Description

QFX5200 may end up in a boot loop or may stuck in boot because of kernel panic.
This KB explains the way to resolve this issue

Symptoms

Below error is seen during boot :-


Kernel panic - not syncing: Attempted to kill init! exitcode=0x00007f00

CPU: 6 PID: 1 Comm: init Tainted: G O 3.14.52-rt50-WR7.0.0.9_ovp #1
Hardware name: Juniper Networks 0C4F/Type2 - Board Product Name1, BIOS V0018.6U 10/30/2013
ffff88042adcfed8 ffff88042adcfe48 ffffffff818e5940 ffffffff81ca2150
ffff88042adcfec8 ffffffff818e3bcd ffffffff00000010 ffff88042adcfed8
ffff88042adcfe70 000000000000000b 0000000000007f00 ffff88042adca4d0
Call Trace:
[<ffffffff818e5940>] dump_stack+0x4d/0x66
[<ffffffff818e3bcd>] panic+0xc0/0x1bf
[<ffffffff810527fe>] do_exit+0xb9e/0xba0
[<ffffffff8105fe42>] ? __set_task_blocked+0x32/0x80
[<ffffffff81052883>] do_group_exit+0x43/0xd0
[<ffffffff81052924>] SyS_exit_group+0x14/0x20
[<ffffffff818ecf66>] system_call_fastpath+0x1a/0x1f
Kernel Offset: 0x0 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffff9fffffff)
------------[ cut here ]------------
WARNING: CPU: 6 PID: 1 at /b/dc-builder/yocto-x86/JUNOS_222_R3_S3_BRANCH/JUNOS_222_R3_S3_BRANCH-x86-64-ovp-WRL7-qfx-5e-200/build-qfx-5e-ovp-secure/x86-64-ovp/bitbake_build/tmp/work-shared/intel-x86-64/kernel-source/arch/x86/kernel/smp.c:124 native_smp_send_reschedule+0x61/0x70()
Modules linked in: re_lpc_fpga_drv(O) bios_drv(O) iTCO_wdt gpio_ich iTCO_vendor_support i2c_i801 lpc_ich ie31200_edac edac_core fan igb(O)
CPU: 6 PID: 1 Comm: init Tainted: G O 3.14.52-rt50-WR7.0.0.9_ovp #1
Hardware name: Juniper Networks 0C4F/Type2 - Board Product Name1, BIOS V0018.6U 10/30/2013
0000000000000009 ffff88043fd83db8 ffffffff818e5940 0000000000000000
ffff88043fd83df0 ffffffff8104f5cd 0000000000000000 ffff88043fc11c40
0000000000000006 ffff88042adca010 7fffffffffffffff ffff88043fd83e00
Call Trace:
<IRQ> [<ffffffff818e5940>] dump_stack+0x4d/0x66
[<ffffffff8104f5cd>] warn_slowpath_common+0x7d/0xa0
[<ffffffff8104f6aa>] warn_slowpath_null+0x1a/0x20
[<ffffffff81033411>] native_smp_send_reschedule+0x61/0x70
[<ffffffff8108e881>] trigger_load_balance+0x151/0x220
[<ffffffff81082473>] scheduler_tick+0xa3/0xe0
[<ffffffff8105e1b7>] update_process_times+0x27/0x50
[<ffffffff810bf686>] tick_sched_handle.isra.15+0x36/0x50
[<ffffffff810bf6e4>] tick_sched_timer+0x44/0x70
[<ffffffff81076609>] __run_hrtimer+0x89/0x240
[<ffffffff810bf6a0>] ? tick_sched_handle.isra.15+0x50/0x50
[<ffffffff810772cf>] hrtimer_interrupt+0xff/0x250
[<ffffffff81035bca>] local_apic_timer_interrupt+0x3a/0x60
[<ffffffff818ef3ef>] smp_apic_timer_interrupt+0x3f/0x50
[<ffffffff818eddea>] apic_timer_interrupt+0x6a/0x70
<EOI> [<ffffffff81099a62>] ? up+0x32/0x50
[<ffffffff818e3c93>] ? panic+0x186/0x1bf
[<ffffffff818e3c02>] ? panic+0xf5/0x1bf
[<ffffffff810527fe>] do_exit+0xb9e/0xba0
[<ffffffff8105fe42>] ? __set_task_blocked+0x32/0x80
[<ffffffff81052883>] do_group_exit+0x43/0xd0
[<ffffffff81052924>] SyS_exit_group+0x14/0x20
[<ffffffff818ecf66>] system_call_fastpath+0

Solution

As per error logs kernel is unable to sync. Please perform format install on the device using below KB :-

https://supportportal.juniper.net/s/article/EX-QFX-Procedure-to-format-install-QFX5K-device-using-a-USB

If the issue is not resolved even after format install or format install can not be performed then please contact JTAC for further support

Modification History

2024-09-16 : Article Created