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Message-ID: <202410141238.aa194a45-lkp@intel.com>
Date: Mon, 14 Oct 2024 13:26:27 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Pierre Gondois <pierre.gondois@....com>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
<aubrey.li@...ux.intel.com>, <yu.c.chen@...el.com>, Hongyan Xia
<hongyan.xia2@....com>, Chritian Loehle <christian.loehle@....com>, "Pierre
Gondois" <pierre.gondois@....com>, Ingo Molnar <mingo@...hat.com>, "Peter
Zijlstra" <peterz@...radead.org>, Juri Lelli <juri.lelli@...hat.com>,
"Vincent Guittot" <vincent.guittot@...aro.org>, Dietmar Eggemann
<dietmar.eggemann@....com>, Steven Rostedt <rostedt@...dmis.org>, Ben Segall
<bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>, Valentin Schneider
<vschneid@...hat.com>, <oliver.sang@...el.com>
Subject: Re: [PATCH 1/1] sched/fair: Update blocked averages on tick
Hello,
kernel test robot noticed "WARNING:at_kernel/sched/sched.h:#update_rq_clock" on:
commit: 8250cf6004de715b0abbbd5bf837d5ac869f1641 ("[PATCH 1/1] sched/fair: Update blocked averages on tick")
url: https://github.com/intel-lab-lkp/linux/commits/Pierre-Gondois/sched-fair-Update-blocked-averages-on-tick/20241011-203402
base: https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git 7266f0a6d3bb73f42ea06656d3cc48c7d0386f71
patch link: https://lore.kernel.org/all/20241011123222.1282936-2-pierre.gondois@arm.com/
patch subject: [PATCH 1/1] sched/fair: Update blocked averages on tick
in testcase: boot
config: x86_64-randconfig-006-20241013
compiler: clang-18
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+-------------------------------------------------------------+------------+------------+
| | 7266f0a6d3 | 8250cf6004 |
+-------------------------------------------------------------+------------+------------+
| boot_successes | 18 | 0 |
| boot_failures | 0 | 21 |
| WARNING:at_kernel/sched/sched.h:#update_rq_clock | 0 | 21 |
| RIP:update_rq_clock | 0 | 21 |
| RIP:default_idle | 0 | 21 |
| WARNING:at_kernel/sched/sched.h:#_update_idle_rq_clock_pelt | 0 | 21 |
| RIP:_update_idle_rq_clock_pelt | 0 | 21 |
| WARNING:at_kernel/sched/sched.h:#update_other_load_avgs | 0 | 21 |
| RIP:update_other_load_avgs | 0 | 21 |
| WARNING:at_kernel/sched/sched.h:#update_blocked_averages | 0 | 21 |
| RIP:update_blocked_averages | 0 | 21 |
+-------------------------------------------------------------+------------+------------+
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202410141238.aa194a45-lkp@intel.com
[ 2.078083][ C1] ------------[ cut here ]------------
[ 2.079049][ C1] WARNING: CPU: 1 PID: 0 at kernel/sched/sched.h:1496 update_rq_clock (kernel/sched/sched.h:1496)
[ 2.080428][ C1] Modules linked in:
[ 2.081070][ C1] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.12.0-rc2-00014-g8250cf6004de #1 dfe5ae60b9ab8d21e49756916bb824f564f72e7b
[ 2.081391][ C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 2.081391][ C1] RIP: 0010:update_rq_clock (kernel/sched/sched.h:1496)
[ 2.081391][ C1] Code: 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 c7 38 41 00 4c 01 3b 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b e9 52 fd ff ff 48 89 df e8 fe 38 01 00 eb e0 48 c7 c1 3c 21
All code
========
0: 00 00 add %al,(%rax)
2: 48 89 d8 mov %rbx,%rax
5: 48 c1 e8 03 shr $0x3,%rax
9: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
e: 74 08 je 0x18
10: 48 89 df mov %rbx,%rdi
13: e8 c7 38 41 00 call 0x4138df
18: 4c 01 3b add %r15,(%rbx)
1b: 48 83 c4 18 add $0x18,%rsp
1f: 5b pop %rbx
20: 41 5c pop %r12
22: 41 5d pop %r13
24: 41 5e pop %r14
26: 41 5f pop %r15
28: 5d pop %rbp
29: c3 ret
2a:* 0f 0b ud2 <-- trapping instruction
2c: e9 52 fd ff ff jmp 0xfffffffffffffd83
31: 48 89 df mov %rbx,%rdi
34: e8 fe 38 01 00 call 0x13937
39: eb e0 jmp 0x1b
3b: 48 rex.W
3c: c7 .byte 0xc7
3d: c1 .byte 0xc1
3e: 3c 21 cmp $0x21,%al
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: e9 52 fd ff ff jmp 0xfffffffffffffd59
7: 48 89 df mov %rbx,%rdi
a: e8 fe 38 01 00 call 0x1390d
f: eb e0 jmp 0xfffffffffffffff1
11: 48 rex.W
12: c7 .byte 0xc7
13: c1 .byte 0xc1
14: 3c 21 cmp $0x21,%al
[ 2.081391][ C1] RSP: 0000:ffffc900001e8df0 EFLAGS: 00010046
[ 2.081391][ C1] RAX: 0000000000000000 RBX: ffff8883aeb396c0 RCX: dffffc0000000000
[ 2.081391][ C1] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff8883aeb396d8
[ 2.081391][ C1] RBP: ffffc900001e8e30 R08: ffffffffb6af076f R09: 1ffffffff6d5e0ed
[ 2.081391][ C1] R10: dffffc0000000000 R11: fffffbfff6d5e0ee R12: dffffc0000000000
[ 2.081391][ C1] R13: dffffc0000000000 R14: ffff8883aeb3a158 R15: ffff8883aeb3a088
[ 2.081391][ C1] FS: 0000000000000000(0000) GS:ffff8883aeb00000(0000) knlGS:0000000000000000
[ 2.081391][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2.081391][ C1] CR2: 0000000000000000 CR3: 0000000182a4c000 CR4: 00000000000406f0
[ 2.081391][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 2.081391][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 2.081391][ C1] Call Trace:
[ 2.081391][ C1] <IRQ>
[ 2.081391][ C1] ? show_regs (arch/x86/kernel/dumpstack.c:479)
[ 2.081391][ C1] ? __warn (kernel/panic.c:748)
[ 2.081391][ C1] ? update_rq_clock (kernel/sched/sched.h:1496)
[ 2.081391][ C1] ? report_bug (lib/bug.c:?)
[ 2.081391][ C1] ? update_rq_clock (kernel/sched/sched.h:1496)
[ 2.081391][ C1] ? handle_bug (arch/x86/kernel/traps.c:285)
[ 2.081391][ C1] ? exc_invalid_op (arch/x86/kernel/traps.c:309)
[ 2.081391][ C1] ? asm_exc_invalid_op (arch/x86/include/asm/idtentry.h:621)
[ 2.081391][ C1] ? update_rq_clock (kernel/sched/sched.h:1496)
[ 2.081391][ C1] update_blocked_averages (kernel/sched/fair.c:9720 kernel/sched/fair.c:9845)
[ 2.081391][ C1] sched_balance_trigger (kernel/sched/fair.c:12887)
[ 2.081391][ C1] sched_tick (kernel/sched/core.c:5617)
[ 2.081391][ C1] update_process_times (kernel/time/timer.c:2526)
[ 2.081391][ C1] tick_periodic (kernel/time/tick-common.c:102)
[ 2.081391][ C1] tick_handle_periodic (kernel/time/tick-common.c:120)
[ 2.081391][ C1] __sysvec_apic_timer_interrupt (arch/x86/include/asm/jump_label.h:27 include/linux/jump_label.h:207 arch/x86/include/asm/trace/irq_vectors.h:41 arch/x86/kernel/apic/apic.c:1044)
[ 2.081391][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1037)
[ 2.081391][ C1] </IRQ>
[ 2.081391][ C1] <TASK>
[ 2.081391][ C1] asm_sysvec_apic_timer_interrupt (arch/x86/include/asm/idtentry.h:702)
[ 2.081391][ C1] RIP: 0010:default_idle (arch/x86/include/asm/irqflags.h:37 arch/x86/include/asm/irqflags.h:92 arch/x86/kernel/process.c:743)
[ 2.081391][ C1] Code: 00 4d 29 c8 4c 01 c7 4c 29 c2 e9 72 ff ff ff cc cc cc cc 90 90 90 b8 0c 67 40 a5 eb 07 0f 00 2d 9f 89 47 00 55 48 89 e5 fb f4 <fa> 5d c3 66 0f 1f 44 00 00 90 90 90 b8 0c 67 40 a5 55 48 89 e5 e8
All code
========
0: 00 4d 29 add %cl,0x29(%rbp)
3: c8 4c 01 c7 enter $0x14c,$0xc7
7: 4c 29 c2 sub %r8,%rdx
a: e9 72 ff ff ff jmp 0xffffffffffffff81
f: cc int3
10: cc int3
11: cc int3
12: cc int3
13: 90 nop
14: 90 nop
15: 90 nop
16: b8 0c 67 40 a5 mov $0xa540670c,%eax
1b: eb 07 jmp 0x24
1d: 0f 00 2d 9f 89 47 00 verw 0x47899f(%rip) # 0x4789c3
24: 55 push %rbp
25: 48 89 e5 mov %rsp,%rbp
28: fb sti
29: f4 hlt
2a:* fa cli <-- trapping instruction
2b: 5d pop %rbp
2c: c3 ret
2d: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
33: 90 nop
34: 90 nop
35: 90 nop
36: b8 0c 67 40 a5 mov $0xa540670c,%eax
3b: 55 push %rbp
3c: 48 89 e5 mov %rsp,%rbp
3f: e8 .byte 0xe8
Code starting with the faulting instruction
===========================================
0: fa cli
1: 5d pop %rbp
2: c3 ret
3: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
9: 90 nop
a: 90 nop
b: 90 nop
c: b8 0c 67 40 a5 mov $0xa540670c,%eax
11: 55 push %rbp
12: 48 89 e5 mov %rsp,%rbp
15: e8 .byte 0xe8
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20241014/202410141238.aa194a45-lkp@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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