I tested on kernel 5.10.16 and came up with the same result as I did with kernel 5.11.6. dmesg output: [ 0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd034] [ 0.000000] Linux version 5.10.16-1-default (geeko@buildhost) (gcc (SUSE Linux) 10.2.1 20201202 [revision e563687cf9d3d1278f45aaebd03e0f66531076c9], GNU ld (GNU Binutils; openSUSE Tumbleweed) 2.35.1.20201112-1) #1 SMP Sat Feb 13 16:20:19 UTC 2021 (11381f3) [ 0.000000] Machine model: Raspberry Pi 3 Model B Rev 1.2 [ 0.000000] efi: EFI v2.80 by Das U-Boot [ 0.000000] efi: RTPROP=0x3cb28040 SMBIOS=0x3cb24000 MEMRESERVE=0x2a82a040 [ 0.000000] Reserved memory: created CMA memory pool at 0x0000000038800000, size 64 MiB [ 0.000000] OF: reserved mem: initialized node linux,cma, compatible id shared-dma-pool [ 0.000000] NUMA: No NUMA configuration found [ 0.000000] NUMA: Faking a node at [mem 0x0000000000000000-0x000000003dffffff] [ 0.000000] NUMA: NODE_DATA [mem 0x3ddd9480-0x3ddddfff] [ 0.000000] Zone ranges: [ 0.000000] DMA [mem 0x0000000000000000-0x000000003dffffff] [ 0.000000] DMA32 empty [ 0.000000] Normal empty [ 0.000000] Device empty [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x0000000000000000-0x000000003cb1bfff] [ 0.000000] node 0: [mem 0x000000003cb1c000-0x000000003cb22fff] [ 0.000000] node 0: [mem 0x000000003cb23000-0x000000003cb23fff] [ 0.000000] node 0: [mem 0x000000003cb24000-0x000000003cb24fff] [ 0.000000] node 0: [mem 0x000000003cb25000-0x000000003cb26fff] [ 0.000000] node 0: [mem 0x000000003cb27000-0x000000003cb2afff] [ 0.000000] node 0: [mem 0x000000003cb2b000-0x000000003cb2bfff] [ 0.000000] node 0: [mem 0x000000003cb2c000-0x000000003cb30fff] [ 0.000000] node 0: [mem 0x000000003cb31000-0x000000003cb31fff] [ 0.000000] node 0: [mem 0x000000003cb32000-0x000000003cb32fff] [ 0.000000] node 0: [mem 0x000000003cb33000-0x000000003cb33fff] [ 0.000000] node 0: [mem 0x000000003cb34000-0x000000003cb34fff] [ 0.000000] node 0: [mem 0x000000003cb35000-0x000000003cb35fff] [ 0.000000] node 0: [mem 0x000000003cb36000-0x000000003cb36fff] [ 0.000000] node 0: [mem 0x000000003cb37000-0x000000003cb38fff] [ 0.000000] node 0: [mem 0x000000003cb39000-0x000000003cb39fff] [ 0.000000] node 0: [mem 0x000000003cb3a000-0x000000003df3ffff] [ 0.000000] node 0: [mem 0x000000003df40000-0x000000003df4ffff] [ 0.000000] node 0: [mem 0x000000003df50000-0x000000003dffffff] [ 0.000000] Zeroed struct page in unavailable ranges: 37 pages [ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x000000003dffffff] [ 0.000000] On node 0 totalpages: 253952 [ 0.000000] DMA zone: 3968 pages used for memmap [ 0.000000] DMA zone: 0 pages reserved [ 0.000000] DMA zone: 253952 pages, LIFO batch:63 [ 0.000000] percpu: Embedded 33 pages/cpu s95000 r8192 d31976 u135168 [ 0.000000] pcpu-alloc: s95000 r8192 d31976 u135168 alloc=33*4096 [ 0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3 [ 0.000000] Detected VIPT I-cache on CPU0 [ 0.000000] CPU features: detected: ARM erratum 845719 [ 0.000000] CPU features: kernel page table isolation forced ON by KASLR [ 0.000000] CPU features: detected: Kernel page table isolation (KPTI) [ 0.000000] CPU features: detected: ARM erratum 843419 [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 249984 [ 0.000000] Policy zone: DMA [ 0.000000] Kernel command line: BOOT_IMAGE=/boot/Image-5.10.16-1-default root=UUID=9662fa64-c149-4230-97a1-b6855c52cdc6 splash=silent mitigations=auto quiet [ 0.000000] Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes, linear) [ 0.000000] Inode-cache hash table entries: 65536 (order: 7, 524288 bytes, linear) [ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off [ 0.000000] Memory: 871632K/1015808K available (13888K kernel code, 3386K rwdata, 9992K rodata, 6912K init, 9517K bss, 78640K reserved, 65536K cma-reserved) [ 0.000000] random: get_random_u64 called from __kmem_cache_create+0x3c/0x56c with crng_init=0 [ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1 [ 0.000000] ftrace: allocating 44467 entries in 174 pages [ 0.000000] ftrace: allocated 174 pages with 5 groups [ 0.000000] rcu: Hierarchical RCU implementation. [ 0.000000] rcu: RCU event tracing is enabled. [ 0.000000] rcu: RCU restricting CPUs from NR_CPUS=480 to nr_cpu_ids=4. [ 0.000000] Trampoline variant of Tasks RCU enabled. [ 0.000000] Rude variant of Tasks RCU enabled. [ 0.000000] Tracing variant of Tasks RCU enabled. [ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies. [ 0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4 [ 0.000000] NR_IRQS: 64, nr_irqs: 64, preallocated irqs: 0 [ 0.000000] arch_timer: cp15 timer(s) running at 19.20MHz (phys). [ 0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x46d987e47, max_idle_ns: 440795202767 ns [ 0.000008] sched_clock: 56 bits at 19MHz, resolution 52ns, wraps every 4398046511078ns [ 0.000530] Console: colour dummy device 80x25 [ 0.000594] printk: console [tty0] enabled [ 0.000753] Calibrating delay loop (skipped), value calculated using timer frequency.. 38.40 BogoMIPS (lpj=192000) [ 0.000773] pid_max: default: 32768 minimum: 301 [ 0.000935] LSM: Security Framework initializing [ 0.001077] AppArmor: AppArmor initialized [ 0.001317] Mount-cache hash table entries: 2048 (order: 2, 16384 bytes, linear) [ 0.001343] Mountpoint-cache hash table entries: 2048 (order: 2, 16384 bytes, linear) [ 0.004404] rcu: Hierarchical SRCU implementation. [ 0.008515] Remapping and enabling EFI services. [ 0.009159] smp: Bringing up secondary CPUs ... [ 5.042371] CPU1: failed to come online [ 5.042402] CPU1: failed in unknown state : 0x0 [ 10.084807] CPU2: failed to come online [ 10.084832] CPU2: failed in unknown state : 0x0 [ 15.127230] CPU3: failed to come online [ 15.127253] CPU3: failed in unknown state : 0x0 [ 15.127346] smp: Brought up 1 node, 1 CPU [ 15.127353] SMP: Total of 1 processors activated. [ 15.127368] CPU features: detected: 32-bit EL0 Support [ 15.127381] CPU features: detected: CRC32 instructions [ 15.127395] CPU features: detected: 32-bit EL1 Support [ 15.127631] CPU features: emulated: Privileged Access Never (PAN) using TTBR0_EL1 switching [ 15.151389] CPU: All CPU(s) started at EL2 [ 15.151489] alternatives: patching kernel code [ 15.154104] devtmpfs: initialized [ 15.165521] Registered cp15_barrier emulation handler [ 15.165543] Registered setend emulation handler [ 15.165558] KASLR enabled [ 15.166118] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns [ 15.166151] futex hash table entries: 1024 (order: 4, 65536 bytes, linear) [ 15.171251] pinctrl core: initialized pinctrl subsystem [ 15.173039] SMBIOS 3.0 present. [ 15.173057] DMI: /, BIOS 2021.01 03/04/2021