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Date:	Wed, 11 Nov 2015 13:25:16 +0800
From:	kernel test robot <ying.huang@...ux.intel.com>
TO:	Krzysztof Mazur <krzysiek@...lesie.net>
CC:	Thomas Gleixner <tglx@...utronix.de>
Subject: [lkp] [x86/setup] 68accac392: Fixed kernel boot crash

FYI, we noticed the below changes on

https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/urgent
commit 68accac392d859d24adcf1be3a90e41f978bd54c ("x86/setup: Fix low identity map for >= 2GB kernel range")


+------------------------------------------------+------------+------------+
|                                                | f4e342c877 | 68accac392 |
+------------------------------------------------+------------+------------+
| boot_successes                                 | 2          | 8          |
| boot_failures                                  | 8          | 2          |
| BUG:kernel_boot_crashed                        | 8          |            |
| IP-Config:Auto-configuration_of_network_failed | 0          | 2          |
+------------------------------------------------+------------+------------+

The patch fixed the kernel boot crash as follow

[    0.039999] ..... delta 6250002
[    0.039999] ..... mult: 268435568
[    0.039999] ..... calibration result: 3333334
[    0.039999] ..... CPU clock speed is 2693.2574 MHz.
[    0.039999] ..... host bus clock speed is 1000.0334 MHz.
[    0.040072] smpboot: CPU0: GenuineIntel QEMU Virtual CPU version 2.4.0 (family: 0x6, model: 0x6, stepping: 0x3)
[    0.042199] Performance Events: no PMU driver, software events only.
[    0.070059] CPU 1 irqstacks, hard=40066000 soft=40068000
[    0.070762] x86: Booting SMP configuration:
[    0.071278] .... node  #0, CPUs:      #1
Elapsed time: 10
BUG: kernel boot crashed
qemu-system-i386 -enable-kvm -kernel /pkg/linux/i386-randconfig-c0-11110048/gcc-5/f4e342c87776884f0309942a3880ca7e835239f9/vmlinuz-4.3.0-01111-gf4e342c -append 'root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-kbuild-yocto-i386-48/rand_boot-1-yocto-minimal-i386.cgz-i386-randconfig-c0-11110048-f4e342c87776884f0309942a3880ca7e835239f9-20151111-123907-kzyhml-0.yaml ARCH=i386 kconfig=i386-randconfig-c0-11110048 branch=linux-devel/devel-spot-201511102354 commit=f4e342c87776884f0309942a3880ca7e835239f9 BOOT_IMAGE=/pkg/linux/i386-randconfig-c0-11110048/gcc-5/f4e342c87776884f0309942a3880ca7e835239f9/vmlinuz-4.3.0-01111-gf4e342c max_uptime=600 RESULT_ROOT=/result/boot/1/vm-kbuild-yocto-i386/yocto-minimal-i386.cgz/i386-randconfig-c0-11110048/gcc-5/f4e342c87776884f0309942a3880ca7e835239f9/0 LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw ip=::::vm-kbuild-yocto-i386-48::dhcp drbd.minor_count=8'  -initrd /fs/sdf1/initrd-vm-kbuild-yocto-i386-48 -m 320 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -drive file=/fs/sdf1/disk0-vm-kbuild-yocto-i386-48,media=disk,if=virtio -pidfile /dev/shm/kboot/pid-vm-kbuild-yocto-i386-48 -serial file:/dev/shm/kboot/serial-vm-kbuild-yocto-i386-48 -daemonize -display none -monitor null 

Thanks,
Ying Huang

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