FYI, we noticed the below changes on

git://git.cmpxchg.org/linux-mmotm.git master
commit 8dbaaff323f0621832a5594d100664584290699b ("mm/slab_common: support the slub_debug boot option on specific object size")


+------------------------------------------+------------+------------+
|                                          | 511d85c267 | 8dbaaff323 |
+------------------------------------------+------------+------------+
| boot_successes                           | 19         | 0          |
| boot_failures                            | 1          | 10         |
| BUG:kernel_boot_crashed                  | 1          |            |
| kernel_BUG_at_mm/slab.c                  | 0          | 10         |
| invalid_opcode                           | 0          | 10         |
| EIP_is_at__kmem_cache_create             | 0          | 10         |
| Kernel_panic-not_syncing:Fatal_exception | 0          | 10         |
| backtrace:create_kmalloc_caches          | 0          | 10         |
| backtrace:kmem_cache_init                | 0          | 10         |
+------------------------------------------+------------+------------+


[    0.000000]       .text : 0x89800000 - 0x89d85d4e   (5655 kB)
[    0.000000] Checking if this processor honours the WP bit even in supervisor mode...Ok.
[    0.000000] ------------[ cut here ]------------
[    0.000000] kernel BUG at mm/slab.c:2276!
[    0.000000] invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC 
[    0.000000] Modules linked in:
[    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.1.0-rc3-mm1-00255-ge55a381 #283
[    0.000000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[    0.000000] task: 8a074b80 ti: 8a06e000 task.ti: 8a06e000
[    0.000000] EIP: 0060:[<898dae2a>] EFLAGS: 00210087 CPU: 0
[    0.000000] EIP is at __kmem_cache_create+0x2cb/0x307
[    0.000000] EAX: 00000000 EBX: 00000002 ECX: 00000000 EDX: 00000000
[    0.000000] ESI: 8009a0e0 EDI: 80002800 EBP: 8a06ff8c ESP: 8a06ff4c
[    0.000000]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[    0.000000] CR0: 8005003b CR2: ffd16000 CR3: 0a2c5000 CR4: 00000690
[    0.000000] Stack:
[    0.000000]  00000000 00001002 00000001 00000800 0009a0e0 0000001f 00000000 00001000
[    0.000000]  00000000 00000000 ffffffe0 00001000 00000020 8009a0e0 000000c0 89f7d56a
[    0.000000]  8a06ffa0 8a108317 8009a0e0 89f7d56a 000000c0 8a06ffbc 8a108372 00002000
[    0.000000] Call Trace:
[    0.000000]  [<8a108317>] create_boot_cache+0x2f/0x4f
[    0.000000]  [<8a108372>] create_kmalloc_cache+0x3b/0x67
[    0.000000]  [<8a1083e3>] create_kmalloc_caches+0x2b/0x51
[    0.000000]  [<8a1098f9>] kmem_cache_init+0xec/0xef
[    0.000000]  [<8a0f18d2>] start_kernel+0x1c0/0x387
[    0.000000]  [<8a0f12b7>] i386_start_kernel+0x85/0x89
[    0.000000] Code: 76 30 89 46 2c 8b 45 ec 89 46 10 e8 fa 8a 15 00 85 ff 89 46 14 89 56 18 79 13 31 d2 89 d8 e8 7d 4c fe ff 83 f8 10 89 46 34 77 02 <0f> 0b 8b 55 d8 89 f0 e8 7c e7 49 00 89 c3 31 c0 85 db 74 20 89
[    0.000000] EIP: [<898dae2a>] __kmem_cache_create+0x2cb/0x307 SS:ESP 0068:8a06ff4c
[    0.000000] ---[ end trace 38833c3a95f5478f ]---
[    0.000000] Kernel panic - not syncing: Fatal exception

Thanks,
Ying Huang