Re: [PATCH] mm/page_owner: fix a crash after memory offline

[David Hildenbrand]

On 10.10.19 21:12, Qian Cai wrote:
> On Thu, 2019-10-10 at 20:55 +0200, David Hildenbrand wrote:
> > On 10.10.19 20:32, Qian Cai wrote:
> > > The linux-next series "mm/memory_hotplug: Shrink zones before removing
> > > memory" [1] seems make a crash easier to reproduce while reading
> > > /proc/pagetypeinfo after offlining a memory section. Fix it by using
> > > pfn_to_online_page() in the PFN walker.
> >
> > Can you please rephrase the subject+description to describe the actual
> > problem and drop the reference to the series?
>
> I'd figure it is better for you to post this as you are on the top of this whole
> mess. What do you think?

You mean, I found the key to an unlimited amount of undetected BUGs, so 
I should fix them? ;)

In case you don't have time to explore all the dirty details, I can take 
it from here. Just let me know.

--

Thanks,

David / dhildenb