normal boot vs kexec, ubuntu 14.04

foo.diff

--- dmesg.normal	2016-07-07 16:05:21.096379507 -0700
+++ dmesg.kexec	2016-07-07 16:05:21.096379507 -0700
@@ -2,13 +2,13 @@
 Initializing cgroup subsys cpu
 Initializing cgroup subsys cpuacct
 Linux version 3.13.0-35-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #62-Ubuntu SMP Fri Aug 15 01:58:42 UTC 2014 (Ubuntu 3.13.0-35.62-generic 3.13.11.6)
-Command line: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic root=UUID=f7e9595f-d61e-49fc-975a-50e96194f1ce ro crashkernel=384M-:128M crashkernel=384M-:128M
+Command line: root=UUID=f7e9595f-d61e-49fc-975a-50e96194f1ce ro crashkernel=384M-:128M crashkernel=384M-:128M
 KERNEL supported cpus:
   Intel GenuineIntel
   AMD AuthenticAMD
   Centaur CentaurHauls
 e820: BIOS-provided physical RAM map:
-BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
+BIOS-e820: [mem 0x0000000000000100-0x000000000009fbff] usable
 BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
 BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
 BIOS-e820: [mem 0x0000000000100000-0x000000001fffdfff] usable
@@ -30,7 +30,7 @@
   C0000-FFFFF write-protect
 MTRR variable ranges enabled:
   0 base 0080000000 mask FF80000000 uncachable
-  1 disabled
+  1 base 00FC000000 mask FFFE000000 write-combining
   2 disabled
   3 disabled
   4 disabled
@@ -43,20 +43,21 @@
 Base memory trampoline at [ffff880000099000] 99000 size 24576
 init_memory_mapping: [mem 0x00000000-0x000fffff]
  [mem 0x00000000-0x000fffff] page 4k
-BRK [0x01fdf000, 0x01fdffff] PGTABLE
-BRK [0x01fe0000, 0x01fe0fff] PGTABLE
-BRK [0x01fe1000, 0x01fe1fff] PGTABLE
-init_memory_mapping: [mem 0x1fc00000-0x1fdfffff]
- [mem 0x1fc00000-0x1fdfffff] page 2M
-init_memory_mapping: [mem 0x1c000000-0x1fbfffff]
- [mem 0x1c000000-0x1fbfffff] page 2M
+BRK [0x1efdf000, 0x1efdffff] PGTABLE
+BRK [0x1efe0000, 0x1efe0fff] PGTABLE
+BRK [0x1efe1000, 0x1efe1fff] PGTABLE
+init_memory_mapping: [mem 0x1fa00000-0x1fbfffff]
+ [mem 0x1fa00000-0x1fbfffff] page 2M
+init_memory_mapping: [mem 0x1c000000-0x1f9fffff]
+ [mem 0x1c000000-0x1f9fffff] page 2M
 init_memory_mapping: [mem 0x00100000-0x1bffffff]
  [mem 0x00100000-0x001fffff] page 4k
  [mem 0x00200000-0x1bffffff] page 2M
-init_memory_mapping: [mem 0x1fe00000-0x1fffdfff]
+init_memory_mapping: [mem 0x1fc00000-0x1fffdfff]
+ [mem 0x1fc00000-0x1fdfffff] page 2M
  [mem 0x1fe00000-0x1fffdfff] page 4k
-BRK [0x01fe2000, 0x01fe2fff] PGTABLE
-RAMDISK: [mem 0x1f333000-0x1f596fff]
+BRK [0x1efe2000, 0x1efe2fff] PGTABLE
+RAMDISK: [mem 0x1fd8a000-0x1ffedfff]
 ACPI: RSDP 00000000000f0f80 000014 (v00 BOCHS )
 ACPI: RSDT 000000001fffe410 000034 (v01 BOCHS  BXPCRSDT 00000001 BXPC 00000001)
 ACPI: FACP 000000001fffff80 000074 (v01 BOCHS  BXPCFACP 00000001 BXPC 00000001)
@@ -70,10 +71,10 @@
 Faking a node at [mem 0x0000000000000000-0x000000001fffdfff]
 Initmem setup node 0 [mem 0x00000000-0x1fffdfff]
   NODE_DATA [mem 0x1fff9000-0x1fffdfff]
-Reserving 128MB of memory at 368MB for crashkernel (System RAM: 511MB)
+Reserving 128MB of memory at 352MB for crashkernel (System RAM: 511MB)
 kvm-clock: Using msrs 4b564d01 and 4b564d00
 kvm-clock: cpu 0, msr 0:1fff5001, boot clock
- [ffffea0000000000-ffffea00007fffff] PMD -> [ffff880016800000-ffff880016ffffff] on node 0
+ [ffffea0000000000-ffffea00007fffff] PMD -> [ffff880015800000-ffff880015ffffff] on node 0
 Zone ranges:
   DMA      [mem 0x00001000-0x00ffffff]
   DMA32    [mem 0x01000000-0xffffffff]
@@ -116,21 +117,21 @@
 e820: [mem 0x20000000-0xfeffbfff] available for PCI devices
 Booting paravirtualized kernel on KVM
 setup_percpu: NR_CPUS:256 nr_cpumask_bits:256 nr_cpu_ids:2 nr_node_ids:1
-PERCPU: Embedded 29 pages/cpu @ffff88001fc00000 s86336 r8192 d24256 u1048576
+PERCPU: Embedded 29 pages/cpu @ffff88001fa00000 s86336 r8192 d24256 u1048576
 pcpu-alloc: s86336 r8192 d24256 u1048576 alloc=1*2097152
 pcpu-alloc: [0] 0 1 
 kvm-clock: cpu 0, msr 0:1fff5001, primary cpu clock
 KVM setup async PF for cpu 0
-kvm-stealtime: cpu 0, msr 1fc0dfc0
+kvm-stealtime: cpu 0, msr 1fa0dfc0
 Built 1 zonelists in Node order, mobility grouping on.  Total pages: 128903
 Policy zone: DMA32
-Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic root=UUID=f7e9595f-d61e-49fc-975a-50e96194f1ce ro crashkernel=384M-:128M crashkernel=384M-:128M
+Kernel command line: root=UUID=f7e9595f-d61e-49fc-975a-50e96194f1ce ro crashkernel=384M-:128M crashkernel=384M-:128M
 PID hash table entries: 2048 (order: 2, 16384 bytes)
 Checking aperture...
 No AGP bridge found
 Calgary: detecting Calgary via BIOS EBDA area
 Calgary: Unable to locate Rio Grande table in EBDA - bailing!
-Memory: 365312K/523888K available (7372K kernel code, 1144K rwdata, 3404K rodata, 1336K init, 1440K bss, 158576K reserved)
+Memory: 365320K/523888K available (7372K kernel code, 1144K rwdata, 3404K rodata, 1336K init, 1440K bss, 158568K reserved)
 SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
 Hierarchical RCU implementation.
 	RCU dyntick-idle grace-period acceleration is enabled.
@@ -176,8 +177,8 @@
 .... node  #0, CPUs:      #1
 x86: Booted up 1 node, 2 CPUs
 KVM setup async PF for cpu 1
+kvm-stealtime: cpu 1, msr 1fb0dfc0
 smpboot: Total of 2 processors activated (13644.50 BogoMIPS)
-kvm-stealtime: cpu 1, msr 1fd0dfc0
 devtmpfs: initialized
 EVM: security.selinux
 EVM: security.SMACK64
@@ -185,7 +186,7 @@
 EVM: security.capability
 pinctrl core: initialized pinctrl subsystem
 regulator-dummy: no parameters
-RTC time: 22:46:24, date: 07/07/16
+RTC time: 22:51:51, date: 07/07/16
 NET: Registered protocol family 16
 cpuidle: using governor ladder
 cpuidle: using governor menu
@@ -274,8 +275,8 @@
 pci 0000:00:07.0: [1af4:1002] type 00 class 0x00ff00
 pci 0000:00:07.0: reg 0x10: [io  0xc0c0-0xc0df]
 ACPI: PCI Interrupt Link [LNKA] (IRQs 5 *10 11)
-ACPI: PCI Interrupt Link [LNKB] (IRQs 5 *10 11)
-ACPI: PCI Interrupt Link [LNKC] (IRQs 5 10 *11)
+ACPI: PCI Interrupt Link [LNKB] (IRQs 5 10 *11)
+ACPI: PCI Interrupt Link [LNKC] (IRQs 5 *10 11)
 ACPI: PCI Interrupt Link [LNKD] (IRQs 5 10 *11)
 ACPI: PCI Interrupt Link [LNKS] (IRQs *9)
 ACPI: Enabled 16 GPEs in block 00 to 0F
@@ -327,20 +328,19 @@
 UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
 NET: Registered protocol family 1
 pci 0000:00:00.0: Limiting direct PCI/PCI transfers
-pci 0000:00:01.0: PIIX3: Enabling Passive Release
 pci 0000:00:01.0: Activating ISA DMA hang workarounds
 ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 11
 pci 0000:00:02.0: Boot video device
 PCI: CLS 0 bytes, default 64
 Trying to unpack rootfs image as initramfs...
-Freeing initrd memory: 2448K (ffff88001f333000 - ffff88001f597000)
+Freeing initrd memory: 2448K (ffff88001fd8a000 - ffff88001ffee000)
 microcode: CPU0 sig=0x623, pf=0x0, revision=0x1
 microcode: CPU1 sig=0x623, pf=0x0, revision=0x1
 microcode: Microcode Update Driver: v2.00 <tigran@aivazian.fsnet.co.uk>, Peter Oruba
 Scanning for low memory corruption every 60 seconds
 Initialise system trusted keyring
 audit: initializing netlink socket (disabled)
-type=2000 audit(1467931584.783:1): initialized
+type=2000 audit(1467931911.696:1): initialized
 HugeTLB registered 2 MB page size, pre-allocated 0 pages
 zbud: loaded
 VFS: Disk quotas dquot_6.5.2
@@ -356,13 +356,6 @@
 io scheduler cfq registered
 pci_hotplug: PCI Hot Plug PCI Core version: 0.5
 pciehp: PCI Express Hot Plug Controller Driver version: 0.4
-efifb: probing for efifb
-efifb: framebuffer at 0xfc000000, mapped to 0xffffc90000100000, using 1408k, total 1408k
-efifb: mode is 800x600x24, linelength=2400, pages=1
-efifb: scrolling: redraw
-efifb: Truecolor: size=0:8:8:8, shift=0:16:8:0
-Console: switching to colour frame buffer device 100x37
-fb0: EFI VGA frame buffer device
 intel_idle: does not run on family 6 model 2
 ipmi message handler version 39.2
 input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
@@ -440,50 +433,38 @@
 AppArmor: AppArmor sha1 policy hashing enabled
 IMA: No TPM chip found, activating TPM-bypass!
 regulator-dummy: disabling
-  Magic number: 8:103:805
-rtc_cmos 00:00: setting system clock to 2016-07-07 22:46:24 UTC (1467931584)
+  Magic number: 8:206:906
+rtc_cmos 00:00: setting system clock to 2016-07-07 22:51:51 UTC (1467931911)
 BIOS EDD facility v0.16 2004-Jun-25, 0 devices found
 EDD information not available.
 PM: Hibernation image not present or could not be loaded.
 Freeing unused kernel memory: 1336K (ffffffff81d1f000 - ffffffff81e6d000)
 Write protecting the kernel read-only data: 12288k
-Freeing unused kernel memory: 808K (ffff880001736000 - ffff880001800000)
-Freeing unused kernel memory: 692K (ffff880001b53000 - ffff880001c00000)
+Freeing unused kernel memory: 808K (ffff88001e736000 - ffff88001e800000)
+Freeing unused kernel memory: 692K (ffff88001eb53000 - ffff88001ec00000)
 systemd-udevd[101]: starting version 204
 EXT4-fs (vda2): INFO: recovery required on readonly filesystem
 EXT4-fs (vda2): write access will be enabled during recovery
-EXT4-fs (vda2): orphan cleanup on readonly fs
-EXT4-fs (vda2): 16 orphan inodes deleted
 EXT4-fs (vda2): recovery complete
 EXT4-fs (vda2): mounted filesystem with ordered data mode. Opts: (null)
-random: init urandom read with 13 bits of entropy available
-init: plymouth-upstart-bridge main process (152) terminated with status 1
+random: init urandom read with 10 bits of entropy available
+init: plymouth-upstart-bridge main process (151) terminated with status 1
 init: plymouth-upstart-bridge main process ended, respawning
-init: plymouth-upstart-bridge main process (163) terminated with status 1
+init: plymouth-upstart-bridge main process (161) terminated with status 1
 init: plymouth-upstart-bridge main process ended, respawning
 init: plymouth-upstart-bridge main process (165) terminated with status 1
 init: plymouth-upstart-bridge main process ended, respawning
-init: plymouth-upstart-bridge main process (167) terminated with status 1
-init: plymouth-upstart-bridge main process ended, respawning
-init: plymouth-upstart-bridge main process (170) terminated with status 1
-init: plymouth-upstart-bridge main process ended, respawning
-init: plymouth-upstart-bridge main process (174) terminated with status 1
-init: plymouth-upstart-bridge main process ended, respawning
-tsc: Refined TSC clocksource calibration: 3411.071 MHz
 Adding 498684k swap on /dev/vda1.  Priority:-1 extents:1 across:498684k FS
 EXT4-fs (vda2): re-mounted. Opts: errors=remount-ro
 IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
 IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
 IPv6: ADDRCONF(NETDEV_UP): eth2: link is not ready
-systemd-udevd[300]: starting version 204
+systemd-udevd[306]: starting version 204
 lp: driver loaded but no devices found
 piix4_smbus 0000:00:01.3: SMBus Host Controller at 0xb100, revision 0
-[drm] Initialized drm 1.1.0 20060810
 FDC 0 is a S82078B
-checking generic (fc000000 160000) vs hw (fc000000 2000000)
-fb: conflicting fb hw usage cirrusdrmfb vs EFI VGA - removing generic driver
-Console: switching to colour dummy device 80x25
-[TTM] Zone  kernel: Available graphics memory: 185314 kiB
+[drm] Initialized drm 1.1.0 20060810
+[TTM] Zone  kernel: Available graphics memory: 185318 kiB
 [TTM] Initializing pool allocator
 [TTM] Initializing DMA pool allocator
 [drm] fb mappable at 0x0
@@ -496,12 +477,13 @@
 cirrus 0000:00:02.0: fb0: cirrusdrmfb frame buffer device
 cirrus 0000:00:02.0: registered panic notifier
 [drm] Initialized cirrus 1.0.0 20110418 for 0000:00:02.0 on minor 0
-init: Failed to obtain startpar-bridge instance: Unknown parameter: INSTANCE
-init: failsafe main process (803) killed by TERM signal
+init: udev-fallback-graphics main process (556) terminated with status 1
+tsc: Refined TSC clocksource calibration: 3411.066 MHz
 8021q: 802.1Q VLAN Support v1.8
 8021q: adding VLAN 0 to HW filter on device eth0
 8021q: adding VLAN 0 to HW filter on device eth1
 8021q: adding VLAN 0 to HW filter on device eth2
+init: Failed to obtain startpar-bridge instance: Unknown parameter: INSTANCE
+init: failsafe main process (833) killed by TERM signal
 input: ImExPS/2 Generic Explorer Mouse as /devices/platform/i8042/serio1/input/input3
 init: plymouth-upstart-bridge main process ended, respawning
-random: nonblocking pool is initialized