Re: kernel BUG at mm/swap_state.c:170!

[Huang\, Ying]

Mikhail Gavrilov <mikhail.v.gavrilov@xxxxxxxxx> writes:

> On Mon, 22 Jul 2019 at 12:53, Huang, Ying <ying.huang@xxxxxxxxx> wrote:
>>
>> Yes.  This is quite complex.  Is the transparent huge page enabled in
>> your system?  You can check the output of
>>
>> $ cat /sys/kernel/mm/transparent_hugepage/enabled
>
> always [madvise] never
>
>> And, whether is the swap device you use a SSD or NVMe disk (not HDD)?
>
> NVMe INTEL Optane 905P SSDPE21D480GAM3

Thanks!  I have found another (easier way) to reproduce the panic.
Could you try the below patch on top of v5.2-rc2?  It can fix the panic
for me.

Best Regards,
Huang, Ying

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