From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0D41E4F4730; Wed, 16 Sep 2026 13:08:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789564135; cv=none; b=Lc4ZG5aMbdcz32bh3NHtCUaCoeTKgcTZVyQiYXtDI+y1RWGfO1LpSINFfXEkI5ef3Byrmo7xxIDrXi2XsmrQmW/J9tr9oCpFDDHqg8z29P0u1XaXWDpa7bDenTJrY8hF6OHjpIH8PremrdTeOG7mNA0GSKqDAQPDP77a7rBcsJk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789564135; c=relaxed/simple; bh=OLcJdj7KSU+qAs2aXbulktmzQrneMknG4IxIVipcf6I=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=jeRWN5BOsRNouCVntlCc8sQvDvpJH5gwxmBHJe5LXqGACAm+Q5Wp7vqaZVZJanVp9zMfz+nAd/4x89skkSmvMVjYc66hlR1OgZ5V2+iZG7whnKSh3uQgMhY6fTZ0ikiTn5AXy+IGifQvtJOXLyF6B12unTnk9b1aB3QOCxYf92U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Gr6/24qa; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Gr6/24qa" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B58041F000FF; Wed, 16 Sep 2026 13:08:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789564133; bh=B4HuTK4jePJtH8LBf+QEidf509ABsOfiRp9Jj0ByiJA=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=Gr6/24qanQtWXcVV0Zm473sUWdftheBN8Dl6S2dota+JDIBegvD/U6oepXZtL0zbG 5gR5/rAGlAwe5BfF4pSvarTVpMTl1dTPor4Q0tRwz45laIq1a8ZunG55FpWdvrHwYG 1ef5CdHmOW7oE6g9Hs0EPHK+K0i/mb0ecUgC3D9re1Kw9X1s/yIc+5KWjhTIvGcgXx BuPm307qwWX0eGUnbe7prJ5l4McvA9c9raYOAOEqbixvqOfV8eLMBudNkmLsTVMXNg mTWgc2YB5Bh13UiNbjRlEh/KPlMbqI03KM9t8Wt+aXexc0waO4BjOJyrEcX+GXGDAM F2euRBinNH1wQ== Message-ID: Date: Wed, 16 Sep 2026 15:08:45 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3] mm/memory-failure: Support disabling soft offline for HugeTLB pages To: Michal Hocko , Kyle Meyer Cc: 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 References: From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit > > 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. Now, the weird thing is that for hugetlb we wants a different behavior (keep using the page and ignore the request to evacuate). > >> If you think this should be handled differently, I'm open to suggestions. > > Yes, do not treat hugetlb pages any special. In case there is a HW > related problem which decides to offline portion of the hugetlb page > then bad for you. It wouldn't be too much different if this was handled > through a real HW poisoning. I agree with that. -- Cheers, David