FYI, we noticed the following commit:

commit: cc4a913fa513cdac8777c2714e6388465691faf8 ("mm/memblock: switch to use NUMA_NO_NODE instead of MAX_NUMNODES in for_each_mem_pfn_range()")
url: https://github.com/0day-ci/linux/commits/Wei-Yang/mm-memblock-use-NUMA_NO_NODE-instead-of-MAX_NUMNODES-as-default-node_id/20170127-100339


in testcase: trinity
with following parameters:

	runtime: 300s

test-description: Trinity is a linux system call fuzz tester.
test-url: http://codemonkey.org.uk/projects/trinity/


on test machine: qemu-system-i386 -enable-kvm -m 256M

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


+------------------------------------------------+------------+------------+
|                                                | 2d1ec173d5 | cc4a913fa5 |
+------------------------------------------------+------------+------------+
| boot_successes                                 | 6          | 0          |
| boot_failures                                  | 0          | 8          |
| WARNING:at_mm/memblock.c:#__next_mem_pfn_range | 0          | 8          |
| calltrace:SyS_open                             | 0          | 8          |
+------------------------------------------------+------------+------------+



[    0.000000] initial memory mapped: [mem 0x00000000-0x083fffff]
[    0.000000] Base memory trampoline at [8009b000] 9b000 size 16384
[    0.000000] ------------[ cut here ]------------
[    0.000000] WARNING: CPU: 0 PID: 0 at mm/memblock.c:1088 __next_mem_pfn_range+0x5e/0x16e
[    0.000000] Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead
[    0.000000] Modules linked in:
[    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.9.0-rc6-00135-gcc4a913 #1
[    0.000000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[    0.000000]  87511ec0 86e241ad 8743bde0 8743bde0 87511ed8 86c48c2a 00000440 11a426ae
[    0.000000]  87511f5c 87511f54 87511ef4 86c48c68 00000009 00000000 87511eec 8743bde0
[    0.000000]  87511f08 87511f1c 875eadb9 8743bd80 00000440 8743bde0 87511f5c 87511f54
[    0.000000] Call Trace:
[    0.000000]  [<86e241ad>] dump_stack+0x76/0xa9
[    0.000000]  [<86c48c2a>] __warn+0xba/0xd0
[    0.000000]  [<86c48c68>] warn_slowpath_fmt+0x28/0x30
[    0.000000]  [<875eadb9>] __next_mem_pfn_range+0x5e/0x16e
[    0.000000]  [<875a84e6>] init_range_memory_mapping+0x3e/0x177
[    0.000000]  [<875e9fea>] ? memblock_find_in_range+0x3c/0x95
[    0.000000]  [<875a87c4>] init_mem_mapping+0x1a5/0x260
[    0.000000]  [<87594e3a>] setup_arch+0x7c0/0xb82
[    0.000000]  [<86c973b2>] ? vprintk_default+0x12/0x20
[    0.000000]  [<8758dcd8>] start_kernel+0x5b/0x40f
[    0.000000]  [<8758d2c8>] i386_start_kernel+0xaf/0xc7
[    0.000000] ---[ end trace 0000000000000000 ]---
[    0.000000] BRK [0x07ea3000, 0x07ea3fff] PGTABLE
[    0.000000] RAMDISK: [mem 0x0f4f1000-0x0ffcffff]


To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script  # job-script is attached in this email



Thanks,
Xiaolong