Re: [PATCH] mm/pagewalk: fix race between concurrent split and refault

[David Hildenbrand (Arm)]

>>>
>>> Yikes, really? :) This is from 2017, I'm a little surprised we didn't hit
>>> this bug until now.
>>>
>>> Has something changed more recently that made it more likely to hit? Or is
>>> it one of those 'needed people to have more RAM first' or bigger PCI BAR's?
>>
>> Yeah, frankly, this is the first patch where I could find the splitting being introduced. It might
>> be more correct to refer to the introduction of 1G huge_pfnmaps?
> 
> Yeah maybe that makes more sense? David - what do you think?

I'm not sure whether DAX with PUDs could trigger something similar?

-- 
Cheers,

David