Messages in this thread | | | Subject | "Force HWP min perf before offline" triggers unchecked MSR access errors | From | Qian Cai <> | Date | Tue, 29 Oct 2019 16:55:05 -0400 |
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The commit af3b7379e2d7 ("cpufreq: intel_pstate: Force HWP min perf before offline") triggers an error below while doing CPU hotplug. Reverted it (on the top of the linux-next) fixed it.
https://raw.githubusercontent.com/cailca/linux-mm/master/x86.config
# lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 144 On-line CPU(s) list: 0-143 Thread(s) per core: 2 Core(s) per socket: 18 Socket(s): 4 NUMA node(s): 4 Vendor ID: GenuineIntel CPU family: 6 Model: 85 Model name: Intel(R) Xeon(R) Gold 6154 CPU @ 3.00GHz Stepping: 4 CPU MHz: 1200.001 CPU max MHz: 3700.0000 CPU min MHz: 1200.0000 BogoMIPS: 6000.00 Virtualization: VT-x L1d cache: 32K L1i cache: 32K L2 cache: 1024K L3 cache: 25344K NUMA node0 CPU(s): 0-17,72-89 NUMA node1 CPU(s): 18-35,90-107 NUMA node2 CPU(s): 36-53,108-125 NUMA node3 CPU(s): 54-71,126-143 Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 cdp_l3 invpcid_single pti intel_ppin ssbd mba ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm mpx rdt_a avx512f avx512dq rdseed adx smap clflushopt clwb intel_pt avx512cd avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm ida arat pln pts hwp hwp_act_window hwp_pkg_req pku ospke md_clear flush_l1d
[17670.190223][T69701] LTP: starting cpuhotplug02 (cpuhotplug02.sh -c 1 -l 1) [17676.195430][ T15] unchecked MSR access error: WRMSR to 0x1b0 (tried to write 0x00000000000000c0) at rIP: 0xffffffff82b0a97c (__wrmsr_on_cpu+0xbc/0x130) [17676.209251][ T15] Call Trace: [17676.212410][ T15] ? rdmsrl_on_cpu+0xf0/0xf0 [17676.216882][ T15] generic_exec_single+0x13e/0x1d0 [17676.221876][ T15] ? rdmsrl_on_cpu+0xf0/0xf0 [17676.226344][ T15] smp_call_function_single+0x1aa/0x200 [17676.231774][ T15] ? generic_exec_single+0x1d0/0x1d0 [17676.236942][ T15] ? rdmsrl_on_cpu+0xb1/0xf0 [17676.241410][ T15] wrmsrl_on_cpu+0xa6/0xe0 [17676.245705][ T15] ? wrmsr_on_cpu+0xf0/0xf0 [17676.250091][ T15] ? kasan_slab_free+0xe/0x10 [17676.254650][ T15] ? intel_pstate_get_epp+0x168/0x190 [17676.259905][ T15] ? store_energy_performance_preference+0x370/0x370 [17676.266469][ T15] intel_pstate_set_epb+0xc8/0x110 [17676.271463][ T15] ? show_status+0x80/0x80 [17676.275760][ T15] ? down_write_killable+0x160/0x160 [17676.280927][ T15] intel_pstate_stop_cpu+0x126/0x150 [17676.286094][ T15] cpufreq_offline+0x17c/0x3a0 [17676.290737][ T15] ? cpufreq_offline+0x3a0/0x3a0 [17676.295556][ T15] cpuhp_cpufreq_offline+0xe/0x20 [17676.300464][ T15] cpuhp_invoke_callback+0x197/0x1120 [17676.305724][ T15] ? lock_acquire+0x126/0x280 [17676.310280][ T15] ? cpuhp_thread_fun+0x69/0x2f0 [17676.315098][ T15] cpuhp_thread_fun+0x252/0x2f0 [17676.319830][ T15] ? __cpuhp_state_remove_instance+0x350/0x350 [17676.325876][ T15] smpboot_thread_fn+0x255/0x440 [17676.330695][ T15] ? smpboot_register_percpu_thread+0x110/0x110 [17676.336824][ T15] ? __kasan_check_read+0x11/0x20 [17676.341731][ T15] ? __kthread_parkme+0xc6/0xe0 [17676.346463][ T15] ? smpboot_register_percpu_thread+0x110/0x110 [17676.352590][ T15] kthread+0x1e6/0x210 [17676.356534][ T15] ? kthread_create_worker_on_cpu+0xc0/0xc0 [17676.362314][ T15] ret_from_fork+0x3a/0x50 [17676.895221][ T16] IRQ 273: no longer affine to CPU1 [17676.901373][ T16] process 69725 (cpuhotplug_do_s) no longer affine to cpu1
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