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

David Hildenbrand
2023-11-24T19:54:50Z

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?

--
Cheers,

David / dhildenb