From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 6F65525A631; Tue, 4 Nov 2025 02:52:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762224748; cv=none; b=Kf70K87BbCgArm+k5AYj9T+kB6cnaqOcxUX8Mz1VvDfxgh3bpsi8LCyW7ybfxuJZelaO85JL6S7HNHN5LBdYTRp1EAD0PVgNdwhzjXEWSEDZ/OT/HvdbWVneh9wELsxreK4wqYDisfVFYCxcXMZE9rz8q9iydyp1ySkRr6lu0ps= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762224748; c=relaxed/simple; bh=Xovpelytaf1rVw6/MGWZziRvb+wid13hMajWjKa65Y8=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=VhwOtx5rm+ql1bYHfJ+8Ri1n5QOBJmgwUOi8zO6w4bgJXqVqw13Ed4Ywjeu4XbuQSX0u6YNgc34h3at3pUJIeajusMYHwedZt6d+eaO1WpIV1BUJxrpWgqPMX1C0OJDsM3cRHcIClwwEc99wPCCuN08Eb8oW4DvodtW94VhCs68= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=q7xTFejP; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="q7xTFejP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CCA1DC4CEFD; Tue, 4 Nov 2025 02:52:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1762224748; bh=Xovpelytaf1rVw6/MGWZziRvb+wid13hMajWjKa65Y8=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=q7xTFejPKd6NhT06RWpXtSixWQbEpsjjKBezm1wVg44aGl0ALe0Oy1XhGDJVqSHHy MAJJ0qgiFXuHTQuaQRCrTT7oBrEjP3r5aNq6iZqPuLddO7lzY8BxtsRizHiiSc4pKe hIbRUTmPyMmu1L6vvb9GyRzw3s52raw3T8RmJaig= Date: Mon, 3 Nov 2025 18:52:26 -0800 From: Andrew Morton To: Michal Hocko Cc: Ankit Agrawal , Aniket Agashe , Vikram Sethi , Jason Gunthorpe , Matt Ochs , Shameer Kolothum , "linmiaohe@huawei.com" , "nao.horiguchi@gmail.com" , "david@redhat.com" , "lorenzo.stoakes@oracle.com" , "Liam.Howlett@oracle.com" , "vbabka@suse.cz" , "rppt@kernel.org" , "surenb@google.com" , "tony.luck@intel.com" , "bp@alien8.de" , "rafael@kernel.org" , "guohanjun@huawei.com" , "mchehab@kernel.org" , "lenb@kernel.org" , "kevin.tian@intel.com" , "alex@shazbot.org" , Neo Jia , Kirti Wankhede , "Tarun Gupta (SW-GPU)" , Zhi Wang , Dheeraj Nigam , Krishnakant Jaju , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "linux-edac@vger.kernel.org" , "Jonathan.Cameron@huawei.com" , "ira.weiny@intel.com" , "Smita.KoralahalliChannabasappa@amd.com" , "u.kleine-koenig@baylibre.com" , "peterz@infradead.org" , "linux-acpi@vger.kernel.org" , "kvm@vger.kernel.org" Subject: Re: [PATCH v4 2/3] mm: handle poisoning of pfn without struct pages Message-Id: <20251103185226.fea151c58ce7077b11b106aa@linux-foundation.org> In-Reply-To: References: <20251026141919.2261-1-ankita@nvidia.com> <20251026141919.2261-3-ankita@nvidia.com> <20251027172620.d764b8e0eab34abd427d7945@linux-foundation.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Mon, 3 Nov 2025 19:22:09 +0100 Michal Hocko wrote: > > Hi Michal, I am trying to replicate what is being done today for non-PFNMAP > > memory failure in __add_to_kill > > (https://github.com/torvalds/linux/blob/master/mm/memory-failure.c#L376). > > For this series, I am inclined to keep it uniform. > > Unless there is a very good reason for this code then I would rather not > rely on an atomic allocation. This just makes the behavior hard to > predict I don't think this was addressed in the v5 series. Yes please, anything we can do to avoid GFP_ATOMIC makes the kernel more reliable.