Re: compaction: VM_BUG_ON_PAGE(!zone_spans_pfn(page_zone(page), pfn))

[Qian Cai]

> On Apr 26, 2020, at 10:41 AM, Mike Rapoport <rppt@xxxxxxxxxxxxx> wrote:
> 
> Hi,
> 
> On Thu, Apr 23, 2020 at 05:25:56PM -0400, Qian Cai wrote:
>> Compaction starts to crash below on linux-next today. The faulty page belongs to Node 0 DMA32 zone.
>> Iâll continue to narrow it down, but just want to give a headup in case someone could beat me to it.
>> 
>> Debug output from free_area_init_core()
>> [    0.000000] KK start page = ffffea0000000040, end page = ffffea0000040000, nid = 0 DMA
>> [    0.000000] KK start page = ffffea0000040000, end page = ffffea0004000000, nid = 0 DMA32
>> [    0.000000] KK start page = ffffea0004000000, end page = ffffea0012000000, nid = 0 NORMAL
>> [    0.000000] KK start page = ffffea0012000000, end page = ffffea0021fc0000, nid = 4 NORMAL
>> 
>> I donât understand how it could end up in such a situation. There are several recent patches look
>> more related than some others.
> 
> Can you please add "mminit_loglevel=4 memblock=debug" to the kernel
> command line?

https://cailca.github.io/files/dmesg.txt