From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 582C9FD374E for ; Wed, 25 Feb 2026 13:57:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=euXigfeu1Ls+Mvlqr/jfLJrufgIc8aH5ZNnJ/mmFges=; b=IebJw4BjKasyRM7cVjtOrM0F/0 eA/UkEjc3JcAi8M+T8NrGokFx3o8Gz2J0J+kFuJjHh5aZJdWJkX/A+nghtea2yiU3F7H3KIjXl4Od O9Qd7uXORd36x4F/SkzPgBte3+gp2W+GbaNAtqfxCIMIbnGTjX1BF/308/OPCPD2d76z9jz3OuXmA DekXUt7g+0ACyIYyAE3Lm3Mven1E2f2uUbybHQWSP+n/YGzH/E/GDKYWUz++J+ulD4Erp38sNxMnR vPXmmd5+w6Ke9AzJjJlH6oERQe9dEbYnag8M/r3mhP3FR/00QcuSsCMoP7zxwpQ1xTBzf0SbtPmA0 tM5aqGAQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vvFOI-000000049Ok-0775; Wed, 25 Feb 2026 13:57:26 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vvFOH-000000049O8-1rqb for linux-arm-kernel@lists.infradead.org; Wed, 25 Feb 2026 13:57:25 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id CAFE16012B; Wed, 25 Feb 2026 13:57:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4AD8CC116D0; Wed, 25 Feb 2026 13:57:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772027844; bh=OUurYv35bNhXesuuVWjFpAi6I65QdGPN0j4kp3KPEIs=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=I92pcnP/2w/38kBmgcDkuu+UDMvqA+rUZOm3NlbmqSs/M2THpW0kgPllrMeteQshm vOfYwOs6vei328598cOpaenhGoAYoIXD8nqV3ivJKUH8XAGotGZwQ7E8Z0JAMtXwgK D4xDk1e+5hc9dMVj+LDpW/dmGs9gFZYy5974BopbOmYeeSGU2+JN7Sw45oAvy3uVKa JPaQR+IhNJIM34CCmd1FDef2ElMhcfCqoXmwPSLgxT2yWhQK9+phbCg0ro0Wucn9HE pBg9j6ZoA5ndt9PZGt40XNny4FR0erxKyQ9Zb5gdcR8sE2EAbZB5tjLfsw+1I1avWS sXSvM8ohkeL9A== Message-ID: <258cad5e-9ad2-4dfa-a090-c65bbe3fc7ff@kernel.org> Date: Wed, 25 Feb 2026 14:57:16 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/5] mm: rmap: add a ZONE_DEVICE folio warning in folio_referenced() To: Baolin Wang , Rik van Riel , akpm@linux-foundation.org Cc: catalin.marinas@arm.com, will@kernel.org, lorenzo.stoakes@oracle.com, ryan.roberts@arm.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, harry.yoo@oracle.com, jannh@google.com, willy@infradead.org, baohua@kernel.org, dev.jain@arm.com, axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com, hannes@cmpxchg.org, zhengqi.arch@bytedance.com, shakeel.butt@linux.dev, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.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: 8bit X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 2/24/26 06:49, Baolin Wang wrote: > > > On 2/24/26 10:38 AM, Rik van Riel wrote: >> On Tue, 2026-02-24 at 09:56 +0800, Baolin Wang wrote: >>> >>> diff --git a/mm/rmap.c b/mm/rmap.c >>> index bff8f222004e..be785dfc9336 100644 >>> --- a/mm/rmap.c >>> +++ b/mm/rmap.c >>> @@ -1065,6 +1065,7 @@ int folio_referenced(struct folio *folio, int >>> is_locked, >>>           .invalid_vma = invalid_folio_referenced_vma, >>>       }; >>>   +    VM_WARN_ON_FOLIO(folio_is_zone_device(folio), folio); >>>       *vm_flags = 0; >>>       if (!pra.mapcount) >>>           return 0; >> >> Should be a VM_WARN_ON_ONCE_FOLIO so we do not cause >> a softlockup if we try to print information about a >> million ZONE_DEVICE pages? > > Yes, sounds reasonable. Will do in next version. Thanks for reviewing. Feel free to add my Acked-by: David Hildenbrand (Arm) to that. -- Cheers, David