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 6DC181FF1C7 for ; Sun, 29 Mar 2026 00:39:33 +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=1774744773; cv=none; b=mZlOcwFekUrdAccnx+/8aY+FjMbSuPgT988FFmDBPqjoJ4kyjOsOxTFRnFsnRkEf2bozs2y7ASP7Kczs7t+8cse/xpG8cLacGW0sD/y5u56yj+RpcWhvo1pe4p/Ya03jRjUNkYjERnSmL7MnbNpEl9g4KJiAr0pfrOqnGrCuqnQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774744773; c=relaxed/simple; bh=ycSe/5GY4nUqb2VWdQtL6S1Pl0h7wvMSO2oNsO1Kh00=; h=Date:To:From:Subject:Message-Id; b=GNeCVUNM9W30eE9Esz2yftTCdWBrWLWYaB32MP5C2trvhqPrNyO41jOZFSU0DVCZ7qwL3TWpeOZxG5+8PEMdKU5fLL1smHKWoZkR8qufjlIE1c0CVD9+vKCIYw6y4u0YwlmWer7rK5qCEXjdkoWxy+yEXuxJMeq15k/LSZA5aFc= 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=Oox+kkJp; 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="Oox+kkJp" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F3F40C4CEF7; Sun, 29 Mar 2026 00:39:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1774744773; bh=ycSe/5GY4nUqb2VWdQtL6S1Pl0h7wvMSO2oNsO1Kh00=; h=Date:To:From:Subject:From; b=Oox+kkJp7YJBEzGG+xr8RpRMq9HQlmUa12wQPczIXFjgH0l3XUwVDGc55Q4XM6W57 X0Bv1gzPuNL8eo+7EcSEks8Cu0bekfu5RSPIkIUhIJuiSBMgBGQwMKNAuIeCGHwH0d IxbtOuWUEDvAv2dmz2g6FJXgt4vf1DXgNkqDsLsg= Date: Sat, 28 Mar 2026 17:39:32 -0700 To: mm-commits@vger.kernel.org,zhengqi.arch@bytedance.com,yuanchu@google.com,willy@infradead.org,will@kernel.org,weixugc@google.com,vbabka@suse.cz,surenb@google.com,shakeel.butt@linux.dev,ryan.roberts@arm.com,rppt@kernel.org,riel@surriel.com,mhocko@suse.com,ljs@kernel.org,liam.howlett@oracle.com,jannh@google.com,hannes@cmpxchg.org,dev.jain@arm.com,david@kernel.org,catalin.marinas@arm.com,baohua@kernel.org,axelrasmussen@google.com,apopple@nvidia.com,baolin.wang@linux.alibaba.com,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] mm-rmap-add-a-zone_device-folio-warning-in-folio_referenced.patch removed from -mm tree Message-Id: <20260329003932.F3F40C4CEF7@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: mm: rmap: add a ZONE_DEVICE folio warning in folio_referenced() has been removed from the -mm tree. Its filename was mm-rmap-add-a-zone_device-folio-warning-in-folio_referenced.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Baolin Wang Subject: mm: rmap: add a ZONE_DEVICE folio warning in folio_referenced() Date: Fri, 6 Mar 2026 14:43:39 +0800 The folio_referenced() is used to test whether a folio was referenced during reclaim. Moreover, ZONE_DEVICE folios are controlled by their device driver, have a lifetime tied to that driver, and are never placed on the LRU list. That means we should never try to reclaim ZONE_DEVICE folios, so add a warning to catch this unexpected behavior in folio_referenced() to avoid confusion, as discussed in the previous thread[1]. [1] https://lore.kernel.org/all/16fb7985-ec0f-4b56-91e7-404c5114f899@kernel.org/ Link: https://lkml.kernel.org/r/64d6fb2a33f7101e1d4aca2c9052e0758b76d492.1772778858.git.baolin.wang@linux.alibaba.com Signed-off-by: Baolin Wang Reviewed-by: Alistair Popple Acked-by: David Hildenbrand (Arm) Cc: Axel Rasmussen Cc: Barry Song Cc: Catalin Marinas Cc: Dev Jain Cc: Jann Horn Cc: Johannes Weiner Cc: Liam Howlett Cc: Lorenzo Stoakes (Oracle) Cc: Matthew Wilcox (Oracle) Cc: Michal Hocko Cc: Mike Rapoport Cc: Qi Zheng Cc: Rik van Riel Cc: Ryan Roberts Cc: Shakeel Butt Cc: Suren Baghdasaryan Cc: Vlastimil Babka Cc: Wei Xu Cc: Will Deacon Cc: Yuanchu Xie Signed-off-by: Andrew Morton --- mm/rmap.c | 1 + 1 file changed, 1 insertion(+) --- a/mm/rmap.c~mm-rmap-add-a-zone_device-folio-warning-in-folio_referenced +++ a/mm/rmap.c @@ -1072,6 +1072,7 @@ int folio_referenced(struct folio *folio .invalid_vma = invalid_folio_referenced_vma, }; + VM_WARN_ON_ONCE_FOLIO(folio_is_zone_device(folio), folio); *vm_flags = 0; if (!pra.mapcount) return 0; _ Patches currently in -mm which might be from baolin.wang@linux.alibaba.com are mm-filemap-fix-nr_pages-calculation-overflow-in-filemap_map_pages.patch mm-vmscan-fix-dirty-folios-throttling-on-cgroup-v1-for-mglru.patch