Re: [PATCH v3 1/7] mm: Add functions to track page directory modifications

[Andrew Morton]

On Fri, 5 Jun 2020 12:46:55 +0100 Catalin Marinas <catalin.marinas@xxxxxxx> wrote:

> On Fri, Jun 05, 2020 at 11:08:13AM +0100, Catalin Marinas wrote:
> > This patch causes a kernel panic on arm64 (and possibly powerpc, I
> > haven't tried). arm64 still uses the 5level-fixup.h and pud_alloc()
> > checks for the empty p4d with pgd_none() instead of p4d_none().
> 
> Ah, should have checked the list first
> (https://lore.kernel.org/linux-mm/20200604074446.23944-1-joro@xxxxxxxxxx/).
> 

Sorry about that.

Can you confirm that the merge of Mike's 5level_hack zappage has fixed
the arm64 wontboot?