Tripped this again today w/ 5.4.0-86-generic:


[179417.505068] watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [kworker/2:1:691464]
[179417.505110] Modules linked in: xt_multiport cpuid veth xt_MASQUERADE nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo iptable_nat nf_nat br_netfilter bridge stp llc aufs overlay nls_iso8859_1 dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua edac_mce_amd ftdi_sio eeepc_wmi kvm_amd usbserial asus_wmi sparse_keymap snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio kvm snd_hda_codec_hdmi video snd_hda_intel snd_intel_dspcfg wmi_bmof snd_hda_codec snd_hda_core snd_hwdep snd_pcm k10temp snd_timer snd soundcore ccp mac_hid nf_log_ipv6 ip6t_REJECT nf_reject_ipv6 xt_hl ip6t_rt nf_log_ipv4 nf_log_common ipt_REJECT nf_reject_ipv4 xt_LOG xt_limit xt_addrtype sch_fq_codel xt_tcpudp xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip6table_filter ip6_tables iptable_filter bpfilter msr ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear hid_generic uas usbhid hid
[179417.505142]  usb_storage amdgpu crct10dif_pclmul crc32_pclmul ghash_clmulni_intel amd_iommu_v2 gpu_sched aesni_intel ttm crypto_simd drm_kms_helper cryptd syscopyarea glue_helper sysfillrect sysimgblt fb_sys_fops igb mxm_wmi drm dca i2c_algo_bit ahci libahci i2c_piix4 wmi gpio_amdpt gpio_generic
[179417.505153] CPU: 2 PID: 691464 Comm: kworker/2:1 Not tainted 5.4.0-86-generic #97-Ubuntu
[179417.505154] Hardware name: System manufacturer System Product Name/ROG STRIX X399-E GAMING, BIOS 1203 10/09/2019
[179417.505160] Workqueue: events free_work
[179417.505164] RIP: 0010:smp_call_function_many+0x208/0x270
[179417.505166] Code: 92 00 3b 05 8e c9 70 01 89 c7 0f 83 9b fe ff ff 48 63 c7 48 8b 0b 48 03 0c c5 80 99 84 af 8b 41 18 a8 01 74 0a f3 90 8b 51 18 <83> e2 01 75 f6 eb c8 89 cf 48 c7 c2 e0 b8 c4 af 4c 89 fe e8 00 1d
[179417.505166] RSP: 0018:ffffa88c84877d00 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13
[179417.505167] RAX: 0000000000000003 RBX: ffff97e83d0abd40 RCX: ffff97e83d072080
[179417.505168] RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000001
[179417.505168] RBP: ffffa88c84877d40 R08: ffff97e836da7c40 R09: 0000000000000003
[179417.505169] R10: ffff97e836da7c40 R11: 0000000000000002 R12: ffffffffae481930
[179417.505169] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000080
[179417.505170] FS:  0000000000000000(0000) GS:ffff97e83d080000(0000) knlGS:0000000000000000
[179417.505170] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[179417.505171] CR2: 00007fde360abfb0 CR3: 00000003f880a000 CR4: 00000000003406e0
[179417.505171] Call Trace:
[179417.505176]  ? load_new_mm_cr3+0xf0/0xf0
[179417.505177]  on_each_cpu+0x2d/0x60
[179417.505178]  flush_tlb_kernel_range+0x38/0x90
[179417.505179]  __purge_vmap_area_lazy+0x70/0x6d0
[179417.505180]  free_vmap_area_noflush+0xe1/0xf0
[179417.505180]  remove_vm_area+0x9a/0xb0
[179417.505181]  __vunmap+0x5f/0x210
[179417.505182]  free_work+0x25/0x30
[179417.505184]  process_one_work+0x1eb/0x3b0
[179417.505185]  worker_thread+0x4d/0x400
[179417.505186]  kthread+0x104/0x140
[179417.505187]  ? process_one_work+0x3b0/0x3b0
[179417.505188]  ? kthread_park+0x90/0x90
[179417.505190]  ret_from_fork+0x22/0x40
[179426.629482] Sending NMI from CPU 11 to CPUs 17:
[179445.505306] watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [kworker/2:1:691464]