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Tue, 18 Aug 2026 03:26:33 +0000 X-Migadu-Flow: FLOW_OUT Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3864.600.51.1.1\)) Subject: Re: [PATCH 1/1] mm/hugetlb: do not dissolve gigantic pages without runtime support From: Muchun Song In-Reply-To: <20260817162039.1511838-1-xialonglong2025@163.com> Date: Tue, 18 Aug 2026 11:26:19 +0800 Cc: osalvador@suse.de, akpm@linux-foundation.org, david@kernel.org, mike.kravetz@oracle.com, mhocko@suse.com, linmiaohe@huawei.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Longlong Xia Content-Transfer-Encoding: quoted-printable Message-Id: References: <20260817162039.1511838-1-xialonglong2025@163.com> To: Longlong Xia X-Mailer: Apple Mail (2.3864.600.51.1.1) X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: A0E6A40005 X-Stat-Signature: wjx6nziyedgsdmuj7gfzajn7goddfqxa X-Rspam-User: X-HE-Tag: 1787023605-463740 X-HE-Meta: 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 NYXLHSnx ah5/oz3RQJehDRDtqCWgbY0sXCm5gJvdqWHy+O29ozcjoKBB/zVgpLMOIjgFF5MXH+zdlt3FUm0pIsNHh5BNxFKc5ADpOdrzMngWCX9FY13fA3kAsOylT1el5QDzQdT7h1doUhuC4ZVjvhHga9JJK1dGtEODkyywLLHU/PJSgLJpXbJsAaJzvdDj/IlGdJtd4JCxTMK2xBQRHHJsWRjD3Jlo3j6oPRaVmrIL77Kd8NIq/ClzmB3UTIIsS/xnktjR6pltYycJmW7a9JRwI02Nv54c9kwNKAiHn708rqCvnfYxdwKgWYf7tA6r/bJ5VjR+tjXvLosbkEq8K+I7Z5IFE//xMcQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > On Aug 18, 2026, at 00:20, Longlong Xia = wrote: >=20 > From: Longlong Xia >=20 > dissolve_free_hugetlb_folio() doesn't check = hstate_is_gigantic_no_runtime(h) > though remove_hugetlb_folio()/update_and_free_hugetlb_folio() silently > bail for such folios, so it frees a still-listed folio and, on vmemmap > restore failure, the add_hugetlb_folio() rollback corrupts the free > list. >=20 > Link: = https://sashiko.dev/#/patchset/20260814083027.1419487-1-xialonglong2025@16= 3.com > Fixes: 6eb4e88a6d27 ("hugetlb: create remove_hugetlb_page() to = separate functionality") > Assisted-by: Codex:gpt-5.6-sol > Signed-off-by: Longlong Xia Reviewed-by: Muchun Song Thanks.