Vivek
I tried kdump without acpi_rsdp on your reserved machine. It can not boot similar with the initial report here: http://lists.infradead.org/pipermail/kexec/2010-March/003889.html
Below is the detail kmsg, tried noacpi, noapic, nox2apic, they all does not help on this problem.
[root@intel-canoepass-02 ~]# echo c >/proc/sysrq-trigger [ 288.091055] SysRq : Trigger a crash [ 288.094991] BUG: unable to handle kernel NULL pointer dereference at (null) [ 288.103755] IP: [<ffffffff813aee06>] sysrq_handle_crash+0x16/0x20 [ 288.110574] PGD 41ed3a067 PUD 41ef11067 PMD 0 [ 288.115573] Oops: 0002 [#1] SMP [ 288.119191] Modules linked in: nf_conntrack_netbios_ns nf_conntrack_broadcast ipt_MASQUERADE ip6table_nat nf_nat_ipv6 ip6table_mangle ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 iptable_nat nf_nat_ipv4 nf_nat iptable_mangle nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ebtable_filter ebtables ip6table_filter ip6_tables vfat fat acpi_cpufreq mperf coretemp kvm_intel kvm crc32_pclmul crc32c_intel ghash_clmulni_intel iTCO_wdt igb iTCO_vendor_support ptp microcode lpc_ich pps_core mfd_core ioatdma i2c_i801 dca mgag200 i2c_algo_bit drm_kms_helper ttm isci drm libsas i2c_core scsi_transport_sas wmi [ 288.179797] CPU 3 [ 288.181854] Pid: 1443, comm: bash Not tainted 3.9.8-300.fc19.x86_64 #1 Intel Corporation S2600CP/S2600CP [ 288.192633] RIP: 0010:[<ffffffff813aee06>] [<ffffffff813aee06>] sysrq_handle_crash+0x16/0x20 [ 288.202158] RSP: 0018:ffff880420bd5e70 EFLAGS: 00010096 [ 288.208083] RAX: 000000000000000f RBX: ffffffff81c9a100 RCX: ffff88042f66fb90 [ 288.216046] RDX: 0000000000000000 RSI: ffff88042f66df48 RDI: 0000000000000063 [ 288.224007] RBP: ffff880420bd5e70 R08: ffffffff81e97ddc R09: 000000000000084e [ 288.231967] R10: 000000000000084d R11: 0000000000000003 R12: 0000000000000063 [ 288.239927] R13: 0000000000000246 R14: 0000000000000007 R15: 0000000000000000 [ 288.247888] FS: 00007f2458bb7740(0000) GS:ffff88042f660000(0000) knlGS:0000000000000000 [ 288.256917] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 288.263329] CR2: 0000000000000000 CR3: 0000000425752000 CR4: 00000000001407e0 [ 288.271282] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 288.279244] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 288.287205] Process bash (pid: 1443, threadinfo ffff880420bd4000, task ffff880423811770) [ 288.296231] Stack: [ 288.298475] ffff880420bd5ea8 ffffffff813af4c2 0000000000000002 ffff8804246dc900 [ 288.306782] 00007f2458bbe000 0000000000000002 ffff880420bd5f50 ffff880420bd5ec8 [ 288.315091] ffffffff813af93a 00007f2458bbe000 ffff8804258ea600 ffff880420bd5f08 [ 288.323398] Call Trace: [ 288.326135] [<ffffffff813af4c2>] __handle_sysrq+0xa2/0x170 [ 288.332357] [<ffffffff813af93a>] write_sysrq_trigger+0x4a/0x50 [ 288.338968] [<ffffffff811fe809>] proc_reg_write+0x69/0xa0 [ 288.345096] [<ffffffff81199fcf>] vfs_write+0x9f/0x170 [ 288.350831] [<ffffffff8119a2c9>] sys_write+0x49/0xa0 [ 288.356473] [<ffffffff8164efd9>] system_call_fastpath+0x16/0x1b [ 288.363175] Code: e8 20 f8 ff ff eb c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 0f 1f 44 00 00 55 c7 05 04 7f ae 00 01 00 00 00 48 89 e5 0f ae f8 <c6> 04 25 00 00 00 00 01 5d c3 0f 1f 44 00 00 55 31 c0 c7 05 6e [ 288.385035] RIP [<ffffffff813aee06>] sysrq_handle_crash+0x16/0x20 [ 288.391944] RSP <ffff880420bd5e70> [ 288.395836] CR2: 0000000000000000 [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Linux version 3.9.8-300.fc19.x86_64 (mockbuild@bkernel02) (gcc version 4.8.1 20130603 (Red Hat 4.8.1-1) (GCC) ) #1 SMP Thu Jun 27 19:24:23 UTC 2013 [ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-3.9.8-300.fc19.x86_64 root=/dev/mapper/fedora_intel--canoepass--02-root ro rd.md=0 rd.dm=0 rd.lvm.lv=fedora_intel-canoepass-02/root console=ttyS0,115200n81 vconsole.keymap=us rd.lvm.lv=fedora_intel-canoepass-02/swap rd.luks=0 vconsole.font=latarcyrheb-sun16 irqpoll nr_cpus=1 reset_devices cgroup_disable=memory mce=off numa=off udev.children-max=2 rd.memdebug=1 rd.break=cmdline earlyprintk=ttyS0,115200n8 memmap=exactmap memmap=636K@4K memmap=130412K@786432K elfcorehdr=916844K memmap=3076K#3060380K memmap=2048K#3106140K memmap=280K#3110812K memmap=848K#3111092K memmap=4K#3111940K memmap=120K#3111944K memmap=564K#3112064K [ 0.000000] e820: BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: [mem 0x0000000000000100-0x000000000009ffff] usable [ 0.000000] BIOS-e820: [mem 0x00000000000a0000-0x00000000000fffff] reserved [ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x00000000b9f83fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000b9f84000-0x00000000b9f9efff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000b9f9f000-0x00000000ba556fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000ba557000-0x00000000ba558fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000ba559000-0x00000000ba8aefff] usable [ 0.000000] BIOS-e820: [mem 0x00000000ba8af000-0x00000000ba8d6fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000ba8d7000-0x00000000baa7ffff] usable [ 0.000000] BIOS-e820: [mem 0x00000000baa80000-0x00000000baa8ffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000baa90000-0x00000000baaa8fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000baaa9000-0x00000000baadffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000baae0000-0x00000000bab57fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bab58000-0x00000000bab5bfff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bab5c000-0x00000000bab67fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bab68000-0x00000000bab6bfff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bab6c000-0x00000000bab9bfff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bab9c000-0x00000000bababfff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000babac000-0x00000000babb1fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000babb2000-0x00000000babddfff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000babde000-0x00000000bac39fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bac3a000-0x00000000bac40fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bac41000-0x00000000baca6fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000baca7000-0x00000000bafa7fff] ACPI NVS [ 0.000000] BIOS-e820: [mem 0x00000000bafa8000-0x00000000bb04afff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bb04b000-0x00000000bb04efff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bb04f000-0x00000000bb06cfff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bb06d000-0x00000000bb070fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bb071000-0x00000000bb085fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bb086000-0x00000000bb089fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bb08a000-0x00000000bb163fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bb164000-0x00000000bb176fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bb177000-0x00000000bb187fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bb188000-0x00000000bb18bfff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bb18c000-0x00000000bb1f6fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bb1f7000-0x00000000bb1fefff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bb1ff000-0x00000000bd8d5fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bd8d6000-0x00000000bd8d9fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bd8da000-0x00000000bd956fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bd957000-0x00000000bdb56fff] ACPI NVS [ 0.000000] BIOS-e820: [mem 0x00000000bdb57000-0x00000000bdb5bfff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bdb5c000-0x00000000bdb5efff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bdb5f000-0x00000000bdcd5fff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bdcd6000-0x00000000bdde6fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000bdde7000-0x00000000bde2cfff] ACPI NVS [ 0.000000] BIOS-e820: [mem 0x00000000bde2d000-0x00000000bdf00fff] ACPI data [ 0.000000] BIOS-e820: [mem 0x00000000bdf01000-0x00000000bdf01fff] ACPI NVS [ 0.000000] BIOS-e820: [mem 0x00000000bdf02000-0x00000000bdf1ffff] ACPI data [ 0.000000] BIOS-e820: [mem 0x00000000bdf20000-0x00000000bdfacfff] ACPI NVS [ 0.000000] BIOS-e820: [mem 0x00000000bdfad000-0x00000000bdffffff] usable [ 0.000000] BIOS-e820: [mem 0x00000000be000000-0x00000000cfffffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fec00000-0x00000000fec00fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fed19000-0x00000000fed19fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fed1c000-0x00000000fed1ffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fee00000-0x00000000fee00fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000ffc00000-0x00000000ffffffff] reserved [ 0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000083fffffff] usable [ 0.000000] bootconsole [earlyser0] enabled [ 0.000000] e820: last_pfn = 0x840000 max_arch_pfn = 0x400000000 [ 0.000000] NX (Execute Disable) protection: active [ 0.000000] e820: user-defined physical RAM map: [ 0.000000] user: [mem 0x0000000000001000-0x000000000009ffff] usable [ 0.000000] user: [mem 0x0000000030000000-0x0000000037f5afff] usable [ 0.000000] user: [mem 0x00000000baca7000-0x00000000bafa7fff] ACPI data [ 0.000000] user: [mem 0x00000000bd957000-0x00000000bdb56fff] ACPI data [ 0.000000] user: [mem 0x00000000bdde7000-0x00000000bdfacfff] ACPI data [ 0.000000] DMI not present or invalid. [ 0.000000] No AGP bridge found [ 0.000000] e820: last_pfn = 0x37f5b max_arch_pfn = 0x400000000 [ 0.000000] x86 PAT enabled: cpu 0, old 0x7010600070106, new 0x7010600070106 [ 0.000000] x2apic enabled by BIOS, switching to x2apic ops [ 0.000000] found SMP MP-table at [mem 0x000fcaf0-0x000fcaff] mapped at [ffff8800000fcaf0] [ 0.000000] Using GB pages for direct mapping [ 0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff] [ 0.000000] init_memory_mapping: [mem 0x37400000-0x375fffff] [ 0.000000] init_memory_mapping: [mem 0x34000000-0x373fffff] [ 0.000000] init_memory_mapping: [mem 0x30000000-0x33ffffff] [ 0.000000] init_memory_mapping: [mem 0x37600000-0x37f5afff] [ 0.000000] RAMDISK: [mem 0x377ac000-0x37f48fff] [ 0.000000] ACPI BIOS Bug: Error: A valid RSDP was not found (20130117/tbxfroot-218) [ 0.000000] NUMA turned off [ 0.000000] Faking a node at [mem 0x0000000000000000-0x0000000037f5afff] [ 0.000000] Initmem setup node 0 [mem 0x00000000-0x37f5afff] [ 0.000000] NODE_DATA [mem 0x37798000-0x377abfff] [ 0.000000] Zone ranges: [ 0.000000] DMA [mem 0x00001000-0x00ffffff] [ 0.000000] DMA32 [mem 0x01000000-0xffffffff] [ 0.000000] Normal empty [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x00001000-0x0009ffff] [ 0.000000] node 0: [mem 0x30000000-0x37f5afff] [ 0.000000] SFI: Simple Firmware Interface v0.81 http://simplefirmware.org [ 0.000000] Intel MultiProcessor Specification v1.4 [ 0.000000] MPTABLE: OEM ID: INTEL [ 0.000000] MPTABLE: Product ID: ROMLEY [ 0.000000] MPTABLE: APIC at: 0xFEE00000 [ 0.000000] BUG: unable to handle kernel paging request at ffffffffff5f8020 [ 0.000000] IP: [<ffffffff8103c5a3>] native_apic_mem_read+0x3/0x10 [ 0.000000] PGD 36c0f067 PUD 36c11067 PMD 36e4b067 PTE 0 [ 0.000000] Oops: 0000 [#1] SMP [ 0.000000] Modules linked in: [ 0.000000] CPU 0 [ 0.000000] Pid: 0, comm: swapper Not tainted 3.9.8-300.fc19.x86_64 #1 [ 0.000000] RIP: 0010:[<ffffffff8103c5a3>] [<ffffffff8103c5a3>] native_apic_mem_read+0x3/0x10 [ 0.000000] RSP: 0000:ffffffff81c01e38 EFLAGS: 00010046 [ 0.000000] RAX: ffffffff81c20d40 RBX: ffff8800000fcaf0 RCX: 0000000000000025 [ 0.000000] RDX: 00000000000000ca RSI: 0000000000000046 RDI: 0000000000000020 [ 0.000000] RBP: ffffffff81c01e48 R08: 3a454c424154504d R09: 000000000000008b [ 0.000000] R10: 7830203a74612043 R11: 3030303030454546 R12: 0000000000000000 [ 0.000000] R13: 000000000079c9ba R14: 00000000000004d4 R15: ffffffffff475510 [ 0.000000] FS: 0000000000000000(0000) GS:ffffffff81cef000(0000) knlGS:0000000000000000 [ 0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.000000] CR2: ffffffffff5f8020 CR3: 0000000036c0c000 CR4: 00000000000000b0 [ 0.000000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 0.000000] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 0.000000] Process swapper (pid: 0, threadinfo ffffffff81c00000, task ffffffff81c13440) [ 0.000000] Stack: [ 0.000000] ffffffff81c01e48 ffffffff81037116 ffffffff81c01e60 ffffffff81d15bde [ 0.000000] ffff8800000fcaf0 ffffffff81c01ed8 ffffffff81d14e9b ffffffffff475000 [ 0.000000] ffffffff81c01e88 ffffffff8162ecf3 4e49ffff81c01ed8 ff000000004c4554 [ 0.000000] Call Trace: [ 0.000000] [<ffffffff81037116>] ? read_apic_id+0x16/0x30 [ 0.000000] [<ffffffff81d15bde>] register_lapic_address+0x60/0x89 [ 0.000000] [<ffffffff81d14e9b>] default_get_smp_config+0x24b/0x3e9 [ 0.000000] [<ffffffff8162ecf3>] ? sfi_unmap_memory+0x23/0x40 [ 0.000000] [<ffffffff81d0b001>] setup_arch+0xc51/0xd11 [ 0.000000] [<ffffffff8163c832>] ? printk+0x67/0x69 [ 0.000000] [<ffffffff81d04ba6>] start_kernel+0xd4/0x3fe [ 0.000000] [<ffffffff81d04120>] ? early_idt_handlers+0x120/0x120 [ 0.000000] [<ffffffff81d045da>] x86_64_start_reservations+0x2a/0x2c [ 0.000000] [<ffffffff81d046cf>] x86_64_start_kernel+0xf3/0x100 [ 0.000000] Code: 81 f0 0f ab 01 eb 91 90 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 90 55 89 ff 48 89 e5 89 b7 00 80 5f ff 5d c3 66 90 55 89 ff <8b> 87 00 80 5f ff 48 89 e5 5d c3 66 90 55 48 8b 05 d0 a6 7c 00 [ 0.000000] RIP [<ffffffff8103c5a3>] native_apic_mem_read+0x3/0x10 [ 0.000000] RSP <ffffffff81c01e38> [ 0.000000] CR2: ffffffffff5f8020 [ 0.000000] ---[ end trace a7919e7f17c0a725 ]--- [ 0.000000] Kernel panic - not syncing: Attempted to kill the idle task! [ 0.000000] BUG: unable to handle kernel paging request at ffffffffff5f8030 [ 0.000000] IP: [<ffffffff8103c5a3>] native_apic_mem_read+0x3/0x10 [ 0.000000] PGD 36c0f067 PUD 36c11067 PMD 36e4b067 PTE 0 [ 0.000000] Oops: 0000 [#2] SMP [ 0.000000] Modules linked in: [ 0.000000] CPU 0 [ 0.000000] Pid: 0, comm: swapper Tainted: G D 3.9.8-300.fc19.x86_64 #1 [ 0.000000] RIP: 0010:[<ffffffff8103c5a3>] [<ffffffff8103c5a3>] native_apic_mem_read+0x3/0x10 [ 0.000000] RSP: 0000:ffffffff81c01a58 EFLAGS: 00010002 [ 0.000000] RAX: ffffffff81c20d40 RBX: 0000000000000046 RCX: 0000000000000002 [ 0.000000] RDX: 0000000000000002 RSI: 0000000000000001 RDI: 0000000000000030 [ 0.000000] RBP: ffffffff81c01a70 R08: 0000000000000001 R09: 0000000000000002 [ 0.000000] R10: ffffffff81ce2b70 R11: 216b73617420656c R12: 0000000000000000 [ 0.000000] R13: ffffffff81ce2b70 R14: 0000000000000000 R15: ffffffff81c13440 [ 0.000000] FS: 0000000000000000(0000) GS:ffffffff81cef000(0000) knlGS:0000000000000000 [ 0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.000000] CR2: ffffffffff5f8030 CR3: 0000000036c0c000 CR4: 00000000000000b0 [ 0.000000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 0.000000] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 0.000000] Process swapper (pid: 0, threadinfo ffffffff81c00000, task ffffffff81c13440) [ 0.000000] Stack: [ 0.000000] ffffffff81c01a70 ffffffff81037664 0000000000000046 ffffffff81c01a80 [ 0.000000] ffffffff810378f2 ffffffff81c01aa8 ffffffff8103692e ffffffff819e7c78 [ 0.000000] 0000000000000000 0000000000000046 ffffffff81c01b20 ffffffff8163c695 [ 0.000000] Call Trace: [ 0.000000] [<ffffffff81037664>] ? clear_local_APIC+0x34/0x2a0 [ 0.000000] [<ffffffff810378f2>] disable_local_APIC+0x22/0x50 [ 0.000000] [<ffffffff8103692e>] native_stop_other_cpus+0xde/0x160 [ 0.000000] [<ffffffff8163c695>] panic+0xd7/0x1d7 [ 0.000000] [<ffffffff81062c89>] do_exit+0x939/0xa20 [ 0.000000] [<ffffffff8163c832>] ? printk+0x67/0x69 [ 0.000000] [<ffffffff81647ce3>] oops_end+0xa3/0xe0 [ 0.000000] [<ffffffff8163c168>] no_context+0x263/0x270 [ 0.000000] [<ffffffff8163c1e8>] __bad_area_nosemaphore+0x73/0x1cc [ 0.000000] [<ffffffff8163c354>] bad_area_nosemaphore+0x13/0x15 [ 0.000000] [<ffffffff8164a8ae>] __do_page_fault+0x31e/0x510 [ 0.000000] [<ffffffff8105d73c>] ? print_time.part.4+0x6c/0x90 [ 0.000000] [<ffffffff8105d7cf>] ? print_prefix+0x6f/0xb0 [ 0.000000] [<ffffffff8105d8fa>] ? msg_print_text+0xea/0x1d0 [ 0.000000] [<ffffffff8103fb7c>] ? early_serial_write+0x2c/0x60 [ 0.000000] [<ffffffff81646826>] ? _raw_spin_unlock_irqrestore+0x16/0x20 [ 0.000000] [<ffffffff81646826>] ? _raw_spin_unlock_irqrestore+0x16/0x20 [ 0.000000] [<ffffffff8105ea75>] ? wake_up_klogd+0x5/0x50 [ 0.000000] [<ffffffff8164aaae>] do_page_fault+0xe/0x10 [ 0.000000] [<ffffffff81647158>] page_fault+0x28/0x30 [ 0.000000] [<ffffffff8103c5a3>] ? native_apic_mem_read+0x3/0x10 [ 0.000000] [<ffffffff81037116>] ? read_apic_id+0x16/0x30 [ 0.000000] [<ffffffff81d15bde>] register_lapic_address+0x60/0x89 [ 0.000000] [<ffffffff81d14e9b>] default_get_smp_config+0x24b/0x3e9 [ 0.000000] [<ffffffff8162ecf3>] ? sfi_unmap_memory+0x23/0x40 [ 0.000000] [<ffffffff81d0b001>] setup_arch+0xc51/0xd11 [ 0.000000] [<ffffffff8163c832>] ? printk+0x67/0x69 [ 0.000000] [<ffffffff81d04ba6>] start_kernel+0xd4/0x3fe [ 0.000000] [<ffffffff81d04120>] ? early_idt_handlers+0x120/0x120 [ 0.000000] [<ffffffff81d045da>] x86_64_start_reservations+0x2a/0x2c [ 0.000000] [<ffffffff81d046cf>] x86_64_start_kernel+0xf3/0x100 [ 0.000000] Code: 81 f0 0f ab 01 eb 91 90 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 90 55 89 ff 48 89 e5 89 b7 00 80 5f ff 5d c3 66 90 55 89 ff <8b> 87 00 80 5f ff 48 89 e5 5d c3 66 90 55 48 8b 05 d0 a6 7c 00 [ 0.000000] RIP [<ffffffff8103c5a3>] native_apic_mem_read+0x3/0x10 [ 0.000000] RSP <ffffffff81c01a58> [ 0.000000] CR2: ffffffffff5f8030 [ 0.000000] ---[ end trace a7919e7f17c0a726 ]---