Re: [PATCH RFC v2 14/27] arm64: mte: Disable dynamic tag storage management if HW KASAN is enabled

[David Hildenbrand]

On 27.11.23 16:07, Alexandru Elisei wrote:
> Hi,
>
> On Fri, Nov 24, 2023 at 08:54:12PM +0100, David Hildenbrand wrote:
> > On 19.11.23 17:57, Alexandru Elisei wrote:
> > > To be able to reserve the tag storage associated with a page requires that
> > > the tag storage page can be migrated.
> > >
> > > When HW KASAN is enabled, the kernel allocates pages, which are now tagged,
> > > in non-preemptible contexts, which can make reserving the associate tag
> > > storage impossible.
> >
> > I assume that it's the only in-kernel user that actually requires tagged
> > memory (besides for user space), correct?
>
> Indeed, this is the case. I'll expand the commit message to be more clear about
> it.

Great, thanks!

--
Cheers,

David / dhildenb