ff2eea000
[ 7.479229] x5 : ffff0000091196f0 x4 : 0000000000000400
[ 7.484594] x3 : ffff801fb4edd000 x2 : ffff801fb4e83000
[ 7.489959] x1 : 0000000000000000 x0 : 0000000000000001
[ 7.495325] Process swapper/0 (pid: 1, stack limit = 0x(____ptrval____))
[ 7.502094] Call trace:
[ 7.504559] __ll_sc_atomic_sub_return+0x4/0x20
[ 7.509133] destroy_sched_domain+0x20/0x70
[ 7.513354] cpu_attach_domain+0xd8/0x688
[ 7.517401] build_sched_domains+0xd60/0xe38
[ 7.521709] sched_init_domains+0x6c/0x98
[ 7.525757] sched_init_smp+0x2c/0x7c
[ 7.529452] kernel_init_freeable+0xdc/0x244
[ 7.533762] kernel_init+0x10/0x108
[ 7.537281] ret_from_fork+0x10/0x18
[ 7.540888] Code: 88107c31 35ffffb0 d65f03c0 f9800031 (885f7c31)
[ 7.547113] ---[ end trace 137e0781b6e939ab ]---
[ 7.551789] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
[ 7.551789]
[ 7.561033] SMP: stopping secondary CPUs
[ 7.565010] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
[ 7.565010] ]---

I also note that if I apply the patch, below, to reject the invalid NUMA distance, we're still getting a warning/error:

[ 7.144407] CPU: All CPU(s) started at EL2
[ 7.148678] alternatives: patching kernel code
[ 7.153557] ERROR: Node-0 not representative
[ 7.153557]
[ 7.159365] 10 15 20 25
[ 7.162097] 15 10 25 30
[ 7.164832] 20 25 10 15
[ 7.167562] 25 30 15 10
[ 7.170296]
[ 7.175103] ERROR: groups don't span domain->span
[ 7.179929] ERROR: groups don't span domain->span
[ 7.184751] ERROR: groups don't span domain->span
[ 7.189572] ERROR: groups don't span domain->span
[ 7.194392] ERROR: groups don't span domain->span
[ 7.199212] ERROR: groups don't span domain->span
[ 7.204032] ERROR: groups don't span domain->span
[ 7.208851] ERROR: groups don't span domain->span
[ 7.213672] ERROR: groups don't span domain->span
[ 7.218492] ERROR: groups don't span domain->span
[ 7.223313] ERROR: groups don't span domain->span
[ 7.228133] ERROR: groups don't span domain->span
[ 7.232952] ERROR: groups don't span domain->span
[ 7.237773] ERROR: groups don't span domain->span
[ 7.242591] ERROR: groups don't span domain->span
[ 7.247412] ERROR: groups don't span domain->span
[ 7.252238] ERROR: groups don't span domain->span
[ 7.257063] ERROR: groups don't span domain->span
[ 7.261888] ERROR: groups don't span domain->span
[ 7.266712] ERROR: groups don't span domain->span
[ 7.271536] ERROR: groups don't span domain->span
[ 7.276361] ERROR: groups don't span domain->span
[ 7.281185] ERROR: groups don't span domain->span
[ 7.286010] ERROR: groups don't span domain->span
[ 7.290835] ERROR: groups don't span domain->span
[ 7.295659] ERROR: groups don't span domain->span
[ 7.300483] ERROR: groups don't span domain->span
[ 7.305307] ERROR: groups don't span domain->span
[ 7.310132] ERROR: groups don't span domain->span
[ 7.314957] ERROR: groups don't span domain->span
[ 7.319782] ERROR: groups don't span domain->span
[ 7.324609] ERROR: groups don't span domain->span
[ 7.329432] ERROR: groups don't span domain->span
[ 7.334254] ERROR: groups don't span domain->span
[ 7.339080] ERROR: groups don't span domain->span
[ 7.343903] ERROR: groups don't span domain->span
[ 7.348725] ERROR: groups don't span domain->span
[ 7.353547] ERROR: groups don't span domain->span
[ 7.358368] ERROR: groups don't span domain->span
[ 7.363191] ERROR: groups don't span domain->span
[ 7.368012] ERROR: groups don't span domain->span
[ 7.372835] ERROR: groups don't span domain->span
[ 7.377658] ERROR: groups don't span domain->span
[ 7.382480] ERROR: groups don't span domain->span
[ 7.387303] ERROR: groups don't span domain->span
[ 7.392124] ERROR: groups don't span domain->span
[ 7.396949] ERROR: groups don't span domain->span
[ 7.401771] ERROR: groups don't span domain->span
[ 7.406601] ERROR: groups don't span domain->span
[ 7.411428] ERROR: groups don't span domain->span
[ 7.416256] ERROR: groups don't span domain->span
[ 7.421086] ERROR: groups don't span domain->span
[ 7.425913] ERROR: groups don't span domain->span
[ 7.430740] ERROR: groups don't span domain->span
[ 7.435566] ERROR: groups don't span domain->span
[ 7.440393] ERROR: groups don't span domain->span
[ 7.445220] ERROR: groups don't span domain->span
[ 7.450047] ERROR: groups don't span domain->span
[ 7.454877] ERROR: groups don't span domain->span
[ 7.459705] ERROR: groups don't span domain->span
[ 7.464533] ERROR: groups don't span domain->span
[ 7.469361] ERROR: groups don't span domain->span
[ 7.474189] ERROR: groups don't span domain->span
[ 7.479016] ERROR: groups don't span domain->span
[ 7.483786] root domain span: 0-63 (max cpu_capacity = 1024)
[ 7.504868] devtmpfs: initialized
[ 7.510342] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns

John

However I am interested to know if the scheduler crash is a real
problem.

Ideally we'd not crash of course.. let me see if I can still make sense
of that topology code.

JFYI, https://lkml.org/lkml/2018/10/26/527

So it seems to be that setting the distance between separate nodes to
LOCAL_DISTANCE causes the problem. x86 NUMA code - like arm64 - allows
this. However ACPI SLIT validation rejects this, unlike OF distance map
parsing.

Thanks,
John

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