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Wed, 15 Oct 2025 06:57:54 +0000 Date: Wed, 15 Oct 2025 14:57:37 +0800 From: kernel test robot To: Tim Chen CC: , , Tim Chen , , , , Peter Zijlstra , Ingo Molnar , K Prateek Nayak , "Gautham R . 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[ 12.551621][ T83] get_cpu_cacheinfo (drivers/base/cacheinfo.c:?) [ 12.551625][ T83] exceed_llc_capacity (include/linux/cacheinfo.h:? kernel/sched/fair.c:1256) [ 12.551632][ T83] task_cache_work.llvm.12119588225164800824 (kernel/sched/fair.c:1527) [ 12.551637][ T83] ? task_work_run (kernel/task_work.c:?) [ 12.551641][ T83] ? _raw_spin_unlock_irq (arch/x86/include/asm/irqflags.h:42 arch/x86/include/asm/irqflags.h:119 include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202) [ 12.551644][ T83] ? __this_cpu_preempt_check (lib/smp_processor_id.c:65) [ 12.551648][ T83] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472) [ 12.551650][ T83] ? _raw_spin_unlock_irq (arch/x86/include/asm/irqflags.h:42 arch/x86/include/asm/irqflags.h:119 include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202) [ 12.551652][ T83] ? task_work_run (kernel/task_work.c:?) [ 12.551655][ T83] ? trace_hardirqs_on (kernel/trace/trace_preemptirq.c:80) [ 12.551662][ T83] task_work_run (kernel/task_work.c:229) [ 12.551668][ T83] resume_user_mode_work (include/linux/resume_user_mode.h:?) [ 12.551673][ T83] irqentry_exit_to_user_mode (kernel/entry/common.c:53 include/linux/irq-entry-common.h:225 kernel/entry/common.c:73) [ 12.551676][ T83] ? sysvec_call_function_single (arch/x86/kernel/apic/apic.c:1050) [ 12.551681][ T83] irqentry_exit (kernel/entry/common.c:210) [ 12.551684][ T83] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050) [ 12.551689][ T83] handle_exception (arch/x86/entry/entry_32.S:1055) [ 12.551691][ T83] EIP: 0x3764e8f0 [ 12.551694][ T83] Code: 00 00 89 c2 eb d2 65 c7 05 28 02 00 00 ff ff ff ff 65 a1 08 00 00 00 f0 83 88 84 00 00 00 10 65 a1 80 00 00 00 e8 f0 02 00 00 <8b> 44 24 04 8b 54 24 08 89 10 8b 54 24 0c 89 50 04 65 8b 15 7c 00 All code ======== 0: 00 00 add %al,(%rax) 2: 89 c2 mov %eax,%edx 4: eb d2 jmp 0xffffffffffffffd8 6: 65 c7 05 28 02 00 00 movl $0xffffffff,%gs:0x228(%rip) # 0x239 d: ff ff ff ff 11: 65 a1 08 00 00 00 f0 movabs %gs:0x848883f000000008,%eax 18: 83 88 84 1b: 00 00 add %al,(%rax) 1d: 00 10 add %dl,(%rax) 1f: 65 a1 80 00 00 00 e8 movabs %gs:0x2f0e800000080,%eax 26: f0 02 00 29:* 00 8b 44 24 04 8b add %cl,-0x74fbdbbc(%rbx) <-- trapping instruction 2f: 54 push %rsp 30: 24 08 and $0x8,%al 32: 89 10 mov %edx,(%rax) 34: 8b 54 24 0c mov 0xc(%rsp),%edx 38: 89 50 04 mov %edx,0x4(%rax) 3b: 65 gs 3c: 8b .byte 0x8b 3d: 15 .byte 0x15 3e: 7c 00 jl 0x40 Code starting with the faulting instruction =========================================== 0: 8b 44 24 04 mov 0x4(%rsp),%eax 4: 8b 54 24 08 mov 0x8(%rsp),%edx 8: 89 10 mov %edx,(%rax) a: 8b 54 24 0c mov 0xc(%rsp),%edx e: 89 50 04 mov %edx,0x4(%rax) 11: 65 gs 12: 8b .byte 0x8b 13: 15 .byte 0x15 14: 7c 00 jl 0x16 [ 12.551696][ T83] EAX: 3fdacc1c EBX: 36a49ba8 ECX: 36a49d64 EDX: 00000001 [ 12.551697][ T83] ESI: 00000000 EDI: 36a49b40 EBP: 00000000 ESP: 3fdacbdc [ 12.551699][ T83] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00200212 [ 12.551708][ T83] ? sysvec_call_function_single (arch/x86/kernel/apic/apic.c:1050) [ 12.551717][ T83] ---[ end trace ]--- The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20251015/202510151429.2c3f3413-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki