[PATCH] mm/huge_memory: restrict __GFP_ZEROTAGS to HW tagging architectures

[Andrew Morton]

On Mon, 24 Nov 2025 11:57:09 +0100 "David Hildenbrand (Red Hat)" <david at kernel.org> wrote:

> > I've run into the issue where due to init being set to false if zero_tags was set,
> > the system does not clear the zero_folio. I just spent a lot of time debugging it :)
> > 
> > Catalin, were you going to send out this patch as a fix to be included in mm-unstable?
> > I've for now reverted your __GFP_ZEROTAGS change to get_huge_zero_folio() for my testing
> > 
> > I am on the current mm-new branch.
> 
> We have a fix upstream now:
> 
> commit 5bebe8de19264946d398ead4e6c20c229454a552
> Author: Linus Torvalds <torvalds at linux-foundation.org>
> Date:   Tue Nov 18 08:21:27 2025 -0800
> 
>      mm/huge_memory: Fix initialization of huge zero folio
> 
> 
> Andrew could consider picking it up as well temporarily to fix the issue 
> until we rebase on top of the new kernel.

Sure, I added 5bebe8de19264946d398ead4e6c20c229454a552 to mm-new as a
temp thing.