[PATCH] arm64: Track no early_pgtable_alloc() for kmemleak

[Qian Cai]

On 11/4/21 1:06 PM, Mike Rapoport wrote:
> I think I'll be better to rename MEMBLOCK_ALLOC_KASAN to, say,
> MEMBLOCK_ALLOC_NOKMEMLEAK and use that for both KASAN and page table cases.

Okay, that would look a bit nicer.

> But more generally, we are going to hit this again and again.
> Couldn't we add a memblock allocation as a mean to get more memory to
> kmemleak::mem_pool_alloc()?

For the last 5 years, this is the second time I am ware of this kind of
issue just because of the 64KB->4KB switch on those servers, although I
agree it could happen again in the future due to some new debugging
features etc. I don't feel a strong need to rewrite it now though. Not
sure if Catalin saw things differently. Anyway, Mike, do you agree that
we could rewrite that separately in the future?