Re: [PATCH] sparc: Don't leak context bits into thread->fault_address

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On Sun, 31 Jul 2016, David Miller wrote:

> From: Mikulas Patocka <mpatocka@xxxxxxxxxx>
>
> > I've seen a message "BUG: non-zero nr_ptes on freeing mm: 1" twice on 
> > sparc64, once on 4.4.13 and once on 4.4.16. I don't know how to reproduce 
> > it. Do you have an idea what could be causing this bug?
> 
> People have been reporting this off and on for years, and sorry we don't
> know what's causing it yet.

I think it's caused by transparent hugepages. These errors (as well as 
other memory management related crashes) went away when I disabled thp.

Mikulas
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