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Date: Fri, 5 Jun 2026 11:07:26 +0100
From: Lorenzo Stoakes <ljs@kernel.org>
To: Dev Jain <dev.jain@arm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, 
	David Hildenbrand <david@kernel.org>, Zi Yan <ziy@nvidia.com>, 
	Baolin Wang <baolin.wang@linux.alibaba.com>, "Liam R . Howlett" <liam@infradead.org>, 
	Nico Pache <npache@redhat.com>, Ryan Roberts <ryan.roberts@arm.com>, 
	Barry Song <baohua@kernel.org>, Lance Yang <lance.yang@linux.dev>, SeongJae Park <sj@kernel.org>, 
	Balbir Singh <balbirs@nvidia.com>, linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH mm-hotfixes] mm/huge_memory: use correct flags for device
 private PMD entry
Message-ID: <aiKficIP-akvSQAf@lucifer>
References: <20260601083044.57132-1-ljs@kernel.org>
 <73762983-d48d-486f-ad5f-78015e6f95ee@arm.com>
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In-Reply-To: <73762983-d48d-486f-ad5f-78015e6f95ee@arm.com>

By the way,

I think maybe the reason you didn't hit this in your work on the spurious
warning stuff for hmm-tests is that I also had to set CONFIG_DEVICE_PRIVATE
(as well as CONFIG_TEST_HMM) to get this to trigger.

I think the reason others maybe didn't see it is because the self tests
will just skip the hmm tests if CONFIG_TEST_HMM is not set.

Cheers, Lorenzo