Re: Crash in MM code in v4.4.y, v4.9.y with TRANSPARENT_HUGEPAGE enabled
From: Andi Kleen
Date: Fri Aug 17 2018 - 22:46:45 EST
> Plus I'd have expected the problem to have been in mainline too, and
> apparently it's just the 4.4 and 4.9 backports.
There's another problem in 4.17, but not 4.18, see
https://bugzilla.redhat.com/show_bug.cgi?id=1618792
Could be the same or different.
-Andi
>
> Your test-case does have mprotect with PROT_NONE. Which together with
> that mask that *might* be PHYSICAL_PMD_PAGE_MASK makes me think it
> might be related.
>
> Linus