mm: VM_BUG on boot in set_pfnblock_flags_mask

[Sasha Levin]

Hi all,

I've decided to try and put more effort into testing on physical machines, but couldn't
even get the box to boot :(

[    0.000000] page:ffffea0000040000 count:0 mapcount:1 mapping:          (null) index:0x0
[    0.000000] flags: 0x0()
[    0.000000] page dumped because: VM_BUG_ON_PAGE(!zone_spans_pfn(zone, pfn))
PANIC: early exception 06 rip 10:ffffffff8135d20f error 0 cr2 ffff88407ffff000
[    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.1.0-rc1-next-20150501+ #1
[    0.000000] Hardware name: Oracle Corporation OVCA X3-2             /ASSY,MOTHERBOARD,1U   , BIOS 17021300 06/19/2012
[    0.000000]  0000000000000000 115170652258be86 ffffffff82e077c0 ffffffff8267b3f8
[    0.000000]  0000000000000007 0000000000001000 ffffffff82e078b8 ffffffff831a11b0
[    0.000000]  29296e6670202c65 6e6f7a286e66705f 0000000000000000 6e6f7a2128454741
[    0.000000] Call Trace:
[    0.000000] dump_stack (lib/dump_stack.c:52)
[    0.000000] early_idt_handler (arch/x86/kernel/head_64.S:393)
[    0.000000] set_pageblock_migratetype (mm/page_alloc.c:317)
[    0.000000] memmap_init_zone (include/linux/mm.h:858 include/linux/mm.h:871 mm/page_alloc.c:862 mm/page_alloc.c:4553)
[    0.000000] free_area_init_node (mm/page_alloc.c:5300 mm/page_alloc.c:5374)
[    0.000000] free_area_init_nodes (mm/page_alloc.c:5765)
[    0.000000] zone_sizes_init (arch/x86/mm/init.c:716)
[    0.000000] paging_init (arch/x86/mm/init_64.c:665)
[    0.000000] setup_arch (arch/x86/kernel/setup.c:1183)
[    0.000000] start_kernel (include/linux/bitmap.h:187 include/linux/cpumask.h:342 include/linux/mm_types.h:476 init/main.c:524)
[    0.000000] x86_64_start_reservations (arch/x86/kernel/head64.c:198)
[    0.000000] x86_64_start_kernel (arch/x86/kernel/head64.c:187)


Thanks,
Sasha
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