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Date: Fri, 12 Feb 2021 13:54:28 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: Valentin Schneider <valentin.schneider@....com>,
LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
lkp@...el.com, aubrey.li@...ux.intel.com, yu.c.chen@...el.com
Subject: [sched] 975707f227: WARNING:at_kernel/sched/core.c:#balance_push
Greeting,
FYI, we noticed the following commit (built with gcc-9):
commit: 975707f227b07a8212060f94447171d15d7a681b ("sched: Prepare to use balance_push in ttwu()")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
in testcase: rcutorture
version:
with following parameters:
runtime: 300s
test: cpuhotplug
torture_type: srcu
test-description: rcutorture is rcutorture kernel module load/unload test.
test-url: https://www.kernel.org/doc/Documentation/RCU/torture.txt
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):
+-------------------------------------------------+------------+------------+
| | 640f17c824 | 975707f227 |
+-------------------------------------------------+------------+------------+
| WARNING:at_kernel/sched/core.c:#sched_cpu_dying | 6 | 6 |
| RIP:sched_cpu_dying | 6 | 6 |
| WARNING:at_kernel/sched/core.c:#balance_push | 0 | 4 |
| RIP:balance_push | 0 | 4 |
+-------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>
[ 283.239704] WARNING: CPU: 0 PID: 15 at kernel/sched/core.c:7270 balance_push (kbuild/src/consumer/kernel/sched/core.c:7270)
[ 283.240927] Modules linked in: rcutorture torture
[ 283.241410] CPU: 0 PID: 15 Comm: rcub/0 Tainted: G W 5.11.0-rc3-00008-g975707f227b0 #1
[ 283.242335] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 283.243174] RIP: 0010:balance_push (kbuild/src/consumer/kernel/sched/core.c:7270)
[ 283.243622] Code: ac b9 48 83 05 13 be 00 04 01 c6 05 a0 59 d4 03 01 e8 2f 79 12 00 48 c7 c7 0d dd 10 b9 48 83 05 d0 bd 00 04 01 e8 2e b0 c4 01 <0f> 0b b9 01 00 00 00 31 d2 be 01 00 00 00 48 c7 c7 60 1f ac b9 e8
All code
========
0: ac lods %ds:(%rsi),%al
1: b9 48 83 05 13 mov $0x13058348,%ecx
6: be 00 04 01 c6 mov $0xc6010400,%esi
b: 05 a0 59 d4 03 add $0x3d459a0,%eax
10: 01 e8 add %ebp,%eax
12: 2f (bad)
13: 79 12 jns 0x27
15: 00 48 c7 add %cl,-0x39(%rax)
18: c7 (bad)
19: 0d dd 10 b9 48 or $0x48b910dd,%eax
1e: 83 05 d0 bd 00 04 01 addl $0x1,0x400bdd0(%rip) # 0x400bdf5
25: e8 2e b0 c4 01 callq 0x1c4b058
2a:* 0f 0b ud2 <-- trapping instruction
2c: b9 01 00 00 00 mov $0x1,%ecx
31: 31 d2 xor %edx,%edx
33: be 01 00 00 00 mov $0x1,%esi
38: 48 c7 c7 60 1f ac b9 mov $0xffffffffb9ac1f60,%rdi
3f: e8 .byte 0xe8
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: b9 01 00 00 00 mov $0x1,%ecx
7: 31 d2 xor %edx,%edx
9: be 01 00 00 00 mov $0x1,%esi
e: 48 c7 c7 60 1f ac b9 mov $0xffffffffb9ac1f60,%rdi
15: e8 .byte 0xe8
[ 283.245436] RSP: 0018:ffff95e54046fcf0 EFLAGS: 00010086
[ 283.245977] RAX: 000000000000001d RBX: 0000000000000001 RCX: 0000000000000000
[ 283.246678] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb9ad08a0
[ 283.247378] RBP: ffff95e54046fd10 R08: 0000000000000000 R09: ffff95e54046fb38
[ 283.248104] R10: 0000000000000001 R11: 0000000000000001 R12: ffff95e67fd2a240
[ 283.248806] R13: ffff95e544164000 R14: 0000000000000001 R15: ffff95e544164000
[ 283.249514] FS: 0000000000000000(0000) GS:ffff95e67fc00000(0000) knlGS:0000000000000000
[ 283.250307] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 283.250876] CR2: 00007fdfc891f000 CR3: 0000000193464000 CR4: 00000000000406b0
[ 283.251581] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 283.252300] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 283.253002] Call Trace:
[ 283.253263] do_balance_callbacks (kbuild/src/consumer/kernel/sched/core.c:3978)
[ 283.253697] rt_mutex_setprio (kbuild/src/consumer/kernel/sched/core.c:5486)
[ 283.254103] task_blocks_on_rt_mutex (kbuild/src/consumer/kernel/locking/rtmutex.c:974 (discriminator 1))
[ 283.254570] rt_mutex_slowlock (kbuild/src/consumer/kernel/locking/rtmutex.c:1262)
[ 283.254995] ? rcu_boost_kthread (kbuild/src/consumer/kernel/rcu/tree_plugin.h:1052 (discriminator 33))
[ 283.255425] rcu_boost_kthread (kbuild/src/consumer/kernel/rcu/tree_plugin.h:1033 kbuild/src/consumer/kernel/rcu/tree_plugin.h:1056)
[ 283.255840] ? trace_rcu_utilization (kbuild/src/consumer/kernel/rcu/tree_plugin.h:1043)
[ 283.256301] kthread (kbuild/src/consumer/kernel/kthread.c:292 (discriminator 1))
[ 283.256637] ? kthread_bind (kbuild/src/consumer/kernel/kthread.c:245)
[ 283.257010] ret_from_fork (kbuild/src/consumer/arch/x86/entry/entry_64.S:302)
[ 283.257379] ---[ end trace c38942c9fa7558e1 ]---
[ 283.277895] numa_remove_cpu cpu 1 node 0: mask now 0
[ 283.280276] smpboot: CPU 1 is now offline
[ 283.293951] x86: Booting SMP configuration:
[ 283.294391] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 283.330746] kvm-clock: cpu 1, msr 196b0e041, secondary cpu clock
[ 283.330843] masked ExtINT on CPU#1
[ 283.331965] numa_add_cpu cpu 1 node 0: mask now 0-1
[ 283.336608] kvm-guest: stealtime: cpu 1, msr 23fd16b80
[ 283.375484] numa_remove_cpu cpu 1 node 0: mask now 0
[ 283.378071] smpboot: CPU 1 is now offline
[ 283.393976] x86: Booting SMP configuration:
[ 283.394428] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 283.412639] kvm-clock: cpu 1, msr 196b0e041, secondary cpu clock
[ 283.412745] masked ExtINT on CPU#1
[ 283.413871] numa_add_cpu cpu 1 node 0: mask now 0-1
[ 283.418373] kvm-guest: stealtime: cpu 1, msr 23fd16b80
[ 283.491884] numa_remove_cpu cpu 1 node 0: mask now 0
[ 283.495272] smpboot: CPU 1 is now offline
[ 283.525983] x86: Booting SMP configuration:
[ 283.526425] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 283.544712] kvm-clock: cpu 1, msr 196b0e041, secondary cpu clock
[ 283.544813] masked ExtINT on CPU#1
[ 283.545940] numa_add_cpu cpu 1 node 0: mask now 0-1
[ 283.550440] kvm-guest: stealtime: cpu 1, msr 23fd16b80
[ 283.666301] numa_remove_cpu cpu 1 node 0: mask now 0
[ 283.669641] smpboot: CPU 1 is now offline
[ 283.701933] x86: Booting SMP configuration:
[ 283.702380] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 283.719844] kvm-clock: cpu 1, msr 196b0e041, secondary cpu clock
[ 283.719943] masked ExtINT on CPU#1
[ 283.721076] numa_add_cpu cpu 1 node 0: mask now 0-1
[ 283.726187] kvm-guest: stealtime: cpu 1, msr 23fd16b80
[ 283.817853] numa_remove_cpu cpu 1 node 0: mask now 0
[ 283.821126] smpboot: CPU 1 is now offline
[ 283.854019] x86: Booting SMP configuration:
[ 283.854468] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 283.871618] kvm-clock: cpu 1, msr 196b0e041, secondary cpu clock
[ 283.871719] masked ExtINT on CPU#1
[ 283.872839] numa_add_cpu cpu 1 node 0: mask now 0-1
[ 283.878038] kvm-guest: stealtime: cpu 1, msr 23fd16b80
[ 283.942215] numa_remove_cpu cpu 1 node 0: mask now 0
[ 283.945485] smpboot: CPU 1 is now offline
[ 283.961956] x86: Booting SMP configuration:
[ 283.962404] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 283.984487] kvm-clock: cpu 1, msr 196b0e041, secondary cpu clock
[ 283.984600] masked ExtINT on CPU#1
[ 283.986305] numa_add_cpu cpu 1 node 0: mask now 0-1
[ 283.990226] kvm-guest: stealtime: cpu 1, msr 23fd16b80
[ 284.051485] numa_remove_cpu cpu 1 node 0: mask now 0
[ 284.055360] smpboot: CPU 1 is now offline
[ 284.117950] x86: Booting SMP configuration:
[ 284.118401] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 284.139186] kvm-clock: cpu 1, msr 196b0e041, secondary cpu clock
[ 284.139326] masked ExtINT on CPU#1
[ 284.142223] numa_add_cpu cpu 1 node 0: mask now 0-1
[ 284.146683] kvm-guest: stealtime: cpu 1, msr 23fd16b80
[ 284.195744] numa_remove_cpu cpu 1 node 0: mask now 0
[ 284.199466] smpboot: CPU 1 is now offline
[ 284.261983] x86: Booting SMP configuration:
[ 284.262432] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 284.318185] kvm-clock: cpu 1, msr 196b0e041, secondary cpu clock
[ 284.318314] masked ExtINT on CPU#1
[ 284.320303] numa_add_cpu cpu 1 node 0: mask now 0-1
[ 284.326091] kvm-guest: stealtime: cpu 1, msr 23fd16b80
[ 284.373794] numa_remove_cpu cpu 1 node 0: mask now 0
[ 284.377273] smpboot: CPU 1 is now offline
[ 284.397079] x86: Booting SMP configuration:
[ 284.397597] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 284.426089] kvm-clock: cpu 1, msr 196b0e041, secondary cpu clock
[ 284.426213] masked ExtINT on CPU#1
[ 284.428166] numa_add_cpu cpu 1 node 0: mask now 0-1
[ 284.434347] kvm-guest: stealtime: cpu 1, msr 23fd16b80
[ 284.542180] numa_remove_cpu cpu 1 node 0: mask now 0
[ 284.545736] smpboot: CPU 1 is now offline
[ 284.561643] x86: Booting SMP configuration:
[ 284.562086] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 284.590505] kvm-clock: cpu 1, msr 196b0e041, secondary cpu clock
[ 284.590616] masked ExtINT on CPU#1
[ 284.592263] numa_add_cpu cpu 1 node 0: mask now 0-1
[ 284.600268] kvm-guest: stealtime: cpu 1, msr 23fd16b80
[ 284.671227] numa_remove_cpu cpu 1 node 0: mask now 0
[ 284.675079] smpboot: CPU 1 is now offline
[ 284.769629] x86: Booting SMP configuration:
[ 284.770076] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 284.798746] kvm-clock: cpu 1, msr 196b0e041, secondary cpu clock
[ 284.798867] masked ExtINT on CPU#1
[ 284.800831] numa_add_cpu cpu 1 node 0: mask now 0-1
[ 284.811787] kvm-guest: stealtime: cpu 1, msr 23fd16b80
[ 284.871512] numa_remove_cpu cpu 1 node 0: mask now 0
[ 284.876527] smpboot: CPU 1 is now offline
[ 284.891570] x86: Booting SMP configuration:
[ 284.892098] smpboot: Booting Node 0 Processor 1 APIC 0x1
[ 284.926141] kvm-clock: cpu 1, msr 196b0e041, secondary cpu clock
[ 284.926286] masked ExtINT on CPU#1
To reproduce:
# build kernel
cd linux
cp config-5.11.0-rc3-00008-g975707f227b0 .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,
Oliver Sang
View attachment "config-5.11.0-rc3-00008-g975707f227b0" of type "text/plain" (145267 bytes)
View attachment "job-script" of type "text/plain" (4282 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (62748 bytes)
View attachment "rcutorture" of type "text/plain" (7176 bytes)
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