FYI, we noticed the following commit:

commit: b7ef62aa8a7aebb156ce093e3215fb821426fc1b ("mm, page_alloc: split smallest stolen page in fallback")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

in testcase: boot

on test machine: qemu-system-x86_64 -enable-kvm -m 512M

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+------------------------------------------------------------------+------------+------------+
|                                                                  | f7b7744467 | b7ef62aa8a |
+------------------------------------------------------------------+------------+------------+
| boot_successes                                                   | 0          | 0          |
| boot_failures                                                    | 4          | 4          |
| invoked_oom-killer:gfp_mask=0x                                   | 4          |            |
| Mem-Info                                                         | 4          |            |
| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes | 4          |            |
| BUG:kernel_hang_in_boot_stage                                    | 0          | 4          |
+------------------------------------------------------------------+------------+------------+



[    2.398650] BTRFS: selftest: Running find delalloc tests
[    2.413373] tsc: Refined TSC clocksource calibration: 2260.994 MHz
[    2.414891] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x209745a29ae, max_idle_ns: 440795217760 ns

Elapsed time: 460
BUG: kernel hang in boot stage

initrds=(
	/osimage/yocto/yocto-minimal-x86_64-2016-04-22.cgz
	/lkp/scheduled/vm-lkp-nex04-yocto-x86_64-11/boot-1-yocto-minimal-x86_64-2016-04-22.cgz-b7ef62aa8a7aebb156ce093e3215fb821426fc1b-20170321-127060-hr3r1t-0.cgz
	/lkp/lkp/lkp-x86_64.cgz


To reproduce:

        git clone https://github.com/01org/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script  # job-script is attached in this email



Thanks,
Xiaolong