Sorry Konrad for late response. It was nearly swallowed up until Chao reminds me. > -----Original Message----- > From: Konrad Rzeszutek Wilk [mailto:konrad.wilk@oracle.com] > Sent: Monday, August 4, 2014 10:00 PM > To: Hu, Robert > Cc: xen-devel@lists.xen.org; Zhou, Chao > Subject: Re: [Xen-devel] VMX test report for Xen 4.5-unstable-C/S 28634 > > On Mon, Mar 31, 2014 at 08:52:54AM +0000, Hu, Robert wrote: > > Hi All, > > This is a report based on our testing for Xen 4.5-unstable on Intel platforms. > > Test environment: > > Xen: Xen 4.5-unstable with qemu-upstream-unstable.git > > Changeset: 28634:b75cbf39ebe4 > > Dom0: Linux kernel 3.13.7 > > Hardware: Intel Sandy Bridge, Ivy Bridge, Haswell > > > > Newly-and-Open bugs (0): > > > > Reopened bug(1) > > 1. Guest hang after resume from S3 > > http://bugzilla-archived.xenproject.org//bugzilla/show_bug.cgi?id=1828 > > Hey Hu, > > Considering that Liu is no long working for Intel and in the past he > had been working on this bug: > - Is there somebody else from Intel who is looking at this? Not until now we'll get some one look into. > - Is this still an issue? (It looks like yes - as you have to compile the guest > without CONFIG_XEN_PVHVM? - but that implies a Linux issue not > hypervisor - btw in 3.17 there will be an 'xen_nopv' bootline parameter > that will disable the PV drivers/codepaths in HVM guests). > > If this is an issue, could you post the details fully on xen-devel so > that we can open a tracker bug instead of using the bugzilla system? > Yes, this is still an issue, even with CONFIG_XEN_PVHVM=y. I just retest this on latest Xen commit 8b24b07e, with Dom0 stable kernel 3.15.8, as well as guest kernel. Attached is guest kernel config file. > Thank you! Environment: ------------ Service Arch (ia32/ia32e/IA64): ia32e Guest Arch (ia32/ia32e/IA64): ia32e Guest OS Type (Linux/Windows): Linux Commit No.: 8b24b07e Hardware: Ivytown-EP Other: Bug detailed description: -------------------------- Guest hang after resume from S3. We see call trace from guest console after we 'xl trigger $domid s3resume'. Reproduce steps: ---------------- 1. Start a rhel6u5 guest, with kernel 3.15.8 in our test. 2. Suspend guest via 'echo mem > /sys/power/state' command. 3. Resume guest from dom0 via 'xl trigger $domid s3resume' command. 4. Verify guest works fine via ping and ssh from dom0. 5. Check guest's base info(such as ifconfig). Current result: ---------------- Step 4: Guest isn't successfully awaken. We see call trace from guest console. Expected result: ---------------- Guest can be waked up and works fine. Call trace we captured ----------------- Last login: Wed Aug 6 14:59:59 on ttyS0 [root@rhel6 ~]# [ 73.356160] PM: Syncing filesystems ... done. [ 73.525388] Freezing user space processes ... (elapsed 0.001 seconds) done. [ 73.534449] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done. [ 73.545581] Suspending console(s) (use no_console_suspend to debug) [ 73.554958] PM: suspend of devices complete after 3.652 msecs [ 73.555104] PM: late suspend of devices complete after 0.144 msecs [ 73.559043] PM: noirq suspend of devices complete after 3.937 msecs [ 73.559046] ACPI: Preparing to enter system sleep state S3 [ 73.559183] PM: Saving platform NVS memory [ 73.559183] Disabling non-boot CPUs ... [ 73.560863] smpboot: CPU 1 is now offline [ 73.562594] smpboot: CPU 2 is now offline [ 73.564262] smpboot: CPU 3 is now offline [ 73.565220] ACPI: Low-level resume complete [ 73.565220] ACPI Exception: AE_NOT_FOUND, While evaluating Sleep State [\_S0_] (20140214/hwxface-580) [ 73.565220] PM: Restoring platform NVS memory [ 73.565220] Enabling non-boot CPUs ... [ 73.565220] x86: Booting SMP configuration: [ 73.565220] smpboot: Booting Node 0 Processor 1 APIC 0x2 [ 73.578993] cpu 1 spinlock event irq 74 [ 73.579214] CPU1 is up [ 73.579316] smpboot: Booting Node 0 Processor 2 APIC 0x4 [ 73.580206] cpu 2 spinlock event irq 79 [ 73.593680] CPU2 is up [ 73.593781] smpboot: Booting Node 0 Processor 3 APIC 0x6 [ 73.594672] cpu 3 spinlock event irq 84 [ 73.608201] CPU3 is up [ 73.630088] ACPI: Waking up from system sleep state S3 [ 73.641880] PM: noirq resume of devices complete after 11.456 msecs [ 73.642040] PM: early resume of devices complete after 0.082 msecs [ 73.642124] pci 0000:00:01.0: PIIX3: Enabling Passive Release [ 73.644845] xen:grant_table: WARNING: g.e. 0x324 still in use! [ 73.644849] xen:grant_table: WARNING: g.e. 0x341 still in use! [ 73.644850] xen:grant_table: WARNING: g.e. 0x308 still in use! [ 73.644852] xen:grant_table: WARNING: g.e. 0x336 still in use! [ 73.644853] xen:grant_table: WARNING: g.e. 0x30d still in use! [ 73.644854] xen:grant_table: WARNING: g.e. 0x349 still in use! [ 73.644856] xen:grant_table: WARNING: g.e. 0x334 still in use! [ 73.644857] xen:grant_table: WARNING: g.e. 0x306 still in use! [ 73.644858] xen:grant_table: WARNING: g.e. 0x320 still in use! [ 73.644859] xen:grant_table: WARNING: g.e. 0x9 still in use! [ 73.644861] xen:grant_table: WARNING: g.e. 0x314 still in use! [ 73.644862] xen:grant_table: WARNING: g.e. 0x340 still in use! [ 73.644863] xen:grant_table: WARNING: g.e. 0x355 still in use! [ 73.644864] xen:grant_table: WARNING: g.e. 0x305 still in use! [ 73.644866] xen:grant_table: WARNING: g.e. 0x35a still in use! [ 73.644867] xen:grant_table: WARNING: g.e. 0x31a still in use! [ 73.644868] xen:grant_table: WARNING: g.e. 0x32c still in use! [ 73.644869] xen:grant_table: WARNING: g.e. 0x317 still in use! [ 73.644870] xen:grant_table: WARNING: g.e. 0x304 still in use! [ 73.644871] xen:grant_table: WARNING: g.e. 0x303 still in use! [ 73.644872] xen:grant_table: WARNING: g.e. 0x32f still in use! [ 73.644874] xen:grant_table: WARNING: g.e. 0x30e still in use! [ 73.644875] xen:grant_table: WARNING: g.e. 0x328 still in use! [ 73.644876] xen:grant_table: WARNING: g.e. 0x33f still in use! [ 73.644878] xen:grant_table: WARNING: g.e. 0x31b still in use! [ 73.644879] xen:grant_table: WARNING: g.e. 0x333 still in use! [ 73.644880] xen:grant_table: WARNING: g.e. 0x30b still in use! [ 73.644881] xen:grant_table: WARNING: g.e. 0x337 still in use! [ 73.644882] xen:grant_table: WARNING: g.e. 0x348 still in use! [ 73.644883] xen:grant_table: WARNING: g.e. 0x32a still in use! [ 73.644884] xen:grant_table: WARNING: g.e. 0x342 still in use! [ 73.644885] xen:grant_table: WARNING: g.e. 0x31e still in use! [ 73.644887] xen:grant_table: WARNING: g.e. 0x31d still in use! [ 73.644891] xen:grant_table: WARNING: g.e. 0x30f still in use! [ 73.644892] xen:grant_table: WARNING: g.e. 0x35c still in use! [ 73.644893] xen:grant_table: WARNING: g.e. 0x311 still in use! [ 73.644894] xen:grant_table: WARNING: g.e. 0x32d still in use! [ 73.644896] xen:grant_table: WARNING: g.e. 0x31c still in use! [ 73.644897] xen:grant_table: WARNING: g.e. 0x335 still in use! [ 73.644898] xen:grant_table: WARNING: g.e. 0x339 still in use! [ 73.644899] xen:grant_table: WARNING: g.e. 0x307 still in use! [ 73.644900] xen:grant_table: WARNING: g.e. 0x34a still in use! [ 73.644901] xen:grant_table: WARNING: g.e. 0x330 still in use! [ 73.644902] xen:grant_table: WARNING: g.e. 0x316 still in use! [ 73.644903] xen:grant_table: WARNING: g.e. 0x358 still in use! [ 73.644904] xen:grant_table: WARNING: g.e. 0x33a still in use! [ 73.644905] xen:grant_table: WARNING: g.e. 0x329 still in use! [ 73.644907] xen:grant_table: WARNING: g.e. 0x30c still in use! [ 73.644908] xen:grant_table: WARNING: g.e. 0x352 still in use! [ 73.644909] xen:grant_table: WARNING: g.e. 0x325 still in use! [ 73.644910] xen:grant_table: WARNING: g.e. 0x344 still in use! [ 73.644915] xen:grant_table: WARNING: g.e. 0x338 still in use! [ 73.644916] xen:grant_table: WARNING: g.e. 0x331 still in use! [ 73.644917] xen:grant_table: WARNING: g.e. 0x359 still in use! [ 73.644918] xen:grant_table: WARNING: g.e. 0x332 still in use! [ 73.644919] xen:grant_table: WARNING: g.e. 0x33b still in use! [ 73.644920] xen:grant_table: WARNING: g.e. 0x322 still in use! [ 73.644921] xen:grant_table: WARNING: g.e. 0x35b still in use! [ 73.644923] xen:grant_table: WARNING: g.e. 0x30a still in use! [ 73.644924] xen:grant_table: WARNING: g.e. 0x312 still in use! [ 73.644925] xen:grant_table: WARNING: g.e. 0x326 still in use! [ 73.644926] xen:grant_table: WARNING: g.e. 0x33d still in use! [ 73.644927] xen:grant_table: WARNING: g.e. 0x310 still in use! [ 73.644928] xen:grant_table: WARNING: g.e. 0x347 still in use! [ 73.644929] xen:grant_table: WARNING: g.e. 0x309 still in use! [ 73.644931] xen:grant_table: WARNING: g.e. 0x323 still in use! [ 73.644932] xen:grant_table: WARNING: g.e. 0x351 still in use! [ 73.644933] xen:grant_table: WARNING: g.e. 0x346 still in use! [ 73.644934] xen:grant_table: WARNING: g.e. 0x33e still in use! [ 73.644937] xen:grant_table: WARNING: g.e. 0x34c still in use! [ 73.644938] xen:grant_table: WARNING: g.e. 0x34b still in use! [ 73.644939] xen:grant_table: WARNING: g.e. 0x32e still in use! [ 73.644940] xen:grant_table: WARNING: g.e. 0x319 still in use! [ 73.644941] xen:grant_table: WARNING: g.e. 0x34d still in use! [ 73.644942] xen:grant_table: WARNING: g.e. 0x34e still in use! [ 73.644943] xen:grant_table: WARNING: g.e. 0x353 still in use! [ 73.644945] xen:grant_table: WARNING: g.e. 0x343 still in use! [ 73.644945] xen:grant_table: WARNING: g.e. 0x32b still in use! [ 73.644947] xen:grant_table: WARNING: g.e. 0x318 still in use! [ 73.644948] xen:grant_table: WARNING: g.e. 0x313 still in use! [ 73.644949] xen:grant_table: WARNING: g.e. 0x354 still in use! [ 73.644950] xen:grant_table: WARNING: g.e. 0x315 still in use! [ 73.644951] xen:grant_table: WARNING: g.e. 0x31f still in use! [ 73.644952] xen:grant_table: WARNING: g.e. 0x33c still in use! [ 73.644953] xen:grant_table: WARNING: g.e. 0x357 still in use! [ 73.644954] xen:grant_table: WARNING: g.e. 0x356 still in use! [ 73.644957] xen:grant_table: WARNING: g.e. 0x321 still in use! [ 73.644958] xen:grant_table: WARNING: g.e. 0x345 still in use! [ 73.644959] xen:grant_table: WARNING: g.e. 0x350 still in use! [ 73.644960] xen:grant_table: WARNING: g.e. 0x34f still in use! [ 73.644961] xen:grant_table: WARNING: g.e. 0x327 still in use! [ 73.645030] xen:grant_table: WARNING: g.e. 0x8 still in use! [ 73.650803] xen:grant_table: WARNING: g.e. 0x300 still in use! [ 73.650804] xen:grant_table: WARNING: g.e. 0x301 still in use! [ 73.663230] PM: resume of devices complete after 21.188 msecs [ 74.350929] Restarting tasks ... done. [ 94.578054] INFO: rcu_sched detected stalls on CPUs/tasks: { 1} (detected by 0, t=21002 jiffies, g=716, c=715, q=174) [ 94.579048] sending NMI to all CPUs: [ 94.579048] NMI backtrace for cpu 0 [ 94.579048] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.15.8 #1 [ 94.579048] Hardware name: Xen HVM domU, BIOS 4.5-unstable 08/04/2014 [ 94.579048] task: ffffffff81c1b460 ti: ffffffff81c00000 task.ti: ffffffff81c00000 [ 94.579048] RIP: 0010:[] [] default_send_IPI_mask_sequence_phys+0xc0/0x130 [ 94.579048] RSP: 0018:ffff88000d603ba8 EFLAGS: 00000046 [ 94.579048] RAX: 0000000000000400 RBX: 0000000000000002 RCX: 0000000000000000 [ 94.579048] RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000000000300 [ 94.579048] RBP: ffff88000d603be8 R08: ffffffff81cad508 R09: 0000000000000000 [ 94.579048] R10: 00000000000002f1 R11: 00000000000002f1 R12: 000000000000b024 [ 94.579048] R13: ffffffff81cad508 R14: 0000000000000400 R15: 0000000000000082 [ 94.579048] FS: 0000000000000000(0000) GS:ffff88000d600000(0000) knlGS:0000000000000000 [ 94.579048] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 94.579048] CR2: 0000000000ac54c0 CR3: 000000000b276000 CR4: 00000000001406f0 [ 94.579048] Stack: [ 94.579048] 0000000000000000 0000000000000000 ffff88000d603bc8 0000000000000000 [ 94.579048] ffffffff81c38fc0 ffffffff81c39080 0000000000000000 ffffffff81cad500 [ 94.579048] ffff88000d603bf8 ffffffff8109d522 ffff88000d603c18 ffffffff810996f7 [ 94.579048] Call Trace: [ 94.579048] [ 94.579048] [] physflat_send_IPI_all+0x12/0x20 [ 94.579048] [] arch_trigger_all_cpu_backtrace+0x47/0x80 [ 94.579048] [] rcu_check_callbacks+0x692/0x6b0 [ 94.579048] [] update_process_times+0x43/0x80 [ 94.579048] [] tick_sched_handle+0x3c/0x50 [ 94.579048] [] tick_sched_timer+0x4f/0x90 [ 94.579048] [] __run_hrtimer+0x8f/0x1e0 [ 94.579048] [] ? tick_nohz_handler+0xc0/0xc0 [ 94.579048] [] hrtimer_interrupt+0x106/0x280 [ 94.579048] [] xen_timer_interrupt+0x2f/0x130 [ 94.579048] [] handle_irq_event_percpu+0x5d/0x1f0 [ 94.579048] [] handle_percpu_irq+0x43/0x60 [ 94.579048] [] generic_handle_irq+0x22/0x30 [ 94.579048] [] evtchn_fifo_handle_events+0x14c/0x170 [ 94.579048] [] __xen_evtchn_do_upcall+0x48/0x90 [ 94.579048] [] xen_evtchn_do_upcall+0x32/0x50 [ 94.579048] [] xen_hvm_callback_vector+0x6d/0x80 [ 94.579048] [ 94.579048] [] ? sched_clock_cpu+0x98/0xc0 [ 94.579048] [] ? native_safe_halt+0x6/0x10 [ 94.579048] [] default_idle+0x2d/0xd0 [ 94.579048] [] arch_cpu_idle+0xa/0x10 [ 94.579048] [] cpu_startup_entry+0x1a1/0x3e0 [ 94.579048] [] rest_init+0x6d/0x70 [ 94.579048] [] start_kernel+0x49a/0x4a7 [ 94.579048] [] ? repair_env_string+0x5b/0x5b [ 94.579048] [] ? early_idt_handlers+0x117/0x120 [ 94.579048] [] x86_64_start_reservations+0x2a/0x2c [ 94.579048] [] x86_64_start_kernel+0x1ea/0x1f9 [ 94.579048] Code: 0f 1f 00 f3 90 8b 04 25 00 93 5f ff f6 c4 10 75 f2 c1 e1 18 89 0c 25 10 93 5f ff 83 fb 02 44 89 f0 0f 45 c3 89 04 25 00 93 5f ff 9e 41 f7 c7 00 02 00 00 75 23 48 83 3d b5 6f b9 00 00 74 2d [ 74.365746] NMI backtrace for cpu 1 [ 74.365746] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.15.8 #1 [ 74.365746] Hardware name: Xen HVM domU, BIOS 4.5-unstable 08/04/2014 [ 74.365746] task: ffff88000e49cf50 ti: ffff88000e4ec000 task.ti: ffff88000e4ec000 [ 74.365746] RIP: 0010:[] [] native_safe_halt+0x6/0x10 [ 74.365746] RSP: 0018:ffff88000e4efe88 EFLAGS: 00000282 [ 74.365746] RAX: 0000000000000000 RBX: ffff88000e4ec010 RCX: ffff88000e4ec010 [ 74.365746] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 74.365746] RBP: ffff88000e4efe88 R08: 0000000000000000 R09: 0000000000000000 [ 74.365746] R10: 00000000000ed800 R11: 0000000000000000 R12: 0000000000000001 [ 74.365746] R13: ffffffff81cad508 R14: ffff88000e4ec010 R15: 0000000000000000 [ 74.365746] FS: 0000000000000000(0000) GS:ffff88000d620000(0000) knlGS:0000000000000000 [ 74.365746] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.365746] CR2: 00007f465aa759a0 CR3: 000000000c169000 CR4: 00000000001406e0 [ 74.365746] Stack: [ 74.365746] ffff88000e4efea8 ffffffff8106cacd ffff88000e4ec010 ffff88000e4ec010 [ 74.365746] ffff88000e4efeb8 ffffffff8106c14a ffff88000e4eff28 ffffffff810f3831 [ 74.365746] ffff88000d62bdc0 0000000000000282 ffff88000e4ec010 ffff88000e4ec010 [ 74.365746] Call Trace: [ 74.365746] [] default_idle+0x2d/0xd0 [ 74.365746] [] arch_cpu_idle+0xa/0x10 [ 74.365746] [] cpu_startup_entry+0x1a1/0x3e0 [ 74.365746] [] start_secondary+0x19b/0x200 [ 74.365746] Code: 00 00 00 00 00 55 48 89 e5 fa c9 c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 fb c9 c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 fb f4 c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 f4 c9 c3 66 0f 1f 84 [ 74.365709] NMI backtrace for cpu 3 [ 74.365709] CPU: 3 PID: 0 Comm: swapper/3 Not tainted 3.15.8 #1 [ 74.365709] Hardware name: Xen HVM domU, BIOS 4.5-unstable 08/04/2014 [ 74.365709] task: ffff88000e49e0f0 ti: ffff88000e4f4000 task.ti: ffff88000e4f4000 [ 74.365709] RIP: 0010:[] [] native_safe_halt+0x6/0x10 [ 74.365709] RSP: 0018:ffff88000e4f7e88 EFLAGS: 00000282 [ 74.365709] RAX: 0000000000000000 RBX: ffff88000e4f4010 RCX: ffff88000e4f4010 [ 74.365709] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 74.365709] RBP: ffff88000e4f7e88 R08: 0000000000000000 R09: 0000000000000000 [ 74.365709] R10: 00000000000ed800 R11: 0000000000000000 R12: 0000000000000003 [ 74.365709] R13: ffffffff81cad508 R14: ffff88000e4f4010 R15: 0000000000000000 [ 74.365709] FS: 0000000000000000(0000) GS:ffff88000d660000(0000) knlGS:0000000000000000 [ 74.365709] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.365709] CR2: 00007faf6c003ac8 CR3: 000000000c169000 CR4: 00000000001406e0 [ 74.365709] Stack: [ 74.365709] ffff88000e4f7ea8 ffffffff8106cacd ffff88000e4f4010 ffff88000e4f4010 [ 74.365709] ffff88000e4f7eb8 ffffffff8106c14a ffff88000e4f7f28 ffffffff810f3831 [ 74.365709] 0000000000000282 ffff88000e4f7ee0 ffff88000e4f4010 ffff88000e4f4010 [ 74.365709] Call Trace: [ 74.365709] [] default_idle+0x2d/0xd0 [ 74.365709] [] arch_cpu_idle+0xa/0x10 [ 74.365709] [] cpu_startup_entry+0x1a1/0x3e0 [ 74.365709] [] start_secondary+0x19b/0x200 [ 74.365709] Code: 00 00 00 00 00 55 48 89 e5 fa c9 c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 fb c9 c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 fb f4 c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 f4 c9 c3 66 0f 1f 84 [ 74.365731] NMI backtrace for cpu 2 [ 74.365731] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 3.15.8 #1 [ 74.365731] Hardware name: Xen HVM domU, BIOS 4.5-unstable 08/04/2014 [ 74.365731] task: ffff88000e49d820 ti: ffff88000e4f0000 task.ti: ffff88000e4f0000 [ 74.365731] RIP: 0010:[] [] native_safe_halt+0x6/0x10 [ 74.365731] RSP: 0018:ffff88000e4f3e88 EFLAGS: 00000282 [ 74.365731] RAX: 0000000000000000 RBX: ffff88000e4f0010 RCX: ffff88000e4f0010 [ 74.365731] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 74.365731] RBP: ffff88000e4f3e88 R08: 0000000000000000 R09: 0000000000000000 [ 74.365731] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002 [ 74.365731] R13: ffffffff81cad508 R14: ffff88000e4f0010 R15: 0000000000000000 [ 74.365731] FS: 0000000000000000(0000) GS:ffff88000d640000(0000) knlGS:0000000000000000 [ 74.365731] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.365731] CR2: ffffffffff600400 CR3: 000000000c169000 CR4: 00000000001406e0 [ 74.365731] Stack: [ 74.365731] ffff88000e4f3ea8 ffffffff8106cacd ffff88000e4f0010 ffff88000e4f0010 [ 74.365731] ffff88000e4f3eb8 ffffffff8106c14a ffff88000e4f3f28 ffffffff810f3831 [ 74.365731] 0000000000000282 ffff88000e4f3ee0 ffff88000e4f0010 ffff88000e4f0010 [ 74.365731] Call Trace: [ 74.365731] [] default_idle+0x2d/0xd0 [ 74.365731] [] arch_cpu_idle+0xa/0x10 [ 74.365731] [] cpu_startup_entry+0x1a1/0x3e0 [ 74.365731] [] start_secondary+0x19b/0x200 [ 74.365731] Code: 00 00 00 00 00 55 48 89 e5 fa c9 c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 fb c9 c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 fb f4 c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 f4 c9 c3 66 0f 1f 84 [ 94.579048] INFO: NMI handler (arch_trigger_all_cpu_backtrace_handler) took too long to run: 627.500 msecs Best Regards, Robert Ho