Backtrace

WARNING: CPU: 0 PID: 28 at mm/mmu_notifier.c:502 __mmu_notifier_invalidate_range_start.cold+0x4a/0x56
Modules linked in: uinput snd_seq_dummy snd_hrtimer xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_nat_tftp nf_conntrack_tftp bridge stp llc nft_objref nf_conntrack_netbios_ns nf_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_raw iptable_security ip_set nf_tables nfnetlink rfkill ip6table_filter ip6_tables iptable_filter intel_rapl_msr sunrpc intel_rapl_common x86_pkg_temp_thermal mei_hdcp intel_powerclamp at24 coretemp kvm_intel iTCO_wdt intel_pmc_bxt iTCO_vendor_support kvm vfat fat irqbypass rapl intel_cstate intel_uncore snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi pcspkr joydev snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec snd_hda_core snd_hwdep snd_seq snd_seq_device snd_pcm
 mei_me snd_timer mei snd i2c_i801 lpc_ich i2c_smbus soundcore zram ip_tables i915 i2c_algo_bit drm_kms_helper crct10dif_pclmul crc32_pclmul crc32c_intel cec drm ghash_clmulni_intel r8169 video fuse
CPU: 0 PID: 28 Comm: kcompactd0 Not tainted 5.12.7-300.fc34.x86_64 #1
Hardware name: Gigabyte Technology Co., Ltd. H81M-H/H81M-H, BIOS F7 05/08/2014
RIP: 0010:__mmu_notifier_invalidate_range_start.cold+0x4a/0x56
Code: 88 89 54 24 04 e8 cd 80 ff ff f6 45 20 01 8b 54 24 04 75 16 83 fa f5 75 11 49 83 7f 30 00 74 0e 0f 0b 41 89 d5 e9 f1 7d 75 ff <0f> 0b eb eb 41 89 d5 e9 e5 7d 75 ff 49 39 de 74 4b 48 c7 c7 18 19
RSP: 0000:ffffbedbc0113ab8 EFLAGS: 00010202
RAX: 0000000000000061 RBX: ffff9936854bba98 RCX: 0000000000000000
RDX: 00000000fffffff0 RSI: ffff99371ba185c0 RDI: ffff99371ba185c0
RBP: ffffbedbc0113b30 R08: 0000000000000000 R09: ffffbedbc01138f0
R10: ffffbedbc01138e8 R11: ffffffff88b45f28 R12: ffff993659c58cc0
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffffc056a6a0
FS:  0000000000000000(0000) GS:ffff99371ba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000d2ae0809000 CR3: 0000000044a10004 CR4: 00000000000706f0
Call Trace:
 try_to_unmap_one+0x9bc/0xc60
 ? migrate_page_move_mapping+0x1c1/0x740
 ? migrate_page_move_mapping+0xec/0x740
 rmap_walk_file+0x13f/0x2b0
 try_to_unmap+0xa6/0xe0
 ? page_remove_rmap+0x330/0x330
 ? anon_vma_ctor+0x40/0x40
 ? page_get_anon_vma+0x80/0x80
 migrate_pages+0x4eb/0xf30
 ? isolate_freepages_block+0x3c0/0x3c0
 ? split_map_pages+0x160/0x160
 ? migrate_page_states+0x290/0x290
 compact_zone+0x5f8/0xd10
 ? dequeue_entity+0xc9/0x460
 ? __switch_to_asm+0x42/0x70
 proactive_compact_node+0x7b/0xb0
 kcompactd+0x2cf/0x350
 ? finish_wait+0x80/0x80
 ? kcompactd_do_work+0x250/0x250
 kthread+0x11b/0x140
 ? kthread_associate_blkcg+0xa0/0xa0
 ret_from_fork+0x22/0x30