Here, I think this is it. The problem is happening right now, and again, I
had left it for about an half an hour. When I got back the CPU was at 100%
and after I entered my password again (to unlock the OS) and ran the commands
you posted, here is the output:
[ 6929.704528] NMI backtrace for cpu 0
[ 6929.704533] CPU 0
[ 6929.704536] Modules linked in: bnep rfcomm bluetooth binfmt_misc xfs
ip6t_REJECT xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT xt_LOG
xt_limit xt_tcpudp xt_addrtype xt_conntrack acer_wmi sparse_keymap
ip6table_filter ip6_tables snd_hda_codec_hdmi nf_conntrack_netbios_ns
nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ipv4 nf_defrag_ipv4
snd_hda_codec_realtek nf_conntrack_ftp nf_conntrack iptable_filter
snd_hda_intel snd_hda_codec snd_hwdep ip_tables x_tables snd_pcm uvcvideo
videobuf2_vmalloc videobuf2_memops dm_multipath microcode snd_page_alloc
videobuf2_core videodev snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq
arc4 k10temp joydev scsi_dh edac_core serio_raw edac_mce_amd snd_seq_device
snd_timer snd ath9k soundcore ath9k_common ath9k_hw ath mac80211 cfg80211
sp5100_tco i2c_piix4 shpchp mac_hid parport_pc ppdev lp parport btrfs
libcrc32c zlib_deflate xts gf128mul dm_crypt raid10 raid456 async_memcpy
async_raid6_recov async_pq async_xor xor async_tx raid6_pq raid1 raid0
multipath linear dm_mirror dm_region_hash dm_log ums_realtek usb_storage
radeon psmouse tg3 i2c_algo_bit ttm drm_kms_helper drm video wmi
[ 6929.704705]
[ 6929.704711] Pid: 3062, comm: bash Not tainted 3.4.112-gnu1 #1
[ 6929.704723] RIP: 0010:[] [] __bitmap_empty+0x4/0x90
[ 6929.704742] RSP: 0018:ffff88007c623e10 EFLAGS: 00000096
[ 6929.704747] RAX: 0000000000000000 RBX: 0000000000000000 RCX:
000000000003ffff
[ 6929.704753] RDX: 0000000000000000 RSI: 0000000000000100 RDI:
ffffffff81cd3660
[ 6929.704759] RBP: ffff88007c623e28 R08: 000000000000013f R09:
000000000000000a
[ 6929.704765] R10: 0000000000000000 R11: 0000000000000000 R12:
ffffffff81c79fa0
[ 6929.704770] R13: 0000000000000286 R14: 0000000000000004 R15:
0000000000000000
[ 6929.704777] FS: 00007f5c6315e740(0000) GS:ffff88010fc00000(0000)
knlGS:00000000f7409700
[ 6929.704784] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 6929.704789] CR2: 00007f5c627dc000 CR3: 00000000325ca000 CR4:
00000000000007f0
[ 6929.704795] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 6929.704801] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[ 6929.704807] Process bash (pid: 3062, threadinfo ffff88007c622000, task
ffff8800b2ce8000)
[ 6929.704812] Stack:
[ 6929.704816] ffffffff81034d26 0000000000000000 000000000000006c
ffff88007c623e38
[ 6929.704825] ffffffff813e110e ffff88007c623e78 ffffffff813e14f9
0000000d718c45e3
[ 6929.704833] 0000000000000002 fffffffffffffffb ffff8800cf2d7d00
ffffffff813e1560
[ 6929.704842] Call Trace:
[ 6929.704854] [] ? arch_trigger_all_cpu_backtrace+0x86/0xa0
[ 6929.704866] [] sysrq_handle_showallcpus+0xe/0x10
[ 6929.704875] [] __handle_sysrq+0x129/0x190
[ 6929.704884] [] ? __handle_sysrq+0x190/0x190
[ 6929.704893] [] write_sysrq_trigger+0x4a/0x50
[ 6929.704902] [] proc_reg_write+0x84/0xc0
[ 6929.704911] [] vfs_write+0xc8/0x190
[ 6929.704918] [] sys_write+0x51/0x90
[ 6929.704928] [] system_call_fastpath+0x16/0x1b
[ 6929.704932] Code: 89 45 f0 48 89 45 b8 48 8d 45 d0 4c 89 4d f8 c7 45 b0 10
00 00 00 48 89 45 c0 e8 38 ff ff ff c9 c3 90 90 90 90 90 90 44 8d 46 3f f6
55 44 0f 49 c6 31 d2 48 89 e5 41 c1 f8 06 45 85 c0 7e 24
[ 6929.704998] Call Trace:
[ 6929.705005] [] ? arch_trigger_all_cpu_backtrace+0x86/0xa0
[ 6929.705015] [] sysrq_handle_showallcpus+0xe/0x10
[ 6929.705023] [] __handle_sysrq+0x129/0x190
[ 6929.705032] [] ? __handle_sysrq+0x190/0x190
[ 6929.705040] [] write_sysrq_trigger+0x4a/0x50
[ 6929.705048] [] proc_reg_write+0x84/0xc0
[ 6929.705055] [] vfs_write+0xc8/0x190
[ 6929.705062] [] sys_write+0x51/0x90
[ 6929.705070] [] system_call_fastpath+0x16/0x1b
I don't see why this is happening, since there is nothing appearing
"repeated".
