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Date: Mon, 25 May 2026 13:15:01 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: "zhaoyang.huang" <zhaoyang.huang@unisoc.com>
Cc: Vlastimil Babka <vbabka@kernel.org>, Johannes Weiner
 <hannes@cmpxchg.org>, Michal Hocko <mhocko@kernel.org>, Suren Baghdasaryan
 <surenb@google.com>, Brendan Jackman <jackmanb@google.com>, Zi Yan
 <ziy@nvidia.com>, <linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>,
 Zhaoyang Huang <huangzhaoyang@gmail.com>, <steve.kang@unisoc.com>
Subject: Re: [PATCH] mm: free HIGHATOMIC and CMA frozen pages via buddy
Message-Id: <20260525131501.f232fd3cfb67442d2c284631@linux-foundation.org>
In-Reply-To: <20260525071033.1104929-1-zhaoyang.huang@unisoc.com>
References: <20260525071033.1104929-1-zhaoyang.huang@unisoc.com>
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On Mon, 25 May 2026 15:10:33 +0800 "zhaoyang.huang" <zhaoyang.huang@unisoc.com> 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@unisoc.com

Thanks.