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

[Catalin Marinas]

On Fri, Jun 05, 2020 at 06:01:16PM -0700, Andrew Morton wrote:
> 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/).
> 
> Can you confirm that the merge of Mike's 5level_hack zappage has fixed
> the arm64 wontboot?

Yes, it has. Mainline is booting again on arm64.

Thanks.

-- 
Catalin