From: "Lorenzo Stoakes (ARM)" <ljs@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@kernel.org>,
"Liam R. Howlett" <liam@infradead.org>,
Vlastimil Babka <vbabka@kernel.org>,
Mike Rapoport <rppt@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>, Jann Horn <jannh@google.com>,
Pedro Falcato <pfalcato@suse.de>,
"Matthew Wilcox (Oracle)" <willy@infradead.org>,
Jan Kara <jack@suse.cz>, Miaohe Lin <linmiaohe@huawei.com>,
Naoya Horiguchi <nao.horiguchi@gmail.com>,
Rik van Riel <riel@surriel.com>, Harry Yoo <harry@kernel.org>,
Lance Yang <lance.yang@linux.dev>, Kees Cook <kees@kernel.org>,
Zi Yan <ziy@nvidia.com>,
Baolin Wang <baolin.wang@linux.alibaba.com>,
Nico Pache <npache@redhat.com>,
Ryan Roberts <ryan.roberts@arm.com>, Dev Jain <dev.jain@arm.com>,
Barry Song <baohua@kernel.org>,
Usama Arif <usama.arif@linux.dev>,
Matthew Brost <matthew.brost@intel.com>,
Joshua Hahn <joshua.hahnjy@gmail.com>,
Rakie Kim <rakie.kim@sk.com>, Byungchul Park <byungchul@sk.com>,
Gregory Price <gourry@gourry.net>,
Ying Huang <ying.huang@linux.alibaba.com>,
Alistair Popple <apopple@nvidia.com>,
Peter Xu <peterx@redhat.com>, Xu Xin <xu.xin16@zte.com.cn>,
Chengming Zhou <chengming.zhou@linux.dev>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: Re: [PATCH 07/15] mm/rmap: track whether the page VMA mapped walk is anonymous
Date: Sat, 18 Jul 2026 15:51:02 +0100 [thread overview]
Message-ID: <aluQgZAL_fOL7hik@lucifer> (raw)
In-Reply-To: <20260717-b4-scalable-cow-virt-pgoff-v1-7-cf24910ef094@kernel.org>
On Fri, Jul 17, 2026 at 07:19:45PM +0100, Lorenzo Stoakes (ARM) wrote:
<snip>
> diff --git a/mm/rmap.c b/mm/rmap.c
> index 5798427d007f..cfd4195ff1ae 100644
> --- a/mm/rmap.c
> +++ b/mm/rmap.c
> @@ -1240,8 +1240,10 @@ static bool mapping_wrprotect_range_one(struct folio *folio,
> .vma = vma,
> .address = address,
> .flags = PVMW_SYNC,
> + .is_anon_walk = false,
> };
>
> + VM_WARN_ON_ONCE(folio_test_anon(folio));
Andrew - can you drop this line please? It's incorrect (folio is always NULL here).
Thanks!
Cheers, Lorenzo
next prev parent reply other threads:[~2026-07-18 14:51 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-17 18:19 [PATCH 00/15] mm/rmap: index MAP_PRIVATE file-backed folios by virt pgoff Lorenzo Stoakes (ARM)
2026-07-17 18:19 ` [PATCH 01/15] mm/vma: introduce VMA virtual page offset field and add helpers Lorenzo Stoakes (ARM)
2026-07-17 18:19 ` [PATCH 02/15] mm: introduce linear_virt_page_index() Lorenzo Stoakes (ARM)
2026-07-17 18:19 ` [PATCH 03/15] mm: abstract vma_address() and introduce vma_anon_address() Lorenzo Stoakes (ARM)
2026-07-17 18:19 ` [PATCH 04/15] mm: update print_bad_page_map() to show virtual page index Lorenzo Stoakes (ARM)
2026-07-17 18:19 ` [PATCH 05/15] mm: introduce and use vma_filebacked_address() Lorenzo Stoakes (ARM)
2026-07-17 18:19 ` [PATCH 06/15] mm: propagate VMA virtual page offset on map, remap, split + merge Lorenzo Stoakes (ARM)
2026-07-17 18:19 ` [PATCH 07/15] mm/rmap: track whether the page VMA mapped walk is anonymous Lorenzo Stoakes (ARM)
2026-07-18 14:51 ` Lorenzo Stoakes (ARM) [this message]
2026-07-17 18:19 ` [PATCH 08/15] mm: introduce and use linear_folio_page_index() Lorenzo Stoakes (ARM)
2026-07-17 18:19 ` [PATCH 09/15] mm/rmap: use virt pgoff for MAP_PRIVATE file-backed anon folios Lorenzo Stoakes (ARM)
2026-07-17 18:19 ` [PATCH 10/15] tools/testing/vma: expand VMA merge tests to assert virt pgoff Lorenzo Stoakes (ARM)
2026-07-17 18:19 ` [PATCH 11/15] tools/testing/selftests/mm: test virtual page offset merge behaviour Lorenzo Stoakes (ARM)
2026-07-17 18:19 ` [PATCH 12/15] mm/vma: only permit MAP_PRIVATE /dev/zero to be mapped anonymous Lorenzo Stoakes (ARM)
2026-07-17 18:19 ` [PATCH 13/15] mm/vma: make MAP_PRIVATE-mapped /dev/zero mappings truly anonymous Lorenzo Stoakes (ARM)
2026-07-17 18:19 ` [PATCH 14/15] tools/testing/vma: add test to assert MAP_PRIVATE-/dev/zero is anon Lorenzo Stoakes (ARM)
2026-07-17 18:19 ` [PATCH 15/15] tools/testing/selftests/mm: add MAP_PRIVATE-/dev/zero merge tests Lorenzo Stoakes (ARM)
2026-07-18 6:47 ` [syzbot ci] Re: mm/rmap: index MAP_PRIVATE file-backed folios by virt pgoff syzbot ci
2026-07-18 14:40 ` Lorenzo Stoakes (ARM)
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