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Wed, 16 Sep 2026 06:45:59 -0700 (PDT) Date: Wed, 16 Sep 2026 15:45:58 +0200 From: Michal Hocko To: "David Hildenbrand (Arm)" Cc: Kyle Meyer , akpm@linux-foundation.org, corbet@lwn.net, linmiaohe@huawei.com, shuah@kernel.org, tony.luck@intel.com, jane.chu@oracle.com, jiaqiyan@google.com, Liam.Howlett@oracle.com, bp@alien8.de, hannes@cmpxchg.org, jack@suse.cz, joel.granados@kernel.org, laoar.shao@gmail.com, lorenzo.stoakes@oracle.com, mclapinski@google.com, nao.horiguchi@gmail.com, osalvador@suse.de, rafael.j.wysocki@intel.com, rppt@kernel.org, russ.anderson@hpe.com, shawn.fan@intel.com, surenb@google.com, vbabka@suse.cz, linux-acpi@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v3] mm/memory-failure: Support disabling soft offline for HugeTLB pages Message-ID: References: <36480c86-fc59-4387-91a4-cad839f502f2@kernel.org> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <36480c86-fc59-4387-91a4-cad839f502f2@kernel.org> On Wed 16-09-26 15:28:01, David Hildenbrand wrote: > On 9/16/26 15:19, Michal Hocko wrote: > > On Wed 16-09-26 15:08:45, David Hildenbrand wrote: > >> > >>> > >>> OK, so apparently there are some BIOSes which abuse this feature to > >>> mimic a real HW poisoning. This doesn't change the overall picture > >>> though > >> > >> Is this really abusing? We know that a page is shaky and will likely go bad in > >> the future, For now it is still accessible. Trying to migrate off that page stop > >> using it right away sounds pretty logical to me. > > > > Yes, no dispute on that. But we have HW poisoning for exactly that > > purpose, no? > > Well, that tells you that the page content is effectively gone and should be > tried to be recovered / migrated away. Unless I am messing up terminology here. Maybe it is me messing up the terminology... But I guess we have established that whether soft offlining is being abused or not, excluding hugetlb through a configuration is just a wrong thing to do. -- Michal Hocko SUSE Labs