Greeting, FYI, we noticed the following commit (built with gcc-9): commit: 25d95d0623751d029c3177527d44563040ae828b ("sched: Make migrate_disable/enable() independent of RT") https://git.kernel.org/cgit/linux/kernel/git/tglx/devel.git highmem in testcase: boot on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +-------------------------------------------------------+------------+------------+ | | c321556668 | 25d95d0623 | +-------------------------------------------------------+------------+------------+ | boot_successes | 4 | 0 | | boot_failures | 0 | 4 | | BUG:assuming_atomic_context_at_include/linux/filter.h | 0 | 4 | +-------------------------------------------------------+------------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot <lkp(a)intel.com&gt; [ 9.819373] BUG: assuming atomic context at include/linux/filter.h:597 [ 9.820843] in_atomic(): 0, irqs_disabled(): 0, pid: 156, name: (journald) [ 9.822369] CPU: 1 PID: 156 Comm: (journald) Not tainted 5.9.0-rc6-00010-g25d95d0623751 #1 [ 9.824286] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 9.826275] Call Trace: [ 9.826998] dump_stack+0x57/0x80 [ 9.827909] __cant_sleep.cold+0x68/0x75 [ 9.828932] __seccomp_filter+0x7e/0x680 [ 9.829876] syscall_trace_enter+0x83/0x1e0 [ 9.830892] do_syscall_64+0xf/0x40 [ 9.831719] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 9.832868] RIP: 0033:0x7fc1402c6f59 [ 9.833730] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 07 6f 0c 00 f7 d8 64 89 01 48 [ 9.837478] RSP: 002b:00007ffd5ecb9488 EFLAGS: 00000246 ORIG_RAX: 000000000000013d [ 9.839240] RAX: ffffffffffffffda RBX: 0000561bf42ee750 RCX: 00007fc1402c6f59 [ 9.840827] RDX: 0000561bf42ee750 RSI: 0000000000000000 RDI: 0000000000000001 [ 9.842247] RBP: 0000561bf434d700 R08: 0000561bf42f5970 R09: 00000000c000003e [ 9.843799] R10: 0000561bf42f59d0 R11: 0000000000000246 R12: 00007ffd5ecb94e0 [ 9.845242] R13: 00007ffd5ecb94d8 R14: 00007fc1400f7818 R15: 000000000000002c [ OK ] Started Load Kernel Modules. Mounting Kernel Configuration File System... Starting Apply Kernel Variables... [ OK ] Started Apply Kernel Variables. [ OK ] Mounted Kernel Configuration File System. [ OK ] Started Remount Root and Kernel File Systems. Starting Create System Users... Starting Load/Save Random Seed... [ OK ] Started Create System Users. Starting Create Static Device Nodes in /dev... [ OK ] Started Load/Save Random Seed. [ OK ] Started Create Static Device Nodes in /dev. Starting udev Kernel Device Manager... [ OK ] Reached target Local File Systems (Pre). [ OK ] Reached target Local File Systems. Starting Preprocess NFS configuration... [ OK ] Started udev Kernel Device Manager. [ OK ] Started Preprocess NFS configuration. [ OK ] Reached target NFS client services. [ OK ] Started Journal Service. Starting Flush Journal to Persistent Storage... [ OK ] Started udev Coldplug all Devices. Starting Helper to synchronize boot up for ifupdown... [ OK ] Started Flush Journal to Persistent Storage. [ OK ] Started Helper to synchronize boot up for ifupdown. Starting Raise network interfaces... Starting Create Volatile Files and Directories... [ OK ] Started Raise network interfaces. [ OK ] Reached target Network. [ OK ] Started Create Volatile Files and Directories. Starting Update UTMP about System Boot/Shutdown... Starting Network Time Synchronization... Starting RPC bind portmap service... [ OK ] Started RPC bind portmap service. [ OK ] Started Update UTMP about System Boot/Shutdown. [ OK ] Reached target Remote File Systems (Pre). [ OK ] Reached target Remote File Systems. [ OK ] Reached target RPC Port Mapper. [ 10.337714] piix4_smbus 0000:00:01.3: SMBus Host Controller at 0x700, revision 0 [ 10.450838] libata version 3.00 loaded. [ OK ] Started Network Time Synchronization. [ OK ] Reached target System Initialization. [ OK ] Listening on D-Bus System Message Bus Socket. [ OK ] Reached target Sockets. [ OK ] Reached target Basic System. Starting LKP bootstrap... Starting Permit User Sessions... [ OK ] Started D-Bus System Message Bus. Starting System Logging Service... Starting Login Service... [ 10.531472] parport_pc 00:04: reported by Plug and Play ACPI Starting /etc/rc.local Compatibility... [ 10.537909] parport0: PC-style at 0x378, irq 7 [PCSPP,TRISTATE] Starting OpenBSD Secure Shell server... [ OK ] Started Regular background program processing daemon. Starting LSB: OpenIPMI Driver init script... [ OK ] Started Daily Cleanup of Temporary Directories. [ OK ] Reached target System Time Synchronized. [ OK ] Started Daily rotation of log files. [ OK ] Started Daily apt download activities. [ OK ] Started Daily apt upgrade and clean activities. [ OK ] Reached target Timers. [ OK ] Started System Logging Service. [ OK ] Started LKP bootstrap. [ OK ] Started Permit User Sessions. [ 10.757740] ata_piix 0000:00:01.1: version 2.13 [ 10.820897] BUG: assuming atomic context at include/linux/filter.h:597 [ 10.824958] in_atomic(): 0, irqs_disabled(): 0, pid: 189, name: systemd-udevd [ 10.826545] CPU: 0 PID: 189 Comm: systemd-udevd Tainted: G W 5.9.0-rc6-00010-g25d95d0623751 #1 [ 10.828636] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 10.830631] Call Trace: [ 10.831348] dump_stack+0x57/0x80 [ 10.832253] __cant_sleep.cold+0x68/0x75 [ 10.833228] __seccomp_filter+0x7e/0x680 [ 10.834143] ? __switch_to_asm+0x42/0x70 [ 10.835154] syscall_trace_enter+0x83/0x1e0 [ 10.836505] do_syscall_64+0xf/0x40 [ 10.837349] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 10.838368] RIP: 0033:0x7f31b4f36fd7 [ 10.839137] Code: 48 83 ec 80 5b 5d 41 5c c3 66 2e 0f 1f 84 00 00 00 00 00 b8 ff ff ff ff eb d6 e8 e4 07 02 00 0f 1f 40 00 b8 5f 00 00 00 0f 05 <c3> 0f 1f 84 00 00 00 00 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff [ 10.842410] RSP: 002b:00007fff9f8539f8 EFLAGS: 00000206 ORIG_RAX: 000000000000005f [ 10.843757] RAX: ffffffffffffffda RBX: 0000559f0874b960 RCX: 00007f31b4f36fd7 [ 10.845012] RDX: 00000000000800c2 RSI: 0000559f0874b960 RDI: 0000000000000012 [ 10.846208] RBP: 00007fff9f853a80 R08: 0000000000000016 R09: 0000559f0874b97c [ 10.847426] R10: 0000000000000180 R11: 0000000000000206 R12: 00007fff9f853a78 [ 10.848608] R13: 00007fff9f853a4f R14: 0000000000000012 R15: 0000000000000006 Starting LSB: Load kernel image with kexec... [ OK ] Started LSB: Load kernel image with kexec. [ 10.893602] scsi host0: ata_piix [ 10.896952] IPMI message handler: version 39.2 [ 10.905583] ipmi device interface [ OK ] Started Login Service. LKP: HOSTNAME vm-snb-11, MAC 52:54:00:12:34:56, kernel 5.9.0-rc6-00010-g25d95d0623751 1, serial console /dev/ttyS0 [ 10.920625] scsi host1: ata_piix [ 10.921689] ata1: PATA max MWDMA2 cmd 0x1f0 ctl 0x3f6 bmdma 0xc040 irq 14 [ 10.923123] ata2: PATA max MWDMA2 cmd 0x170 ctl 0x376 bmdma 0xc048 irq 15 [ 10.985404] ipmi_si: IPMI System Interface driver [ 10.986829] ipmi_si: Unable to find any System Interface(s) [FAILED] Failed to start LSB: OpenIPMI Driver init script. See 'systemctl status openipmi.service' for details. [ 11.090976] ata2.01: NODEV after polling detection [ 11.096434] ata2.00: ATAPI: QEMU DVD-ROM, 2.5+, max UDMA/100 [ 11.099079] scsi 1:0:0:0: CD-ROM QEMU QEMU DVD-ROM 2.5+ PQ: 0 ANSI: 5 [ 11.120492] ppdev: user-space parallel port driver [ 11.193498] scsi 1:0:0:0: Attached scsi generic sg0 type 5 [ 11.261908] sr 1:0:0:0: [sr0] scsi3-mmc drive: 4x/4x cd/rw xa/form2 tray [ 11.263319] cdrom: Uniform CD-ROM driver Revision: 3.20 [ 11.273346] sr 1:0:0:0: Attached scsi CD-ROM sr0 [ 11.291046] bochs-drm 0000:00:02.0: vgaarb: deactivate vga console [ 11.302594] Console: switching to colour dummy device 80x25 [ 11.304468] [drm] Found bochs VGA, ID 0xb0c0. [ 11.305151] [drm] Framebuffer size 16384 kB @ 0xfd000000, mmio @ 0xfebf0000. [ 11.309645] [TTM] Zone kernel: Available graphics memory: 4074508 KiB [ 11.310875] [TTM] Zone dma32: Available graphics memory: 2097152 KiB [ 11.311998] [TTM] Initializing pool allocator [ 11.313245] [TTM] Initializing DMA pool allocator [ 11.314735] [drm] Initialized bochs-drm 1.0.0 20130925 for 0000:00:02.0 on minor 0 [ 11.319970] fbcon: bochs-drmdrmfb (fb0) is primary device [ 11.336008] Console: switching to colour frame buffer device 128x48 [ 11.345721] bochs-drm 0000:00:02.0: [drm] fb0: bochs-drmdrmfb frame buffer device [ 12.108197] BUG: assuming atomic context at include/linux/filter.h:597 [ 12.112588] in_atomic(): 0, irqs_disabled(): 0, pid: 223, name: systemd-logind [ 12.113809] CPU: 0 PID: 223 Comm: systemd-logind Tainted: G W 5.9.0-rc6-00010-g25d95d0623751 #1 [ 12.113810] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 12.113811] Call Trace: [ 12.113822] dump_stack+0x57/0x80 [ 12.117718] __seccomp_filter+0x7e/0x680 [ 12.118367] ? ep_poll+0x1e9/0x4e0 [ 12.118958] syscall_trace_enter+0x83/0x1e0 [ 12.119783] do_syscall_64+0xf/0x40 [ 12.120371] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 12.121214] RIP: 0033:0x7fc0b76567b4 [ 12.121807] Code: 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b1 0f 1f 80 00 00 00 00 48 8d 05 49 5f 0c 00 8b 00 85 c0 75 13 b8 2f 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 54 c3 0f 1f 00 41 54 41 89 d4 55 48 89 f5 53 [ 12.126243] RSP: 002b:00007ffe31fc6ca8 EFLAGS: 00000246 ORIG_RAX: 000000000000002f [ 12.127517] RAX: ffffffffffffffda RBX: 000055a169cb2e30 RCX: 00007fc0b76567b4 [ 12.128510] RDX: 0000000040000040 RSI: 00007ffe31fc6ce0 RDI: 000000000000000e [ 12.129450] RBP: 00007ffe31fc6cd0 R08: 0000000000b69f94 R09: 000000000000000b [ 12.130617] R10: 00007ffe31fec000 R11: 0000000000000246 R12: 00007ffe31fc6cc8 [ 12.131809] R13: 000055a169cb2e30 R14: 0000000000000000 R15: 0000000000000000 9mPreprocess NFS configuration... [ OK ] Reached target Host and Network Name Lookups. [ OK ] Started Preprocess NFS configuration. Starting NFS status monitor for NFSv2/3 locking.... Starting Notify NFS peers of a restart... [ OK ] Started Notify NFS peers of a restart. [ OK ] Started NFS status monitor for NFSv2/3 locking.. [ 12.284556] random: crng init done [ 12.286119] random: 7 urandom warning(s) missed due to ratelimiting [ OK ] Started OpenBSD Secure Shell server. [ 15.538606] BUG: assuming atomic context at include/linux/filter.h:597 [ 15.541153] in_atomic(): 0, irqs_disabled(): 0, pid: 165, name: systemd-udevd [ 15.543729] CPU: 0 PID: 165 Comm: systemd-udevd Tainted: G W 5.9.0-rc6-00010-g25d95d0623751 #1 [ 15.546685] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 15.549225] Call Trace: [ 15.550836] dump_stack+0x57/0x80 [ 15.552645] __cant_sleep.cold+0x68/0x75 [ 15.554421] __seccomp_filter+0x7e/0x680 [ 15.556343] ? ep_poll+0x1e9/0x4e0 [ 15.558116] syscall_trace_enter+0x83/0x1e0 [ 15.560069] do_syscall_64+0xf/0x40 [ 15.561873] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 15.568005] RIP: 0033:0x7f31b4f37461 [ 15.569862] Code: fe ff ff 50 48 8d 3d fe d0 09 00 e8 e9 03 02 00 66 0f 1f 84 00 00 00 00 00 48 8d 05 99 62 0d 00 8b 00 85 c0 75 13 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 57 c3 66 0f 1f 44 00 00 41 54 49 89 d4 55 48 [ 15.575428] RSP: 002b:00007fff9f853e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 15.577996] RAX: ffffffffffffffda RBX: 0000559f08744db8 RCX: 00007f31b4f37461 [ 15.580609] RDX: 0000000000000008 RSI: 00007fff9f853e70 RDI: 000000000000000d [ 15.582964] RBP: 00007fff9f854000 R08: 0000000000eaf7a2 R09: 000000000000000f [ 15.585537] R10: 00007fff9f9a1000 R11: 0000000000000246 R12: 00007fff9f853e90 [ 15.587966] R13: 0000559f08744da0 R14: 0000000000000001 R15: 00007fff9f853e9c [ 20.538604] BUG: assuming atomic context at include/linux/filter.h:597 [ 20.541188] in_atomic(): 0, irqs_disabled(): 0, pid: 209, name: systemd-timesyn [ 20.543554] CPU: 0 PID: 209 Comm: systemd-timesyn Tainted: G W 5.9.0-rc6-00010-g25d95d0623751 #1 [ 20.546364] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 20.548822] Call Trace: [ 20.550416] dump_stack+0x57/0x80 [ 20.552250] __cant_sleep.cold+0x68/0x75 [ 20.554054] __seccomp_filter+0x7e/0x680 [ 20.555920] ? ep_poll+0x1e9/0x4e0 [ 20.557705] syscall_trace_enter+0x83/0x1e0 [ 20.559641] do_syscall_64+0xf/0x40 [ 20.561222] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 20.563248] RIP: 0033:0x7fe472a8f494 [ 20.573230] Code: 66 0f 1f 44 00 00 41 54 49 89 d4 55 48 89 f5 53 89 fb 48 83 ec 10 e8 cb c2 01 00 4c 89 e2 48 89 ee 89 df 41 89 c0 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 48 89 44 24 08 e8 07 c3 01 00 48 [ 20.578771] RSP: 002b:00007fff46f52e10 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 20.581396] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 00007fe472a8f494 [ 20.583703] RDX: 0000000000000008 RSI: 00007fff46f52e40 RDI: 0000000000000010 [ 20.585996] RBP: 00007fff46f52e40 R08: 0000000000000000 R09: 0000000000000014 [ 20.588598] R10: 00007fff46f6a000 R11: 0000000000000246 R12: 0000000000000008 [ 20.590957] R13: 0000000000000001 R14: 00007fff46f52e6c R15: 00007fff46f52e60 [ 23.728449] sysrq: Emergency Sync [ 23.731860] BUG: assuming atomic context at include/linux/filter.h:597 [ 23.732416] Emergency Sync complete [ 23.734323] in_atomic(): 0, irqs_disabled(): 0, pid: 156, name: systemd-journal [ 23.736313] sysrq: Resetting [ Kboot worker: lkp-worker47 Elapsed time: 60 kvm=( qemu-system-x86_64 -enable-kvm -cpu SandyBridge -kernel $kernel -initrd initrd-vm-snb-11.cgz -m 8192 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0,hostfwd=tcp::32032-:22 -boot order=nc -no-reboot -watchdog i6300esb -watchdog-action debug -rtc base=localtime -serial stdio -display none -monitor null ) append=( ip=::::vm-snb-11::dhcp root=/dev/ram0 user=lkp job=/job-script ARCH=x86_64 kconfig=x86_64-rhel-8.3 branch=tglx-devel/highmem commit=25d95d0623751d029c3177527d44563040ae828b BOOT_IMAGE=/pkg/linux/x86_64-rhel-8.3/gcc-9/25d95d0623751d029c3177527d44563040ae828b/vmlinuz-5.9.0-rc6-00010-g25d95d0623751 max_uptime=600 RESULT_ROOT=/result/boot/1/vm-snb/debian-10.4-x86_64-20200603.cgz/x86_64-rhel-8.3/gcc-9/25d95d0623751d029c3177527d44563040ae828b/3 result_service=tmpfs selinux=0 debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 net.ifnames=0 printk.devkmsg=on panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 drbd.minor_count=8 systemd.log_level=err ignore_loglevel console=tty0 earlyprintk=ttyS0,115200 console=ttyS0,115200 vga=normal rw rcuperf.shutdown=0 watchdog_thresh=60 ) "${kvm[@]}" -append "${append[*]}" To reproduce: # build kernel cd linux cp config-5.9.0-rc6-00010-g25d95d0623751 .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 Thanks, lkp