linux-kernel - [x86, irq] BUG: kernel boot hang

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Date:	Thu, 13 Nov 2014 21:41:39 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Jiang Liu <jiang.liu@...ux.intel.com>
Cc:	LKP <lkp@...org>, linux-kernel@...r.kernel.org,
	Yuanhan Liu <yuanhan.liu@...el.com>
Subject: [x86, irq] BUG: kernel boot hang


Hi Jiang,

This is another bisect result.

https://github.com/jiangliu/linux.git irqdomain/p4v2
commit b8c2d075135a41f69254a75c4f26162559503ab4 ("x86, irq: Use cached IOAPIC entry instead of reading from hardware")


+----------------------+------------+------------+
|                      | 384c30d19a | b8c2d07513 |
+----------------------+------------+------------+
| boot_successes       | 20         | 5          |
| early-boot-hang      | 1          |            |
| boot_failures        | 0          | 15         |
| BUG:kernel_boot_hang | 0          | 15         |
+----------------------+------------+------------+


[  289.616037] Waiting up to 30 more seconds for network.
[  299.616037] Waiting up to 20 more seconds for network.

BUG: kernel boot hang
Elapsed time: 310
qemu-system-x86_64 -enable-kvm -kernel /kernel/x86_64-lkp/349d0daa5e14b9b402a2dea3e602ef1cb109173b/vmlinuz-3.18.0-rc3-g349d0da -append 'user=lkp job=/lkp/scheduled/vm-vp-quantal-x86_64-27/rand_boot-1-quantal-core-x86_64.cgz-x86_64-lkp-349d0daa5e14b9b402a2dea3e602ef1cb109173b-1.yaml ARCH=x86_64 BOOT_IMAGE=/kernel/x86_64-lkp/349d0daa5e14b9b402a2dea3e602ef1cb109173b/vmlinuz-3.18.0-rc3-g349d0da kconfig=x86_64-lkp commit=349d0daa5e14b9b402a2dea3e602ef1cb109173b branch=jiangliu/irqdomain/p4v2 root=/dev/ram0 max_uptime=3600 RESULT_ROOT=/result/vm-vp-quantal-x86_64/boot/1/quantal-core-x86_64.cgz/x86_64-lkp/349d0daa5e14b9b402a2dea3e602ef1cb109173b/0 ip=::::vm-vp-quantal-x86_64-27::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/sdf1/initrd-vm-vp-quantal-x86_64-27 -m 360 -smp 2 -net nic,vlan=1,model=e1000 -net user,vlan=1 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -pidfile /dev/shm/kboot/pid-vm-vp-quantal-x86_64-27 -serial file:/dev/shm/kboot/serial-vm-vp-quantal-x86_64-27 -daemonize -display none -monitor null 



Thanks,
Fengguang

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