Re: [PATCH] mm: free HIGHATOMIC and CMA frozen pages via buddy

[Andrew Morton]

On Mon, 25 May 2026 15:10:33 +0800 "zhaoyang.huang" <zhaoyang.huang@xxxxxxxxxx> wrote:

> Pages in pageblocks above MIGRATE_PCPTYPES were remapped to
> MIGRATE_MOVABLE on the per-CPU lists, so order-9 GFP_ATOMIC
> allocations could consume CMA physical blocks which may lead to
> cma_alloc failed.
> This commit would like to free them through free_one_page() simply.

Can you please describe the userspace-visible effects of this change? 
Before and after.  And include this description within the patch
changelog.

AI review claims to have found a couple of issues, one of which sounds
serious:
	https://sashiko.dev/#/patchset/20260525071033.1104929-1-zhaoyang.huang@xxxxxxxxxx

Thanks.