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 1BD9517B505; Sun, 30 Aug 2026 00:18:46 +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=1788049128; cv=none; b=m0sdcEaJqhG9swpykR5P4r+4sJmyvIBmoZDFl76lVapiB/GhC3NV+U9fsXIK01JhtKAMcw7603pDa6HKZ+GJ7JJg236AVhslzgnPwz/Yq5w+e0c+MqR6aN6xnbkweaGvDs8fIKVJhnVs1ASvSHNQsLyhYOb8zlng9w/jXg5cuk0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788049128; c=relaxed/simple; bh=6xAAEf9n2ejie2nvZlwnCvtEIsdrlUOQrQyAS7eDFA4=; h=Date:To:From:Subject:Message-Id; b=HCxj2SDOSdwrn7XlxnRJYH/PxuR1T4oyswMbgl5bZRXxwfSkaJMzNz1+2WFYC5kR+MrKeQ1u9pmSt7Zd2BszemwdOJMys3zBARFWwdCOGVjsYv/8w0rwD0c8rBAB0sBfFvQyEiwNcv5lIWSFh3h/71MzF4ZqV+9sXDh2jZz6Gow= 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=A5uR3Mdi; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="A5uR3Mdi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A5D561F000E9; Sun, 30 Aug 2026 00:18:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1788049126; bh=5Ay+6KugRyQ4ifN3giYIgpitSA3B98X9sP/rNUQjWVI=; h=Date:To:From:Subject; b=A5uR3MdiRqRazNNsyulJOgTWRCedDl0aV8IzaXC8OxGYIHZx21jNNV4BLvsmGAL/5 yzzV3Jd0Didj1v1H/tY85wsjp3LHn9b+K7ZDDwrCEwKVTHQPMjxbK6mfuSpqNPRhfT lwwjukdUlFPfnynTOTCLsKdGSfSLXfw8+gv3F+P8= Date: Sat, 29 Aug 2026 17:18:46 -0700 To: mm-commits@vger.kernel.org,ziy@nvidia.com,ying.huang@linux.alibaba.com,vbabka@kernel.org,stable@vger.kernel.org,ryan.roberts@arm.com,rakie.kim@sk.com,matthew.brost@intel.com,ljs@kernel.org,liam@infradead.org,lance.yang@linux.dev,joshua.hahnjy@gmail.com,jannh@google.com,dev.jain@arm.com,david@kernel.org,byungchul@sk.com,baolin.wang@linux.alibaba.com,baohua@kernel.org,balbirs@nvidia.com,apopple@nvidia.com,gourry@gourry.net,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-madvise-skip-zone-device-folios-in-cold-pageout-pmd-range.patch added to mm-new branch Message-Id: <20260830001846.A5D561F000E9@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm/madvise: skip zone device folios in cold/pageout PMD range has been added to the -mm mm-new branch. Its filename is mm-madvise-skip-zone-device-folios-in-cold-pageout-pmd-range.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-madvise-skip-zone-device-folios-in-cold-pageout-pmd-range.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. The mm-new branch of mm.git is not included in linux-next If a few days of testing in mm-new is successful, the patch will me moved into mm.git's mm-unstable branch, which is included in linux-next Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: Gregory Price Subject: mm/madvise: skip zone device folios in cold/pageout PMD range Date: Mon, 17 Aug 2026 18:08:09 -0400 madvise_cold_or_pageout_pte_range() resolves the folio backing a PMD via pmd_folio() and ages or reclaims it without checking for zone device memory. The surrounding guards do not cover every zone device case: - can_madv_lru_vma() excludes VM_PFNMAP and VM_HUGETLB VMAs (so device DAX is filtered) - !pmd_present() branch above rejects device-private and migration entries, which are non-present. - A present zone device PMD - e.g. a device-coherent THP - is not filtered by any of these, nor by pmd_folio() (unlike vm_normal_page_pmd(), it performs no special/pfnmap check), and would be aged or paged out here. Skip ZONE_DEVICE folios explicitly during MADV_COLD/PAGEOUT. Link: https://lore.kernel.org/20260817220810.1175596-3-gourry@gourry.net Fixes: a30b48bf1b24 ("mm/migrate_device: implement THP migration of zone device pages") Signed-off-by: Gregory Price (Meta) Acked-by: David Hildenbrand (Arm) Reviewed-by: Lorenzo Stoakes (ARM) Reviewed-by: Balbir Singh Tested-by: Lance Yang Cc: Alistair Popple Cc: Baolin Wang Cc: Barry Song Cc: Byungchul Park Cc: Dev Jain Cc: "Huang, Ying" Cc: Jann Horn Cc: Joshua Hahn Cc: Liam R. Howlett Cc: Matthew Brost Cc: Rakie Kim Cc: Ryan Roberts Cc: Vlastimil Babka Cc: Zi Yan Cc: Signed-off-by: Andrew Morton --- mm/madvise.c | 3 +++ 1 file changed, 3 insertions(+) --- a/mm/madvise.c~mm-madvise-skip-zone-device-folios-in-cold-pageout-pmd-range +++ a/mm/madvise.c @@ -404,6 +404,9 @@ static int madvise_cold_or_pageout_pte_r folio = pmd_folio(orig_pmd); + if (folio_is_zone_device(folio)) + goto huge_unlock; + /* Do not interfere with other mappings of this folio */ if (folio_maybe_mapped_shared(folio)) goto huge_unlock; _ Patches currently in -mm which might be from gourry@gourry.net are mm-mempolicy-take-a-cpuset-cookie-for-the-interleave-node-count.patch mm-mempolicy-use-srcu-for-the-weighted-interleave-state.patch mm-mempolicy-stop-copying-the-nodemask-in-the-interleave-paths.patch mm-huge_memory-skip-zone-device-folios-in-madvise_free_huge_pmd.patch mm-madvise-skip-zone-device-folios-in-cold-pageout-pmd-range.patch mm-mempolicy-skip-zone-device-folios-when-queueing-folios.patch