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Date:	Mon, 10 Nov 2014 13:39:00 +0800
From:	lkp@...org
To:	Jiang Liu <jiang.liu@...ux.intel.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, lkp@...org,
	Yuanhan Liu <yuanhan.liu@...ux.intel.com>
Subject: [LKP] [x86, irq] BUG: kernel boot hang

FYI, we noticed the below changes on

https://github.com/jiangliu/linux.git irqdomain/p4v1
commit e530b4be849e7c865c95f25008eb52b72ec96341 ("x86, irq: Use cached IOAPIC entry instead of reading from hardware")


+----------------------+------------+------------+
|                      | ff34368973 | e530b4be84 |
+----------------------+------------+------------+
| boot_successes       | 10         | 1          |
| boot_failures        | 0          | 14         |
| BUG:kernel_boot_hang | 0          | 14         |
+----------------------+------------+------------+


[  302.136037] Waiting up to 20 more seconds for network.
[  312.136042] Waiting up to 10 more seconds for network.

BUG: kernel boot hang
Elapsed time: 310
qemu-system-x86_64 -enable-kvm -cpu Westmere -kernel /kernel/x86_64-lkp/dfc6ac916357d686ca861cb0a996ed85413d5d00/vmlinuz-3.18.0-rc3-00128-gdfc6ac9 -append 'user=lkp job=/lkp/scheduled/vm-kbuild-yocto-ia32-31/rand_boot-1-yocto-minimal-i386.cgz-x86_64-lkp-dfc6ac916357d686ca861cb0a996ed85413d5d00-1.yaml ARCH=x86_64 BOOT_IMAGE=/kernel/x86_64-lkp/dfc6ac916357d686ca861cb0a996ed85413d5d00/vmlinuz-3.18.0-rc3-00128-gdfc6ac9 kconfig=x86_64-lkp commit=dfc6ac916357d686ca861cb0a996ed85413d5d00 branch=linux-devel/devel-roam-lkp-201411081809 root=/dev/ram0 max_uptime=3600 RESULT_ROOT=/result/vm-kbuild-yocto-ia32/boot/1/yocto-minimal-i386.cgz/x86_64-lkp/dfc6ac916357d686ca861cb0a996ed85413d5d00/0 ip=::::vm-kbuild-yocto-ia32-31::dhcp earlyprintk=ttyS0,115200 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 drbd.minor_count=8'  -initrd /fs/sdh1/initrd-vm-kbuild-yocto-ia32-31 -m 320 -smp 1 -net nic,vlan=1,model=e1000 -net user,vlan=1 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -drive file=/fs/sdh1/disk0-vm-kbuild-yocto-ia32-31,media=disk,if=virtio -pidfile /dev/shm/kboot/pid-vm-kbuild-yocto-ia32-31 -serial file:/dev/shm/kboot/serial-vm-kbuild-yocto-ia32-31 -daemonize -display none -monitor null 

Thanks,
Fengguang

View attachment ".dmesg" of type "text/plain" (35339 bytes)

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