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 090703BD638 for ; Wed, 5 Aug 2026 02:23:11 +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=1785896592; cv=none; b=E9dmWhpqKDl9m/BpuKyurduKSLXDrO3TrHQ0lbUwgNt20bD/apqVwdPAr3pUiQurkfs2P97fBOE9rKEZOvqzK2ZgnJ/Y1Yc8rPztfis+LwpBBPBi0ydu9Ry95JdIiOdaesUK0YaoiPhN5sx7DAQ0aZxce/4vosvpRFFLG1zn73o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785896592; c=relaxed/simple; bh=s/JP58bmoTyEDX79G3vEX1qDo1L0YF1VJA+0LdCni60=; h=Date:To:From:Subject:Message-Id; b=jtezVtrcd9lgSVjqjw1tkhUBtPyKTjsG/gWIkm0pSuGLJyn6IJ4AYk6kw3s2E228oHi298HMXXmpUqUgjMC14zdcB5nP4gXiZ/mXHn+szn7BbKx9eAowCHnNNulk3gsOGx36h/PA55ydgW+Wkc+bThufhSStfZ5hWqIbEPJUF7I= 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=NKk8iXj5; 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="NKk8iXj5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CA17B1F000E9; Wed, 5 Aug 2026 02:23:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1785896590; bh=ocsONunwlr9T/a1rEMfDZtPc35cxHATDz5cHJ6Z6b/8=; h=Date:To:From:Subject; b=NKk8iXj5XJeiuZmkeCQXNE1kyYE5TUqYLJZDW2Rs4fhmNj97Nix6U45n6k4X5ZkBT zarlHJ0RxgN9h5ft1AAxq4FfEUWxx1oWhbVW8hwHNSydhoikDKfq2ElXixCq7UU0Ra FjW6M2r2PC3zds1ZQqI6iyDNvfyYtRLrciDeqBYM= Date: Tue, 04 Aug 2026 19:23:10 -0700 To: mm-commits@vger.kernel.org,vbabka@kernel.org,tj@kernel.org,surenb@google.com,ryan.roberts@arm.com,rppt@kernel.org,npache@redhat.com,mhocko@suse.com,ljs@kernel.org,liam@infradead.org,lance.yang@linux.dev,jackmanb@google.com,hannes@cmpxchg.org,dev.jain@arm.com,dennis@kernel.org,david@kernel.org,brendan.jackman@linux.dev,baolin.wang@linux.alibaba.com,baohua@kernel.org,apopple@nvidia.com,ziy@nvidia.com,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] mm-huge_memory-add-page-private-check-back-in-__split_folio_to_order.patch removed from -mm tree Message-Id: <20260805022310.CA17B1F000E9@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/huge_memory: add page->private check back in __split_folio_to_order() has been removed from the -mm tree. Its filename was mm-huge_memory-add-page-private-check-back-in-__split_folio_to_order.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: Zi Yan Subject: mm/huge_memory: add page->private check back in __split_folio_to_order() Date: Thu, 09 Jul 2026 14:06:03 -0400 page->private should not be set in tail pages. Commit 4265d67e405a ("mm/migrate_device: add THP splitting during migration") removed a DEBUG_VM check without a proper reason[1]. Add it back. Link: https://lore.kernel.org/all/13f3fcda-7328-4aa5-afc6-75a294a82b2a@nvidia.com/ [1] Link: https://lore.kernel.org/20260709-keep-subpage-private-zero-at-free-v3-3-7e4fe155f5b9@nvidia.com Signed-off-by: Zi Yan Reviewed-by: Lance Yang Acked-by: David Hildenbrand (Arm) Reviewed-by: Baolin Wang Reviewed-by: Vlastimil Babka (SUSE) Cc: Alistair Popple Cc: Barry Song Cc: Brendan Jackman Cc: Brendan Jackman Cc: Dennis Zhou Cc: Dev Jain Cc: Johannes Weiner Cc: Liam R. Howlett Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Mike Rapoport Cc: Nico Pache Cc: Ryan Roberts Cc: Suren Baghdasaryan Cc: Tejun Heo Signed-off-by: Andrew Morton --- mm/huge_memory.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/mm/huge_memory.c~mm-huge_memory-add-page-private-check-back-in-__split_folio_to_order +++ a/mm/huge_memory.c @@ -3591,6 +3591,13 @@ static void __split_folio_to_order(struc new_folio->mapping = folio->mapping; new_folio->index = folio->index + i; + /* + * page->private should not be set in tail pages. Warn once + * if private is unexpectedly set. Do it before swap.val assignment + * since private overlaps with swap.val. + */ + VM_WARN_ON_ONCE_PAGE(new_folio->private, new_head); + if (folio_test_swapcache(folio)) new_folio->swap.val = folio->swap.val + i; _ Patches currently in -mm which might be from ziy@nvidia.com are mm-huge_memory-use-folios-memcg-inside-__folio_split.patch xarray-honor-xa_flags_account-in-xas_split_alloc.patch