Hi, We've had this happen a few times now, pcc_cpufreq is loaded and the machine has a LA of 33 with kworkers consuming *all CPU*
We have had this happen before, looking at it has been pushed to the leaky-stack^tm in my mind and... 32 cores: processor : 31 vendor_id : GenuineIntel cpu family : 6 model : 62 model name : Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz stepping : 4 microcode : 0x42d cpu MHz : 2053.444 cache size : 20480 KB ---- System Information: Manufacturer: HP Product Name: ProLiant SL210t Gen8 --- The only warning I can see, which seems unrelated is: [6928231.623398] WARNING: CPU: 11 PID: 0 at kernel/irq/matrix.c:371 irq_matrix_free+0x35/0xe0 [6928231.623402] Modules linked in: 8021q garp mrp ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype iptable_filter xt_conntrack nf_nat nf_conntrack dm_thin_pool dm_persistent_data dm_bio_prison dm_bufio libcrc32c loop bonding sb_edac x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc aesni_intel crypto_simd cryptd glue_helper intel_cstate intel_rapl_perf iTCO_wdt iTCO_vendor_support joydev input_leds acpi_power_meter pcspkr hpilo sg ipmi_si ipmi_devintf ipmi_msghandler hpwdt ioatdma lpc_ich shpchp pcc_cpufreq mfd_core ip_tables ext4 mbcache jbd2 raid1 sd_mod crc32c_intel serio_raw drm_kms_helper ahci syscopyarea sysfillrect libahci sysimgblt fb_sys_fops ttm libata drm igb [6928231.623490] i2c_algo_bit ixgbe mdio ptp pps_core dca dm_mirror dm_region_hash dm_log dm_mod [6928231.623507] CPU: 11 PID: 0 Comm: swapper/11 Not tainted 4.17.0-1.el7.elrepo.x86_64 #1 [6928231.623509] Hardware name: HP ProLiant SL210t Gen8/, BIOS P83 05/21/2018 [6928231.623514] RIP: 0010:irq_matrix_free+0x35/0xe0 [6928231.623516] RSP: 0018:ffff88203f4c3f58 EFLAGS: 00010002 [6928231.623519] RAX: 0000000000026d00 RBX: ffff880ffaf64340 RCX: 0000000000000000 [6928231.623521] RDX: 000000000000000b RSI: 000000000000000b RDI: ffff880fff038800 [6928231.623523] RBP: ffff88203f4c3f80 R08: 0000000000000101 R09: 0000000000000000 [6928231.623525] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88203f4c0000 [6928231.623527] R13: 0000000000000000 R14: 000000000000000b R15: ffff880fff038800 [6928231.623530] FS: 0000000000000000(0000) GS:ffff88203f4c0000(0000) knlGS:0000000000000000 [6928231.623532] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [6928231.623534] CR2: 00007fc429b73d20 CR3: 000000000220a006 CR4: 00000000001606e0 [6928231.623537] Call Trace: [6928231.623541] <IRQ> [6928231.623554] free_moved_vector+0x58/0x110 [6928231.623563] smp_irq_move_cleanup_interrupt+0xa2/0xc1 [6928231.623572] irq_move_cleanup_interrupt+0xc/0x20 [6928231.623574] </IRQ> [6928231.623582] RIP: 0010:cpuidle_enter_state+0xdd/0x270 [6928231.623583] RSP: 0018:ffffc9000631fe48 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffdf [6928231.623586] RAX: ffff88203f4e2c00 RBX: ffffe8ffff6da700 RCX: 000000000000001f [6928231.623588] RDX: 0000000000000000 RSI: fff0a6fbff885c1c RDI: 0000000000000000 [6928231.623590] RBP: ffffc9000631fe80 R08: 0000000000002036 R09: 00000000000043d0 [6928231.623592] R10: 000000000000133e R11: 0000000000000018 R12: 0000000000000004 [6928231.623594] R13: 000000000000000b R14: ffffffff82364b60 R15: 00189d309ada9b44 [6928231.623599] ? cpuidle_enter_state+0xcc/0x270 [6928231.623603] cpuidle_enter+0x17/0x20 [6928231.623611] call_cpuidle+0x23/0x40 [6928231.623614] do_idle+0x1d2/0x270 [6928231.623619] cpu_startup_entry+0x73/0x80 [6928231.623624] start_secondary+0x1ae/0x200 [6928231.623632] secondary_startup_64+0xa5/0xb0 [6928231.623634] Code: 57 49 89 ff 41 56 41 89 f6 41 55 41 89 d5 89 f2 41 54 4c 8b 24 d5 60 c7 12 82 53 48 8b 47 28 44 39 6f 04 77 06 44 3b 6f 08 72 0d <0f> 0b 5b 41 5c 41 5d 41 5e 41 5f 5d c3 49 01 c4 44 89 e8 f0 49 [6928231.623693] ---[ end trace 6436d0c28a5009d4 ]---
