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Message-ID: <20250612074157.GO10669@unreal> Date: Thu, 12 Jun 2025 10:41:57 +0300 From: Leon Romanovsky <leon@...nel.org> To: K Prateek Nayak <kprateek.nayak@....com> Cc: Steve Wahl <steve.wahl@....com>, Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org>, Juri Lelli <juri.lelli@...hat.com>, Vincent Guittot <vincent.guittot@...aro.org>, Dietmar Eggemann <dietmar.eggemann@....com>, Steven Rostedt <rostedt@...dmis.org>, Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>, Valentin Schneider <vschneid@...hat.com>, linux-kernel@...r.kernel.org, Vishal Chourasia <vishalc@...ux.ibm.com>, samir <samir@...ux.ibm.com>, Naman Jain <namjain@...ux.microsoft.com>, Saurabh Singh Sengar <ssengar@...ux.microsoft.com>, srivatsa@...il.mit.edu, Michael Kelley <mhklinux@...look.com>, Russ Anderson <rja@....com>, Dimitri Sivanich <sivanich@....com> Subject: Re: [PATCH v4 1/2] sched/topology: improve topology_span_sane speed On Wed, Jun 11, 2025 at 12:26:53PM +0530, K Prateek Nayak wrote: > Hello Leon, > > On 6/11/2025 11:36 AM, Leon Romanovsky wrote: > > > I don't think that's the full dmesg output, maybe a console capture > > > with reduced levels? I'm not finding the output of sched_domain_debug() and > > > sched_domain_debug_one() here. > > It is not reduced, but standard debug level log, where KERN_DEBUG prints > > aren't printed. > > > > I don't know why sched_verbose is implemented how it is implemented, > > but all these KERN_DEBUG prints in sched_domain_debug_one() are not controlled > > through sched_verbose. > > Sorry for this oversight! Would it be possible to get the logs with > "ignore_loglevel" added to the kernel cmdline? Please and thank you. [ 0.000000] Linux version 6.16.0-rc1_for_upstream_min_debug_2025_06_09_14_44 (svc-nbu-sw-nic@...nel-build-19019-747zt-3xglw-0bkcj) (gcc (GCC) 14.2.1 20240912 (Red Hat 14.2.1-3), GNU ld version 2.41-38.fc40) #1 SMP Mon Jun 9 11:49:32 UTC 2025 [ 0.000000] Command line: BOOT_IMAGE=(hd0,msdos1)/boot/vmlinuz-6.16.0-rc1_for_upstream_min_debug_2025_06_09_14_44 root=UUID=49650207-5673-41e8-9f3b-5572de97a271 ro selinux=0 kasan_multi_shot net.ifnames=0 biosdevname=0 console=tty0 console=ttyS1,115200 audit=0 systemd.unified_cgroup_hierarchy=0 sched_verbose ignore_loglevel [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable [ 0.000000] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved [ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000007ffdbfff] usable [ 0.000000] BIOS-e820: [mem 0x000000007ffdc000-0x000000007fffffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000b0000000-0x00000000bfffffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fed1c000-0x00000000fed1ffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000feffc000-0x00000000feffffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fffc0000-0x00000000ffffffff] reserved [ 0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000043fffffff] usable [ 0.000000] printk: debug: ignoring loglevel setting. [ 0.000000] NX (Execute Disable) protection: active [ 0.000000] APIC: Static calls initialized [ 0.000000] SMBIOS 2.8 present. [ 0.000000] DMI: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 [ 0.000000] DMI: Memory slots populated: 1/1 [ 0.000000] Hypervisor detected: KVM [ 0.000000] kvm-clock: Using msrs 4b564d01 and 4b564d00 [ 0.000000] kvm-clock: using sched offset of 68382447374 cycles [ 0.000002] clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns [ 0.000008] tsc: Detected 2593.904 MHz processor [ 0.000797] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved [ 0.000799] e820: remove [mem 0x000a0000-0x000fffff] usable [ 0.000802] last_pfn = 0x440000 max_arch_pfn = 0x400000000 [ 0.000830] MTRR map: 4 entries (3 fixed + 1 variable; max 19), built from 8 variable MTRRs [ 0.000834] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT [ 0.000869] last_pfn = 0x7ffdc max_arch_pfn = 0x400000000 [ 0.000878] Using GB pages for direct mapping [ 0.001019] RAMDISK: [mem 0x3572a000-0x36b8cfff] [ 0.001023] ACPI: Early table checksum verification disabled [ 0.001036] ACPI: RSDP 0x00000000000F59B0 000014 (v00 BOCHS ) [ 0.001040] ACPI: RSDT 0x000000007FFE22A8 00003C (v01 BOCHS BXPCRSDT 00000001 BXPC 00000001) [ 0.001050] ACPI: FACP 0x000000007FFE1E53 0000F4 (v03 BOCHS BXPCFACP 00000001 BXPC 00000001) [ 0.001056] ACPI: DSDT 0x000000007FFDFC40 002213 (v01 BOCHS BXPCDSDT 00000001 BXPC 00000001) [ 0.001059] ACPI: FACS 0x000000007FFDFC00 000040 [ 0.001062] ACPI: APIC 0x000000007FFE1F47 0000C0 (v01 BOCHS BXPCAPIC 00000001 BXPC 00000001) [ 0.001065] ACPI: HPET 0x000000007FFE2007 000038 (v01 BOCHS BXPCHPET 00000001 BXPC 00000001) [ 0.001068] ACPI: SRAT 0x000000007FFE203F 0001E8 (v01 BOCHS BXPCSRAT 00000001 BXPC 00000001) [ 0.001071] ACPI: SLIT 0x000000007FFE2227 000045 (v01 BOCHS BXPCSLIT 00000001 BXPC 00000001) [ 0.001074] ACPI: MCFG 0x000000007FFE226C 00003C (v01 BOCHS BXPCMCFG 00000001 BXPC 00000001) [ 0.001076] ACPI: Reserving FACP table memory at [mem 0x7ffe1e53-0x7ffe1f46] [ 0.001078] ACPI: Reserving DSDT table memory at [mem 0x7ffdfc40-0x7ffe1e52] [ 0.001079] ACPI: Reserving FACS table memory at [mem 0x7ffdfc00-0x7ffdfc3f] [ 0.001079] ACPI: Reserving APIC table memory at [mem 0x7ffe1f47-0x7ffe2006] [ 0.001080] ACPI: Reserving HPET table memory at [mem 0x7ffe2007-0x7ffe203e] [ 0.001080] ACPI: Reserving SRAT table memory at [mem 0x7ffe203f-0x7ffe2226] [ 0.001081] ACPI: Reserving SLIT table memory at [mem 0x7ffe2227-0x7ffe226b] [ 0.001082] ACPI: Reserving MCFG table memory at [mem 0x7ffe226c-0x7ffe22a7] [ 0.001132] ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff] [ 0.001134] ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0x7fffffff] [ 0.001135] ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x13fffffff] [ 0.001136] ACPI: SRAT: Node 1 PXM 1 [mem 0x140000000-0x1ffffffff] [ 0.001137] ACPI: SRAT: Node 2 PXM 2 [mem 0x200000000-0x2bfffffff] [ 0.001138] ACPI: SRAT: Node 3 PXM 3 [mem 0x2c0000000-0x37fffffff] [ 0.001138] ACPI: SRAT: Node 4 PXM 4 [mem 0x380000000-0x43fffffff] [ 0.001141] NUMA: Initialized distance table, cnt=5 [ 0.001143] NUMA: Node 0 [mem 0x00001000-0x0009ffff] + [mem 0x00100000-0x7fffffff] -> [mem 0x00001000-0x7fffffff] [ 0.001145] NUMA: Node 0 [mem 0x00001000-0x7fffffff] + [mem 0x100000000-0x13fffffff] -> [mem 0x00001000-0x13fffffff] [ 0.001150] NODE_DATA(0) allocated [mem 0x13fffc800-0x13fffffff] [ 0.001156] NODE_DATA(1) allocated [mem 0x1ffffc800-0x1ffffffff] [ 0.001161] NODE_DATA(2) allocated [mem 0x2bfffc800-0x2bfffffff] [ 0.001165] NODE_DATA(3) allocated [mem 0x37fffc800-0x37fffffff] [ 0.001170] NODE_DATA(4) allocated [mem 0x43fff9800-0x43fffcfff] [ 0.001204] Zone ranges: [ 0.001205] DMA [mem 0x0000000000001000-0x0000000000ffffff] [ 0.001206] DMA32 [mem 0x0000000001000000-0x00000000ffffffff] [ 0.001208] Normal [mem 0x0000000100000000-0x000000043fffffff] [ 0.001209] Movable zone start for each node [ 0.001209] Early memory node ranges [ 0.001210] node 0: [mem 0x0000000000001000-0x000000000009efff] [ 0.001212] node 0: [mem 0x0000000000100000-0x000000007ffdbfff] [ 0.001213] node 0: [mem 0x0000000100000000-0x000000013fffffff] [ 0.001214] node 1: [mem 0x0000000140000000-0x00000001ffffffff] [ 0.001215] node 2: [mem 0x0000000200000000-0x00000002bfffffff] [ 0.001216] node 3: [mem 0x00000002c0000000-0x000000037fffffff] [ 0.001217] node 4: [mem 0x0000000380000000-0x000000043fffffff] [ 0.001218] Initmem setup node 0 [mem 0x0000000000001000-0x000000013fffffff] [ 0.001220] Initmem setup node 1 [mem 0x0000000140000000-0x00000001ffffffff] [ 0.001221] Initmem setup node 2 [mem 0x0000000200000000-0x00000002bfffffff] [ 0.001222] Initmem setup node 3 [mem 0x00000002c0000000-0x000000037fffffff] [ 0.001223] Initmem setup node 4 [mem 0x0000000380000000-0x000000043fffffff] [ 0.001227] On node 0, zone DMA: 1 pages in unavailable ranges [ 0.001263] On node 0, zone DMA: 97 pages in unavailable ranges [ 0.007283] On node 0, zone Normal: 36 pages in unavailable ranges [ 0.032111] ACPI: PM-Timer IO Port: 0x608 [ 0.032126] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1]) [ 0.032160] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23 [ 0.032164] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl) [ 0.032166] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level) [ 0.032167] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level) [ 0.032173] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level) [ 0.032174] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level) [ 0.032179] ACPI: Using ACPI (MADT) for SMP configuration information [ 0.032180] ACPI: HPET id: 0x8086a201 base: 0xfed00000 [ 0.032184] TSC deadline timer available [ 0.032188] CPU topo: Max. logical packages: 10 [ 0.032189] CPU topo: Max. logical dies: 10 [ 0.032189] CPU topo: Max. dies per package: 1 [ 0.032194] CPU topo: Max. threads per core: 1 [ 0.032194] CPU topo: Num. cores per package: 1 [ 0.032195] CPU topo: Num. threads per package: 1 [ 0.032195] CPU topo: Allowing 10 present CPUs plus 0 hotplug CPUs [ 0.032209] kvm-guest: APIC: eoi() replaced with kvm_guest_apic_eoi_write() [ 0.032217] kvm-guest: KVM setup pv remote TLB flush [ 0.032219] kvm-guest: setup PV sched yield [ 0.032234] [mem 0xc0000000-0xfed1bfff] available for PCI devices [ 0.032237] Booting paravirtualized kernel on KVM [ 0.032238] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645519600211568 ns [ 0.036873] setup_percpu: NR_CPUS:512 nr_cpumask_bits:10 nr_cpu_ids:10 nr_node_ids:5 [ 0.038028] percpu: Embedded 53 pages/cpu s177240 r8192 d31656 u1048576 [ 0.038033] pcpu-alloc: s177240 r8192 d31656 u1048576 alloc=1*2097152 [ 0.038035] pcpu-alloc: [0] 00 01 [1] 02 03 [2] 04 05 [3] 06 07 [ 0.038040] pcpu-alloc: [4] 08 09 [ 0.038062] Kernel command line: BOOT_IMAGE=(hd0,msdos1)/boot/vmlinuz-6.16.0-rc1_for_upstream_min_debug_2025_06_09_14_44 root=UUID=49650207-5673-41e8-9f3b-5572de97a271 ro selinux=0 kasan_multi_shot net.ifnames=0 biosdevname=0 console=tty0 console=ttyS1,115200 audit=0 systemd.unified_cgroup_hierarchy=0 sched_verbose ignore_loglevel [ 0.038186] Unknown kernel command line parameters "kasan_multi_shot BOOT_IMAGE=(hd0,msdos1)/boot/vmlinuz-6.16.0-rc1_for_upstream_min_debug_2025_06_09_14_44 selinux=0 biosdevname=0 audit=0", will be passed to user space. [ 0.038199] random: crng init done [ 0.038200] printk: log_buf_len individual max cpu contribution: 4096 bytes [ 0.038201] printk: log_buf_len total cpu_extra contributions: 36864 bytes [ 0.038201] printk: log_buf_len min size: 65536 bytes [ 0.038295] printk: log buffer data + meta data: 131072 + 458752 = 589824 bytes [ 0.038296] printk: early log buf free: 56704(86%) [ 0.038437] software IO TLB: area num 16. [ 0.049582] Fallback order for Node 0: 0 4 3 2 1 [ 0.049586] Fallback order for Node 1: 1 4 3 2 0 [ 0.049588] Fallback order for Node 2: 2 4 3 0 1 [ 0.049591] Fallback order for Node 3: 3 4 1 0 2 [ 0.049593] Fallback order for Node 4: 4 0 1 2 3 [ 0.049598] Built 5 zonelists, mobility grouping on. Total pages: 3932026 [ 0.049599] Policy zone: Normal [ 0.049601] mem auto-init: stack:off, heap alloc:off, heap free:off [ 0.073185] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=10, Nodes=5 [ 0.082951] ftrace: allocating 46168 entries in 182 pages [ 0.082953] ftrace: allocated 182 pages with 5 groups [ 0.083097] rcu: Hierarchical RCU implementation. [ 0.083098] rcu: RCU restricting CPUs from NR_CPUS=512 to nr_cpu_ids=10. [ 0.083099] Rude variant of Tasks RCU enabled. [ 0.083100] Tracing variant of Tasks RCU enabled. [ 0.083100] rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies. [ 0.083101] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=10 [ 0.083110] RCU Tasks Rude: Setting shift to 4 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=10. [ 0.083112] RCU Tasks Trace: Setting shift to 4 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=10. [ 0.089648] NR_IRQS: 33024, nr_irqs: 504, preallocated irqs: 16 [ 0.089836] rcu: srcu_init: Setting srcu_struct sizes based on contention. [ 0.100697] Console: colour VGA+ 80x25 [ 0.100700] printk: legacy console [tty0] enabled [ 0.132430] printk: legacy console [ttyS1] enabled [ 0.229785] ACPI: Core revision 20250404 [ 0.230478] clocksource: hpet: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604467 ns [ 0.231809] APIC: Switch to symmetric I/O mode setup [ 0.232506] kvm-guest: APIC: send_IPI_mask() replaced with kvm_send_ipi_mask() [ 0.233506] kvm-guest: APIC: send_IPI_mask_allbutself() replaced with kvm_send_ipi_mask_allbutself() [ 0.234730] kvm-guest: setup PV IPIs [ 0.236077] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1 [ 0.236911] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x2563bd843df, max_idle_ns: 440795257314 ns [ 0.238295] Calibrating delay loop (skipped) preset value.. 5187.80 BogoMIPS (lpj=10375616) [ 0.242677] x86/cpu: User Mode Instruction Prevention (UMIP) activated [ 0.243537] Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0 [ 0.244273] Last level dTLB entries: 4KB 0, 2MB 0, 4MB 0, 1GB 0 [ 0.245073] Speculative Store Bypass: Vulnerable [ 0.245714] GDS: Unknown: Dependent on hypervisor status [ 0.246511] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers' [ 0.247580] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers' [ 0.248414] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers' [ 0.250296] x86/fpu: Supporting XSAVE feature 0x008: 'MPX bounds registers' [ 0.251201] x86/fpu: Supporting XSAVE feature 0x010: 'MPX CSR' [ 0.251970] x86/fpu: Supporting XSAVE feature 0x020: 'AVX-512 opmask' [ 0.254507] x86/fpu: Supporting XSAVE feature 0x040: 'AVX-512 Hi256' [ 0.255330] x86/fpu: Supporting XSAVE feature 0x080: 'AVX-512 ZMM_Hi256' [ 0.256198] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256 [ 0.257000] x86/fpu: xstate_offset[3]: 832, xstate_sizes[3]: 64 [ 0.257814] x86/fpu: xstate_offset[4]: 896, xstate_sizes[4]: 64 [ 0.258503] x86/fpu: xstate_offset[5]: 960, xstate_sizes[5]: 64 [ 0.259316] x86/fpu: xstate_offset[6]: 1024, xstate_sizes[6]: 512 [ 0.260115] x86/fpu: xstate_offset[7]: 1536, xstate_sizes[7]: 1024 [ 0.260921] x86/fpu: Enabled xstate features 0xff, context size is 2560 bytes, using 'compacted' format. [ 0.262998] Freeing SMP alternatives memory: 48K [ 0.263638] pid_max: default: 32768 minimum: 301 [ 0.264305] LSM: initializing lsm=capability [ 0.264928] stackdepot: allocating hash table of 1048576 entries via kvcalloc [ 0.272932] Dentry cache hash table entries: 2097152 (order: 12, 16777216 bytes, vmalloc hugepage) [ 0.275571] Inode-cache hash table entries: 1048576 (order: 11, 8388608 bytes, vmalloc hugepage) [ 0.276757] Mount-cache hash table entries: 32768 (order: 6, 262144 bytes, vmalloc) [ 0.277798] Mountpoint-cache hash table entries: 32768 (order: 6, 262144 bytes, vmalloc) [ 0.278910] smpboot: CPU0: Intel(R) Xeon(R) Gold 6240 CPU @ 2.60GHz (family: 0x6, model: 0x55, stepping: 0x7) [ 0.280313] Performance Events: Skylake events, full-width counters, Intel PMU driver. [ 0.281375] ... version: 2 [ 0.281946] ... bit width: 48 [ 0.282295] ... generic registers: 4 [ 0.282463] ... value mask: 0000ffffffffffff [ 0.283187] ... max period: 00007fffffffffff [ 0.283911] ... fixed-purpose events: 3 [ 0.284485] ... event mask: 000000070000000f [ 0.285356] signal: max sigframe size: 3216 [ 0.285969] rcu: Hierarchical SRCU implementation. [ 0.286476] rcu: Max phase no-delay instances is 1000. [ 0.287216] Timer migration: 2 hierarchy levels; 8 children per group; 1 crossnode level [ 0.288498] smp: Bringing up secondary CPUs ... [ 0.289225] smpboot: x86: Booting SMP configuration: [ 0.289900] .... node #0, CPUs: #1 [ 0.290511] .... node #1, CPUs: #2 #3 [ 0.291559] .... node #2, CPUs: #4 #5 [ 0.292557] .... node #3, CPUs: #6 #7 [ 0.293593] .... node #4, CPUs: #8 #9 [ 0.326310] smp: Brought up 5 nodes, 10 CPUs [ 0.327532] smpboot: Total of 10 processors activated (51878.08 BogoMIPS) [ 0.329252] ------------[ cut here ]------------ [ 0.329252] WARNING: CPU: 0 PID: 1 at kernel/sched/topology.c:2486 build_sched_domains+0xe67/0x13a0 [ 0.330608] Modules linked in: [ 0.331050] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.16.0-rc1_for_upstream_min_debug_2025_06_09_14_44 #1 NONE [ 0.332386] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 [ 0.333767] RIP: 0010:build_sched_domains+0xe67/0x13a0 [ 0.334298] Code: ff ff 8b 6c 24 08 48 8b 44 24 68 65 48 2b 05 60 24 d0 01 0f 85 03 05 00 00 48 83 c4 70 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 <0f> 0b e9 65 fe ff ff 48 c7 c7 28 fb 08 82 4c 89 44 24 28 c6 05 e4 [ 0.336635] RSP: 0000:ffff8881002efe30 EFLAGS: 00010202 [ 0.337326] RAX: 00000000ffffff01 RBX: 0000000000000002 RCX: 00000000ffffff01 [ 0.338234] RDX: 00000000fffffff6 RSI: 0000000000000300 RDI: ffff888100047168 [ 0.338523] RBP: 0000000000000000 R08: ffff888100047168 R09: 0000000000000000 [ 0.339425] R10: ffffffff830dee80 R11: 0000000000000000 R12: ffff888100047168 [ 0.340323] R13: 0000000000000002 R14: ffff888100193480 R15: ffff888380030f40 [ 0.341221] FS: 0000000000000000(0000) GS:ffff8881b9b76000(0000) knlGS:0000000000000000 [ 0.342298] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.343096] CR2: ffff88843ffff000 CR3: 000000000282c001 CR4: 0000000000370eb0 [ 0.344042] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 0.344927] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 0.345811] Call Trace: [ 0.346191] <TASK> [ 0.346429] sched_init_smp+0x32/0xa0 [ 0.346944] ? stop_machine+0x2c/0x40 [ 0.347460] kernel_init_freeable+0xf5/0x260 [ 0.348031] ? rest_init+0xc0/0xc0 [ 0.348513] kernel_init+0x16/0x120 [ 0.349008] ret_from_fork+0x5e/0xd0 [ 0.349510] ? rest_init+0xc0/0xc0 [ 0.349998] ret_from_fork_asm+0x11/0x20 [ 0.350464] </TASK> [ 0.350812] ---[ end trace 0000000000000000 ]--- > > Even the qemu cmdline for the guest can help! We can try reproducing > it at our end then. Thank you for all the help. It is custom QEMU with limited access to hypervisor. This crash is inside VM. Thanks > > -- > Thanks and Regards, > Prateek >
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