Hi, Note: I am not sure I have the correct e-mail list for this. As of kernel 4.11-rc1 I have a very infrequent issue (only four times so far, once with -rc1 and three times with -rc2 (I never used -rc3, and am now running -rc4)) where ksmd becomes stuck, the load average goes way up and one CPU keeps hitting the NMI watchdog. I have not been able to figure out a way to recover and end up hitting the reset button on the computer. I am running 2 VM guests on this host server at the time. Note: these events have always been preceded by some other event, and so something else might be the root issue here. However, the preceding event also seems to be ksm related, not sure. Since the issue is so infrequent, and the event requires a hard reset, it would be almost impossible to bi-sect the kernel to isolate it. I am willing to do the work to isolate the issue, I just don't know what to do. While I never had this issue before kernel 4.11-rc1, I also do not run VM guests on this test computer all the time. Doug Smythies Log segment for one occurrence: Mar 27 15:17:07 s15 kernel: [92420.587173] BUG: unable to handle kernel paging request at ffff88e680000000 Mar 27 15:17:07 s15 kernel: [92420.587203] IP: page_vma_mapped_walk+0xe6/0x5b0 Mar 27 15:17:07 s15 kernel: [92420.587217] PGD ac80a067 Mar 27 15:17:07 s15 kernel: [92420.587217] PUD 41f5ff067 Mar 27 15:17:07 s15 kernel: [92420.587226] PMD 0 Mar 27 15:17:07 s15 kernel: [92420.587235] Mar 27 15:17:07 s15 kernel: [92420.587248] Oops: 0000 [#1] SMP Mar 27 15:17:07 s15 kernel: [92420.587259] Modules linked in: ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs cpuid vhost_net vhost tap xt_conntrack ipt_REJECT nf_reject_ipv4 ebtable_filter ebtables ip6_tables xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp iptable_filter ip_tables x_tables snd_hda_codec_hdmi snd_hda_codec_realtek intel_rapl eeepc_wmi asus_wmi sparse_keymap snd_hda_codec_generic x86_pkg_temp_thermal snd_hda_intel snd_hda_codec intel_powerclamp bridge stp llc coretemp snd_hda_core snd_hwdep snd_pcm snd_timer snd soundcore intel_cstate ppdev mei_me mei shpchp input_leds intel_rapl_perf kvm_intel kvm irqbypass serio_raw parport_pc lpc_ich parport mac_hid tpm_infineon ib_iser rdma_cm iw_cm ib_cm ib_core configfs iscsi_tcp Mar 27 15:17:07 s15 kernel: [92420.587467] libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear i915 crct10dif_pclmul crc32_pclmul ghash_clmulni_intel i2c_algo_bit pcbc drm_kms_helper aesni_intel e1000e syscopyarea aes_x86_64 sysfillrect sysimgblt crypto_simd fb_sys_fops ahci glue_helper ptp r8169 cryptd libahci mii pps_core pata_acpi drm wmi fjes video Mar 27 15:17:07 s15 kernel: [92420.587587] CPU: 1 PID: 81 Comm: kswapd0 Not tainted 4.11.0-rc2-stock #218 Mar 27 15:17:07 s15 kernel: [92420.587607] Hardware name: System manufacturer System Product Name/P8Z68-M PRO, BIOS 4003 05/09/2013 Mar 27 15:17:07 s15 kernel: [92420.587632] task: ffff88ea4cab9680 task.stack: ffffb10c01e10000 Mar 27 15:17:07 s15 kernel: [92420.587650] RIP: 0010:page_vma_mapped_walk+0xe6/0x5b0 Mar 27 15:17:07 s15 kernel: [92420.587665] RSP: 0018:ffffb10c01e13a48 EFLAGS: 00010206 Mar 27 15:17:07 s15 kernel: [92420.587681] RAX: ffff88e67ffffff8 RBX: ffffb10c01e13a98 RCX: ffff88e680000000 Mar 27 15:17:07 s15 kernel: [92420.587701] RDX: 0017ffffc004005d RSI: 00003ffffffff000 RDI: ffffe4f74fc00080 Mar 27 15:17:07 s15 kernel: [92420.587721] RBP: ffffb10c01e13a78 R08: 0000000000000000 R09: 0000000000000000 Mar 27 15:17:07 s15 kernel: [92420.587749] R10: 0000000000000000 R11: 0000000000000289 R12: ffffe4f74fc00080 Mar 27 15:17:07 s15 kernel: [92420.587770] R13: ffffe4f74fc00080 R14: 00007f2e32400200 R15: ffff88e91e77c840 Mar 27 15:17:07 s15 kernel: [92420.587806] FS: 0000000000000000(0000) GS:ffff88ea5f240000(0000) knlGS:0000000000000000 Mar 27 15:17:07 s15 kernel: [92420.587829] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Mar 27 15:17:07 s15 kernel: [92420.587845] CR2: ffff88e680000000 CR3: 00000000ac209000 CR4: 00000000000426e0 Mar 27 15:17:07 s15 kernel: [92420.587865] Call Trace: Mar 27 15:17:07 s15 kernel: [92420.587876] page_referenced_one+0x91/0x1a0 Mar 27 15:17:07 s15 kernel: [92420.587890] rmap_walk_ksm+0x100/0x190 Mar 27 15:17:07 s15 kernel: [92420.587902] rmap_walk+0x4f/0x60 Mar 27 15:17:07 s15 kernel: [92420.587913] page_referenced+0x149/0x170 Mar 27 15:17:07 s15 kernel: [92420.587926] ? invalid_page_referenced_vma+0x80/0x80 Mar 27 15:17:07 s15 kernel: [92420.587941] ? page_get_anon_vma+0x90/0x90 Mar 27 15:17:07 s15 kernel: [92420.587955] shrink_active_list+0x1c2/0x430 Mar 27 15:17:07 s15 kernel: [92420.587969] shrink_node_memcg+0x67a/0x7a0 Mar 27 15:17:07 s15 kernel: [92420.587983] shrink_node+0xe1/0x320 Mar 27 15:17:07 s15 kernel: [92420.587995] kswapd+0x34b/0x720 Mar 27 15:17:07 s15 kernel: [92420.588007] kthread+0x101/0x140 Mar 27 15:17:07 s15 kernel: [92420.588018] ? mem_cgroup_shrink_node+0x180/0x180 Mar 27 15:17:07 s15 kernel: [92420.588032] ? kthread_create_on_node+0x60/0x60 Mar 27 15:17:07 s15 kernel: [92420.588048] ret_from_fork+0x2c/0x40 Mar 27 15:17:07 s15 kernel: [92420.588059] Code: 08 00 00 20 00 49 39 c6 0f 83 7a ff ff ff 4c 8b 73 10 41 f7 c6 ff ff 1f 00 0f 84 87 02 00 00 48 8b 43 20 48 8d 48 08 48 89 4b 20 <48> f7 40 08 9f ff ff ff 0f 85 92 02 00 00 49 81 c6 00 10 00 00 Mar 27 15:17:07 s15 kernel: [92420.588125] RIP: page_vma_mapped_walk+0xe6/0x5b0 RSP: ffffb10c01e13a48 Mar 27 15:17:07 s15 kernel: [92420.588144] CR2: ffff88e680000000 Mar 27 15:17:07 s15 kernel: [92420.595225] ---[ end trace 6e15d07cde4cc6de ]--- Mar 27 15:17:35 s15 kernel: [92448.572972] NMI watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [ksmd:64] Mar 27 15:17:35 s15 kernel: [92448.574115] Modules linked in: ... deleted... see above Mar 27 15:17:35 s15 kernel: [92448.583245] CPU: 2 PID: 64 Comm: ksmd Tainted: G D 4.11.0-rc2-stock #218 Mar 27 15:17:35 s15 kernel: [92448.584616] Hardware name: System manufacturer System Product Name/P8Z68-M PRO, BIOS 4003 05/09/2013 Mar 27 15:17:35 s15 kernel: [92448.586014] task: ffff88ea4c822d00 task.stack: ffffb10c01af8000 Mar 27 15:17:35 s15 kernel: [92448.587452] RIP: 0010:native_queued_spin_lock_slowpath+0x17c/0x1a0 Mar 27 15:17:35 s15 kernel: [92448.588853] RSP: 0018:ffffb10c01afbd70 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10 Mar 27 15:17:35 s15 kernel: [92448.590300] RAX: 0000000000000101 RBX: ffff88e6757d7e10 RCX: 0000000000000001 Mar 27 15:17:35 s15 kernel: [92448.591766] RDX: 0000000000000101 RSI: 0000000000000001 RDI: ffffe4f740d5f5f0 Mar 27 15:17:35 s15 kernel: [92448.593215] RBP: ffffb10c01afbd70 R08: 0000000000000101 R09: ffff88e91e5c7b48 Mar 27 15:17:35 s15 kernel: [92448.594687] R10: 0000000000000000 R11: 00000000000003bd R12: ffffe4f740d5f5f0 Mar 27 15:17:35 s15 kernel: [92448.596111] R13: 0000000000000004 R14: ffff88e91e5c7b48 R15: ffffc00000000fff Mar 27 15:17:35 s15 kernel: [92448.597571] FS: 0000000000000000(0000) GS:ffff88ea5f280000(0000) knlGS:0000000000000000 Mar 27 15:17:35 s15 kernel: [92448.599026] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Mar 27 15:17:35 s15 kernel: [92448.600449] CR2: 00007fb04f4a51e4 CR3: 00000000ac209000 CR4: 00000000000426e0 Mar 27 15:17:35 s15 kernel: [92448.601893] Call Trace: Mar 27 15:17:35 s15 kernel: [92448.603395] _raw_spin_lock+0x20/0x30 Mar 27 15:17:35 s15 kernel: [92448.604819] follow_page_pte+0x10c/0x650 Mar 27 15:17:35 s15 kernel: [92448.606300] follow_page_mask+0x1ee/0x5b0 Mar 27 15:17:35 s15 kernel: [92448.607693] ? find_vma+0x68/0x70 Mar 27 15:17:35 s15 kernel: [92448.609078] ksm_scan_thread+0xc08/0x12a0 Mar 27 15:17:35 s15 kernel: [92448.610476] ? wake_atomic_t_function+0x60/0x60 Mar 27 15:17:35 s15 kernel: [92448.611789] kthread+0x101/0x140 Mar 27 15:17:35 s15 kernel: [92448.613086] ? try_to_merge_with_ksm_page+0xa0/0xa0 Mar 27 15:17:35 s15 kernel: [92448.614337] ? kthread_create_on_node+0x60/0x60 Mar 27 15:17:35 s15 kernel: [92448.615535] ret_from_fork+0x2c/0x40 Mar 27 15:17:35 s15 kernel: [92448.616707] Code: c0 74 e6 4d 85 c9 c6 07 01 74 30 41 c7 41 08 01 00 00 00 e9 51 ff ff ff 83 fa 01 0f 84 af fe ff ff 8b 07 84 c0 74 08 f3 90 8b 07 <84> c0 75 f8 b8 01 00 00 00 66 89 07 5d c3 f3 90 4c 8b 09 4d 85 Mar 27 15:18:03 s15 kernel: [92476.574198] NMI watchdog: BUG: soft lockup - CPU#2 stuck for 22s! [ksmd:64] Mar 27 15:18:03 s15 kernel: [92476.575563] Modules linked in: ... deleted ... see above Mar 27 15:18:03 s15 kernel: [92476.585693] CPU: 2 PID: 64 Comm: ksmd Tainted: G D L 4.11.0-rc2-stock #218 Mar 27 15:18:03 s15 kernel: [92476.587255] Hardware name: System manufacturer System Product Name/P8Z68-M PRO, BIOS 4003 05/09/2013 Mar 27 15:18:03 s15 kernel: [92476.588763] task: ffff88ea4c822d00 task.stack: ffffb10c01af8000 Mar 27 15:18:03 s15 kernel: [92476.590350] RIP: 0010:native_queued_spin_lock_slowpath+0x17c/0x1a0 Mar 27 15:18:03 s15 kernel: [92476.591862] RSP: 0018:ffffb10c01afbd70 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10 Mar 27 15:18:03 s15 kernel: [92476.593367] RAX: 0000000000000101 RBX: ffff88e6757d7e10 RCX: 0000000000000001 Mar 27 15:18:03 s15 kernel: [92476.594974] RDX: 0000000000000101 RSI: 0000000000000001 RDI: ffffe4f740d5f5f0 Mar 27 15:18:03 s15 kernel: [92476.596494] RBP: ffffb10c01afbd70 R08: 0000000000000101 R09: ffff88e91e5c7b48 Mar 27 15:18:03 s15 kernel: [92476.598088] R10: 0000000000000000 R11: 00000000000003bd R12: ffffe4f740d5f5f0 Mar 27 15:18:03 s15 kernel: [92476.599686] R13: 0000000000000004 R14: ffff88e91e5c7b48 R15: ffffc00000000fff Mar 27 15:18:03 s15 kernel: [92476.601246] FS: 0000000000000000(0000) GS:ffff88ea5f280000(0000) knlGS:0000000000000000 Mar 27 15:18:03 s15 kernel: [92476.602880] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Mar 27 15:18:03 s15 kernel: [92476.604438] CR2: 00007fb04f4a51e4 CR3: 00000000ac209000 CR4: 00000000000426e0 Mar 27 15:18:03 s15 kernel: [92476.606060] Call Trace: Mar 27 15:18:03 s15 kernel: [92476.607677] _raw_spin_lock+0x20/0x30 Mar 27 15:18:03 s15 kernel: [92476.609306] follow_page_pte+0x10c/0x650 Mar 27 15:18:03 s15 kernel: [92476.610918] follow_page_mask+0x1ee/0x5b0 Mar 27 15:18:03 s15 kernel: [92476.612464] ? find_vma+0x68/0x70 Mar 27 15:18:03 s15 kernel: [92476.614038] ksm_scan_thread+0xc08/0x12a0 Mar 27 15:18:03 s15 kernel: [92476.615522] ? wake_atomic_t_function+0x60/0x60 Mar 27 15:18:03 s15 kernel: [92476.617007] kthread+0x101/0x140 Mar 27 15:18:03 s15 kernel: [92476.618473] ? try_to_merge_with_ksm_page+0xa0/0xa0 Mar 27 15:18:03 s15 kernel: [92476.619923] ? kthread_create_on_node+0x60/0x60 Mar 27 15:18:03 s15 kernel: [92476.621415] ret_from_fork+0x2c/0x40 Mar 27 15:18:03 s15 kernel: [92476.622838] Code: c0 74 e6 4d 85 c9 c6 07 01 74 30 41 c7 41 08 01 00 00 00 e9 51 ff ff ff 83 fa 01 0f 84 af fe ff ff 8b 07 84 c0 74 08 f3 90 8b 07 <84> c0 75 f8 b8 01 00 00 00 66 89 07 5d c3 f3 90 4c 8b 09 4d 85 Mar 27 15:18:07 s15 kernel: [92480.606373] INFO: rcu_sched self-detected stall on CPU Mar 27 15:18:07 s15 kernel: [92480.607801] 2-...: (14977 ticks this GP) idle=851/140000000000001/0 softirq=1548471/1548471 fqs=7220 Mar 27 15:18:07 s15 kernel: [92480.609207] (t=15001 jiffies g=271179 c=271178 q=2337) Mar 27 15:18:07 s15 kernel: [92480.610374] INFO: rcu_sched detected stalls on CPUs/tasks: Mar 27 15:18:07 s15 kernel: [92480.610377] 2-...: (14977 ticks this GP) idle=851/140000000000001/0 softirq=1548471/1548471 fqs=7220 Mar 27 15:18:07 s15 kernel: [92480.610378] (detected by 0, t=15002 jiffies, g=271179, c=271178, q=2337) Mar 27 15:18:07 s15 kernel: [92480.610381] Sending NMI from CPU 0 to CPUs 2: Mar 27 15:18:07 s15 kernel: [92480.611374] NMI backtrace for cpu 2 Mar 27 15:18:07 s15 kernel: [92480.611375] CPU: 2 PID: 64 Comm: ksmd Tainted: G D L 4.11.0-rc2-stock #218 Mar 27 15:18:07 s15 kernel: [92480.611375] Hardware name: System manufacturer System Product Name/P8Z68-M PRO, BIOS 4003 05/09/2013 Mar 27 15:18:07 s15 kernel: [92480.611376] task: ffff88ea4c822d00 task.stack: ffffb10c01af8000 Mar 27 15:18:07 s15 kernel: [92480.611376] RIP: 0010:cfb_imageblit+0x4aa/0x4e0 Mar 27 15:18:07 s15 kernel: [92480.611376] RSP: 0018:ffff88ea5f283960 EFLAGS: 00000002 Mar 27 15:18:07 s15 kernel: [92480.611376] RAX: 0000000000010101 RBX: 0000000000000000 RCX: 0000000000000002 Mar 27 15:18:07 s15 kernel: [92480.611377] RDX: ffffb10c10584cb4 RSI: 0000000000010101 RDI: 0000000000000001 Mar 27 15:18:07 s15 kernel: [92480.611377] RBP: ffff88ea5f2839d8 R08: ffff88ea4485b15b R09: 0000000000cdcdcd Mar 27 15:18:07 s15 kernel: [92480.611377] R10: ffffffff83a84580 R11: 0000000000000001 R12: ffffb10c10584cb8 Mar 27 15:18:07 s15 kernel: [92480.611377] R13: ffffb10c10584d40 R14: ffff88ea4485b150 R15: ffffb10c10584b40 Mar 27 15:18:07 s15 kernel: [92480.611378] FS: 0000000000000000(0000) GS:ffff88ea5f280000(0000) knlGS:0000000000000000 Mar 27 15:18:07 s15 kernel: [92480.611378] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Mar 27 15:18:07 s15 kernel: [92480.611378] CR2: 00007fb04f4a51e4 CR3: 00000000ac209000 CR4: 00000000000426e0 Mar 27 15:18:07 s15 kernel: [92480.611378] Call Trace: Mar 27 15:18:07 s15 kernel: [92480.611378] <IRQ> Mar 27 15:18:07 s15 kernel: [92480.611379] drm_fb_helper_cfb_imageblit+0x17/0x40 [drm_kms_helper] Mar 27 15:18:07 s15 kernel: [92480.611379] bit_putcs+0x2f2/0x560 Mar 27 15:18:07 s15 kernel: [92480.611379] ? soft_cursor+0x1ad/0x230 Mar 27 15:18:07 s15 kernel: [92480.611379] ? bit_cursor+0x646/0x680 Mar 27 15:18:07 s15 kernel: [92480.611379] ? bit_clear+0x110/0x110 Mar 27 15:18:07 s15 kernel: [92480.611380] fbcon_putcs+0xfd/0x130 Mar 27 15:18:07 s15 kernel: [92480.611380] fbcon_redraw.isra.23+0xe2/0x1d0 Mar 27 15:18:07 s15 kernel: [92480.611380] fbcon_scroll+0x10f/0xd60 Mar 27 15:18:07 s15 kernel: [92480.611380] con_scroll+0x16a/0x180 Mar 27 15:18:07 s15 kernel: [92480.611380] lf+0xa1/0xb0 Mar 27 15:18:07 s15 kernel: [92480.611381] vt_console_print+0x2b9/0x3e0 Mar 27 15:18:07 s15 kernel: [92480.611381] console_unlock+0x3f3/0x4d0 Mar 27 15:18:07 s15 kernel: [92480.611381] vprintk_emit+0x2d4/0x380 Mar 27 15:18:07 s15 kernel: [92480.611381] vprintk_default+0x29/0x50 Mar 27 15:18:07 s15 kernel: [92480.611381] vprintk_func+0x20/0x50 Mar 27 15:18:07 s15 kernel: [92480.611381] printk+0x52/0x6e Mar 27 15:18:07 s15 kernel: [92480.611382] rcu_check_callbacks+0x74f/0x8b0 Mar 27 15:18:07 s15 kernel: [92480.611382] ? account_system_index_time+0x63/0x70 Mar 27 15:18:07 s15 kernel: [92480.611382] ? tick_sched_handle.isra.15+0x60/0x60 Mar 27 15:18:07 s15 kernel: [92480.611382] update_process_times+0x2f/0x60 Mar 27 15:18:07 s15 kernel: [92480.611383] tick_sched_handle.isra.15+0x25/0x60 Mar 27 15:18:07 s15 kernel: [92480.611383] tick_sched_timer+0x3d/0x70 Mar 27 15:18:07 s15 kernel: [92480.611383] __hrtimer_run_queues+0xe5/0x250 Mar 27 15:18:07 s15 kernel: [92480.611383] hrtimer_interrupt+0xb1/0x200 Mar 27 15:18:07 s15 kernel: [92480.611383] local_apic_timer_interrupt+0x38/0x60 Mar 27 15:18:07 s15 kernel: [92480.611384] smp_apic_timer_interrupt+0x38/0x50 Mar 27 15:18:07 s15 kernel: [92480.611384] apic_timer_interrupt+0x89/0x90 Mar 27 15:18:07 s15 kernel: [92480.611384] RIP: 0010:native_queued_spin_lock_slowpath+0x17a/0x1a0 Mar 27 15:18:07 s15 kernel: [92480.611384] RSP: 0018:ffffb10c01afbd70 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10 Mar 27 15:18:07 s15 kernel: [92480.611385] RAX: 0000000000000101 RBX: ffff88e6757d7e10 RCX: 0000000000000001 Mar 27 15:18:07 s15 kernel: [92480.611385] RDX: 0000000000000101 RSI: 0000000000000001 RDI: ffffe4f740d5f5f0 Mar 27 15:18:07 s15 kernel: [92480.611385] RBP: ffffb10c01afbd70 R08: 0000000000000101 R09: ffff88e91e5c7b48 Mar 27 15:18:07 s15 kernel: [92480.611385] R10: 0000000000000000 R11: 00000000000003bd R12: ffffe4f740d5f5f0 Mar 27 15:18:07 s15 kernel: [92480.611386] R13: 0000000000000004 R14: ffff88e91e5c7b48 R15: ffffc00000000fff Mar 27 15:18:07 s15 kernel: [92480.611386] </IRQ> Mar 27 15:18:07 s15 kernel: [92480.611386] _raw_spin_lock+0x20/0x30 Mar 27 15:18:07 s15 kernel: [92480.611386] follow_page_pte+0x10c/0x650 Mar 27 15:18:07 s15 kernel: [92480.611386] follow_page_mask+0x1ee/0x5b0 Mar 27 15:18:07 s15 kernel: [92480.611387] ? find_vma+0x68/0x70 Mar 27 15:18:07 s15 kernel: [92480.611387] ksm_scan_thread+0xc08/0x12a0 Mar 27 15:18:07 s15 kernel: [92480.611387] ? wake_atomic_t_function+0x60/0x60 Mar 27 15:18:07 s15 kernel: [92480.611387] kthread+0x101/0x140 Mar 27 15:18:07 s15 kernel: [92480.611387] ? try_to_merge_with_ksm_page+0xa0/0xa0 Mar 27 15:18:07 s15 kernel: [92480.611388] ? kthread_create_on_node+0x60/0x60 Mar 27 15:18:07 s15 kernel: [92480.611388] ret_from_fork+0x2c/0x40 Mar 27 15:18:07 s15 kernel: [92480.611388] Code: 4d 89 f0 b9 08 00 00 00 89 5d d0 4d 8d 2c 07 eb 2c 41 0f be 00 29 f9 4c 8d 62 04 d3 f8 44 21 d8 41 8b 1c 82 44 21 cb 89 d8 31 f0 <89> 02 85 c9 75 09 49 83 c0 01 b9 08 00 00 00 4c 89 e2 49 39 d5 Mar 27 15:18:07 s15 kernel: [92480.682314] NMI backtrace for cpu 2 Mar 27 15:18:07 s15 kernel: [92480.683111] CPU: 2 PID: 64 Comm: ksmd Tainted: G D L 4.11.0-rc2-stock #218 Mar 27 15:18:07 s15 kernel: [92480.683894] Hardware name: System manufacturer System Product Name/P8Z68-M PRO, BIOS 4003 05/09/2013 Mar 27 15:18:07 s15 kernel: [92480.684685] Call Trace: Mar 27 15:18:07 s15 kernel: [92480.685523] <IRQ> Mar 27 15:18:07 s15 kernel: [92480.686304] dump_stack+0x63/0x90 Mar 27 15:18:07 s15 kernel: [92480.687092] nmi_cpu_backtrace+0x95/0xa0 Mar 27 15:18:07 s15 kernel: [92480.687849] ? irq_force_complete_move+0x140/0x140 Mar 27 15:18:07 s15 kernel: [92480.688609] nmi_trigger_cpumask_backtrace+0xe7/0x120 Mar 27 15:18:07 s15 kernel: [92480.689418] arch_trigger_cpumask_backtrace+0x19/0x20 Mar 27 15:18:07 s15 kernel: [92480.690179] rcu_dump_cpu_stacks+0x9d/0xda Mar 27 15:18:07 s15 kernel: [92480.690955] rcu_check_callbacks+0x75f/0x8b0 Mar 27 15:18:07 s15 kernel: [92480.691704] ? account_system_index_time+0x63/0x70 Mar 27 15:18:07 s15 kernel: [92480.692449] ? tick_sched_handle.isra.15+0x60/0x60 Mar 27 15:18:07 s15 kernel: [92480.693283] update_process_times+0x2f/0x60 Mar 27 15:18:07 s15 kernel: [92480.694016] tick_sched_handle.isra.15+0x25/0x60 Mar 27 15:18:07 s15 kernel: [92480.694771] tick_sched_timer+0x3d/0x70 Mar 27 15:18:07 s15 kernel: [92480.695500] __hrtimer_run_queues+0xe5/0x250 Mar 27 15:18:07 s15 kernel: [92480.696224] hrtimer_interrupt+0xb1/0x200 Mar 27 15:18:07 s15 kernel: [92480.696998] local_apic_timer_interrupt+0x38/0x60 Mar 27 15:18:07 s15 kernel: [92480.697743] smp_apic_timer_interrupt+0x38/0x50 Mar 27 15:18:07 s15 kernel: [92480.698502] apic_timer_interrupt+0x89/0x90 Mar 27 15:18:07 s15 kernel: [92480.699240] RIP: 0010:native_queued_spin_lock_slowpath+0x17a/0x1a0 Mar 27 15:18:07 s15 kernel: [92480.699990] RSP: 0018:ffffb10c01afbd70 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10 Mar 27 15:18:07 s15 kernel: [92480.700820] RAX: 0000000000000101 RBX: ffff88e6757d7e10 RCX: 0000000000000001 Mar 27 15:18:07 s15 kernel: [92480.701592] RDX: 0000000000000101 RSI: 0000000000000001 RDI: ffffe4f740d5f5f0 Mar 27 15:18:07 s15 kernel: [92480.702379] RBP: ffffb10c01afbd70 R08: 0000000000000101 R09: ffff88e91e5c7b48 Mar 27 15:18:07 s15 kernel: [92480.703184] R10: 0000000000000000 R11: 00000000000003bd R12: ffffe4f740d5f5f0 Mar 27 15:18:07 s15 kernel: [92480.703970] R13: 0000000000000004 R14: ffff88e91e5c7b48 R15: ffffc00000000fff Mar 27 15:18:07 s15 kernel: [92480.704811] </IRQ> Mar 27 15:18:07 s15 kernel: [92480.705605] _raw_spin_lock+0x20/0x30 Mar 27 15:18:07 s15 kernel: [92480.706431] follow_page_pte+0x10c/0x650 Mar 27 15:18:07 s15 kernel: [92480.707233] follow_page_mask+0x1ee/0x5b0 Mar 27 15:18:07 s15 kernel: [92480.708092] ? find_vma+0x68/0x70 Mar 27 15:18:07 s15 kernel: [92480.708918] ksm_scan_thread+0xc08/0x12a0 Mar 27 15:18:07 s15 kernel: [92480.709720] ? wake_atomic_t_function+0x60/0x60 Mar 27 15:18:07 s15 kernel: [92480.710557] kthread+0x101/0x140 Mar 27 15:18:07 s15 kernel: [92480.711364] ? try_to_merge_with_ksm_page+0xa0/0xa0 Mar 27 15:18:07 s15 kernel: [92480.712221] ? kthread_create_on_node+0x60/0x60 Mar 27 15:18:07 s15 kernel: [92480.713038] ret_from_fork+0x2c/0x40 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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