Greeting, FYI, we noticed the following commit (built with gcc-9): commit: acb5758bf41a116c65f7b3fdfd3d79b54ebfad9f ("[PATCH v2 1/3] mm,page_alloc: Use {get,put}_online_mems() to get stable zone's values") url: https://github.com/0day-ci/linux/commits/Oscar-Salvador/Memory-hotplug-lo... in testcase: boot on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +-----------------------------------------------------------------------------------+-----------+------------+ | | v5.13-rc4 | acb5758bf4 | +-----------------------------------------------------------------------------------+-----------+------------+ | boot_successes | 167 | 0 | | boot_failures | 0 | 6 | | BUG:sleeping_function_called_from_invalid_context_at_include/linux/percpu-rwsem.h | 0 | 6 | | WARNING:at_kernel/sched/core.c:#__might_sleep | 0 | 1 | | RIP:__might_sleep | 0 | 1 | | RIP:smpboot_thread_fn | 0 | 1 | +-----------------------------------------------------------------------------------+-----------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot <oliver.sang(a)intel.com&gt; [ 0.951423] BUG: sleeping function called from invalid context at include/linux/percpu-rwsem.h:49 [ 0.953745] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 2, name: kthreadd [ 0.953745] CPU: 0 PID: 2 Comm: kthreadd Not tainted 5.13.0-rc4-00001-gacb5758bf41a #1 [ 0.953745] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 0.953745] Call Trace: [ 0.953745] dump_stack (kbuild/src/consumer/lib/dump_stack.c:122) [ 0.953745] ___might_sleep (kbuild/src/consumer/kernel/sched/core.c:8339 kbuild/src/consumer/kernel/sched/core.c:8296) [ 0.953745] get_online_mems (kbuild/src/consumer/include/linux/percpu-rwsem.h:49 kbuild/src/consumer/mm/memory_hotplug.c:69) [ 0.953745] bad_range (kbuild/src/consumer/mm/page_alloc.c:589 kbuild/src/consumer/mm/page_alloc.c:617) [ 0.953745] expand (kbuild/src/consumer/mm/page_alloc.c:2231) [ 0.953745] rmqueue_bulk+0x161/0x359 [ 0.953745] __rmqueue_pcplist (kbuild/src/consumer/mm/page_alloc.c:3471 (discriminator 3)) [ 0.953745] rmqueue (kbuild/src/consumer/mm/page_alloc.c:3499 kbuild/src/consumer/mm/page_alloc.c:3527) [ 0.953745] ? __alloc_pages (kbuild/src/consumer/mm/page_alloc.c:5198) [ 0.953745] ? __cond_resched (kbuild/src/consumer/kernel/sched/core.c:6994) [ 0.953745] ? post_alloc_hook (kbuild/src/consumer/arch/x86/include/asm/atomic.h:29 kbuild/src/consumer/include/asm-generic/atomic-instrumented.h:28 kbuild/src/consumer/include/linux/jump_label.h:254 kbuild/src/consumer/include/linux/mm.h:2959 kbuild/src/consumer/mm/page_alloc.c:2345) [ 0.953745] get_page_from_freelist (kbuild/src/consumer/mm/page_alloc.c:3989) [ 0.953745] __alloc_pages (kbuild/src/consumer/mm/page_alloc.c:5198) [ 0.953745] __vmalloc_area_node+0x133/0x1fd [ 0.953745] __vmalloc_node_range (kbuild/src/consumer/mm/vmalloc.c:2916) [ 0.953745] copy_process (kbuild/src/consumer/kernel/fork.c:245 kbuild/src/consumer/kernel/fork.c:869 kbuild/src/consumer/kernel/fork.c:1947) [ 0.953745] ? kernel_clone (kbuild/src/consumer/kernel/fork.c:2503) [ 0.953745] kernel_clone (kbuild/src/consumer/kernel/fork.c:2503) [ 0.953745] kernel_thread (kbuild/src/consumer/kernel/fork.c:2556) [ 0.953745] ? kthread_flush_worker (kbuild/src/consumer/kernel/kthread.c:266) [ 0.953745] kthreadd (kbuild/src/consumer/kernel/kthread.c:337 kbuild/src/consumer/kernel/kthread.c:679) [ 0.953745] ? kthread_is_per_cpu (kbuild/src/consumer/kernel/kthread.c:652) [ 0.953745] ret_from_fork (kbuild/src/consumer/arch/x86/entry/entry_64.S:300) [ 0.954392] smp: Bringing up secondary CPUs ... [ 0.956051] x86: Booting SMP configuration: [ 0.957352] .... node #0, CPUs: #1 [ 0.181973] kvm-clock: cpu 1, msr 303a041, secondary cpu clock [ 0.181973] masked ExtINT on CPU#1 [ 0.181973] smpboot: CPU 1 Converting physical 0 to logical die 1 [ 0.965836] kvm-guest: stealtime: cpu 1, msr 42fd17200 [ 0.967437] smp: Brought up 1 node, 2 CPUs [ 0.969765] smpboot: Max logical packages: 2 [ 0.970961] smpboot: Total of 2 processors activated (9575.99 BogoMIPS) [ 0.974300] devtmpfs: initialized [ 0.975023] x86/mm: Memory block size: 128MB [ 0.982906] wait_for_initramfs() called before rootfs_initcalls [ 0.982977] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns [ 0.985774] futex hash table entries: 512 (order: 3, 32768 bytes, linear) [ 0.990745] NET: Registered protocol family 16 [ 0.993435] audit: initializing netlink subsys (disabled) [ 0.998316] thermal_sys: Registered thermal governor 'step_wise' [ 0.998322] thermal_sys: Registered thermal governor 'user_space' [ 0.998322] audit: type=2000 audit(1622678220.193:1): state=initialized audit_enabled=0 res=1 [ 1.004221] cpuidle: using governor ladder [ 1.004221] cpuidle: using governor menu [ 1.006848] ACPI: bus type PCI registered [ 1.008400] PCI: Using configuration type 1 for base access [ 1.035251] Kprobes globally optimized [ 1.037864] ACPI: Added _OSI(Module Device) [ 1.039172] ACPI: Added _OSI(Processor Device) [ 1.041772] ACPI: Added _OSI(3.0 _SCP Extensions) [ 1.043168] ACPI: Added _OSI(Processor Aggregator Device) [ 1.044705] ACPI: Added _OSI(Linux-Dell-Video) [ 1.045851] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio) [ 1.047408] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics) [ 1.050725] ACPI: 1 ACPI AML tables successfully acquired and loaded [ 1.054357] ACPI: Interpreter enabled [ 1.055555] ACPI: (supports S0 S3 S4 S5) [ 1.056759] ACPI: Using IOAPIC for interrupt routing [ 1.057923] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug [ 1.062087] ACPI: Enabled 2 GPEs in block 00 to 0F [ 1.072359] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff]) [ 1.073771] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI HPX-Type3] [ 1.076037] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge. [ 1.078069] PCI host bridge to bus 0000:00 [ 1.079325] pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7 window] [ 1.081220] pci_bus 0000:00: root bus resource [io 0x0d00-0xffff window] [ 1.081778] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window] [ 1.083994] pci_bus 0000:00: root bus resource [mem 0xc0000000-0xfebfffff window] [ 1.085761] pci_bus 0000:00: root bus resource [mem 0x440000000-0x4bfffffff window] [ 1.087961] pci_bus 0000:00: root bus resource [bus 00-ff] [ 1.089587] pci 0000:00:00.0: [8086:1237] type 00 class 0x060000 [ 1.090932] pci 0000:00:01.0: [8086:7000] type 00 class 0x060100 [ 1.093853] pci 0000:00:01.1: [8086:7010] type 00 class 0x010180 [ 1.101023] pci 0000:00:01.1: reg 0x20: [io 0xc040-0xc04f] [ 1.104173] pci 0000:00:01.1: legacy IDE quirk: reg 0x10: [io 0x01f0-0x01f7] [ 1.105768] pci 0000:00:01.1: legacy IDE quirk: reg 0x14: [io 0x03f6] [ 1.107592] pci 0000:00:01.1: legacy IDE quirk: reg 0x18: [io 0x0170-0x0177] [ 1.109448] pci 0000:00:01.1: legacy IDE quirk: reg 0x1c: [io 0x0376] [ 1.110306] pci 0000:00:01.3: [8086:7113] type 00 class 0x068000 [ 1.112295] pci 0000:00:01.3: quirk: [io 0x0600-0x063f] claimed by PIIX4 ACPI [ 1.113821] pci 0000:00:01.3: quirk: [io 0x0700-0x070f] claimed by PIIX4 SMB [ 1.116585] pci 0000:00:02.0: [1234:1111] type 00 class 0x030000 [ 1.120678] pci 0000:00:02.0: reg 0x10: [mem 0xfd000000-0xfdffffff pref] [ 1.125763] pci 0000:00:02.0: reg 0x18: [mem 0xfebf0000-0xfebf0fff] [ 1.135974] pci 0000:00:02.0: reg 0x30: [mem 0xfebe0000-0xfebeffff pref] [ 1.139173] pci 0000:00:03.0: [8086:100e] type 00 class 0x020000 [ 1.142567] pci 0000:00:03.0: reg 0x10: [mem 0xfebc0000-0xfebdffff] [ 1.145759] pci 0000:00:03.0: reg 0x14: [io 0xc000-0xc03f] [ 1.154798] pci 0000:00:03.0: reg 0x30: [mem 0xfeb80000-0xfebbffff pref] [ 1.157430] pci 0000:00:04.0: [8086:25ab] type 00 class 0x088000 [ 1.158615] pci 0000:00:04.0: reg 0x10: [mem 0xfebf1000-0xfebf100f] [ 1.167002] ACPI: PCI: Interrupt link LNKA configured for IRQ 10 [ 1.169426] ACPI: PCI: Interrupt link LNKB configured for IRQ 10 [ 1.169966] ACPI: PCI: Interrupt link LNKC configured for IRQ 11 [ 1.171809] ACPI: PCI: Interrupt link LNKD configured for IRQ 11 [ 1.173641] ACPI: PCI: Interrupt link LNKS configured for IRQ 9 [ 1.174661] iommu: Default domain type: Translated [ 1.176216] pci 0000:00:02.0: vgaarb: setting as boot VGA device [ 1.176216] pci 0000:00:02.0: vgaarb: VGA device added: decodes=io+mem,owns=io+mem,locks=none [ 1.177775] pci 0000:00:02.0: vgaarb: bridge control possible [ 1.179446] vgaarb: loaded [ 1.180958] SCSI subsystem initialized [ 1.182073] libata version 3.00 loaded. [ 1.183554] ACPI: bus type USB registered [ 1.184998] usbcore: registered new interface driver usbfs [ 1.185927] usbcore: registered new interface driver hub [ 1.187467] usbcore: registered new device driver usb [ 1.189271] pps_core: LinuxPPS API ver. 1 registered [ 1.189755] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti(a)linux.it&gt; [ 1.192502] PTP clock support registered [ 1.194111] Advanced Linux Sound Architecture Driver Initialized. [ 1.196236] PCI: Using ACPI for IRQ routing [ 1.197766] PCI: pci_cache_line_size set to 64 bytes [ 1.199350] e820: reserve RAM buffer [mem 0x0009fc00-0x0009ffff] [ 1.201032] e820: reserve RAM buffer [mem 0xbffe0000-0xbfffffff] [ 1.202909] clocksource: Switched to clocksource kvm-clock [ 1.314382] VFS: Disk quotas dquot_6.6.0 [ 1.315518] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes) [ 1.317540] pnp: PnP ACPI init [ 1.318663] pnp 00:00: Plug and Play ACPI device, IDs PNP0b00 (active) [ 1.324095] pnp 00:01: Plug and Play ACPI device, IDs PNP0303 (active) [ 1.326382] pnp 00:02: Plug and Play ACPI device, IDs PNP0f13 (active) [ 1.328128] pnp 00:03: [dma 2] [ 1.329228] pnp 00:03: Plug and Play ACPI device, IDs PNP0700 (active) [ 1.331299] pnp 00:04: Plug and Play ACPI device, IDs PNP0400 (active) [ 1.333537] pnp 00:05: Plug and Play ACPI device, IDs PNP0501 (active) [ 1.335853] pnp 00:06: Plug and Play ACPI device, IDs PNP0501 (active) [ 1.338038] pnp: PnP ACPI: found 7 devices [ 1.351709] clocksource: acpi_pm: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 2085701024 ns [ 1.358348] NET: Registered protocol family 2 [ 1.360864] IP idents hash table entries: 262144 (order: 9, 2097152 bytes, linear) [ 1.367631] tcp_listen_portaddr_hash hash table entries: 8192 (order: 5, 131072 bytes, linear) [ 1.370180] TCP established hash table entries: 131072 (order: 8, 1048576 bytes, linear) [ 1.372947] TCP bind hash table entries: 65536 (order: 8, 1048576 bytes, linear) [ 1.376215] TCP: Hash tables configured (established 131072 bind 65536) [ 1.378753] UDP hash table entries: 8192 (order: 6, 262144 bytes, linear) [ 1.380713] UDP-Lite hash table entries: 8192 (order: 6, 262144 bytes, linear) [ 1.382999] NET: Registered protocol family 1 [ 1.388371] RPC: Registered named UNIX socket transport module. [ 1.390098] RPC: Registered udp transport module. [ 1.391490] RPC: Registered tcp transport module. [ 1.392898] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 1.394621] pci_bus 0000:00: resource 4 [io 0x0000-0x0cf7 window] [ 1.396328] pci_bus 0000:00: resource 5 [io 0x0d00-0xffff window] [ 1.398062] pci_bus 0000:00: resource 6 [mem 0x000a0000-0x000bffff window] To reproduce: # build kernel cd linux cp config-5.13.0-rc4-00001-gacb5758bf41a .config make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang