[PATCH v6] arm64: Enable vmalloc-huge with ptdump

[Will Deacon]

On Mon, 22 Sep 2025 12:11:26 +0530, Dev Jain wrote:
> Our goal is to move towards enabling vmalloc-huge by default on arm64 so
> as to reduce TLB pressure. Therefore, we need a way to analyze the portion
> of block mappings in vmalloc space we can get on a production system; this
> can be done through ptdump, but currently we disable vmalloc-huge if
> CONFIG_PTDUMP_DEBUGFS is on. The reason is that lazy freeing of kernel
> pagetables via vmap_try_huge_pxd() may race with ptdump, so ptdump
> may dereference a bogus address.
> 
> [...]

Applied to arm64 (for-next/mm), thanks!

[1/1] arm64: Enable vmalloc-huge with ptdump
      https://git.kernel.org/arm64/c/fa93b45fd397

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev