Re: [PATCH v1] mm: Fix access of uninitialized memmaps in fs/proc/page.c

[David Hildenbrand]

On 09.10.19 15:29, Michal Hocko wrote:
> On Wed 09-10-19 15:24:05, David Hildenbrand wrote:
>> On 09.10.19 15:22, Michal Hocko wrote:
>>> On Wed 09-10-19 14:58:24, David Hildenbrand wrote:
>>> [...]
>>>> I would be fine with this, but it means that - for now - the three
>>>> /proc/ files won't be able to deal with ZONE_DEVICE memory.
>>>
>>> Thanks for the clarification. Is this an actual problem though? Do we
>>> have any consumers of the functionality?
>>>
>>
>> I don't know, that's why I was being careful in not changing its behavior.
> 
> Can we simply go with pfn_to_online_page. I would be quite surprised if
> anybody was really examining zone device memory ranges as they are
> static IIUC. If there is some usecase I am pretty sure we will learn
> that and can address it accordingly.
> 

I consider it mostly a debug interface either way. Will rework, test and
resend. Thanks!

-- 

Thanks,

David / dhildenb