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: "Lorenzo Stoakes (ARM)" <ljs@kernel.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: [PATCH v3 10/15] tools/testing/vma: expand VMA merge tests to assert anon pgoff
Date: Wed, 29 Jul 2026 17:48:45 +0100 [thread overview]
Message-ID: <20260729-b4-scalable-cow-virt-pgoff-v3-10-e8ecfefea812@kernel.org> (raw)
In-Reply-To: <20260729-b4-scalable-cow-virt-pgoff-v3-0-e8ecfefea812@kernel.org>
Now we have introduced the VMA anonymous page offset attribute and update
it when VMAs are manipulated, update VMA merge tests to assert that the
anonymous page offset is as expected.
Also update instances where we could use vma_start_pgoff() to do so.
Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
---
tools/testing/vma/tests/merge.c | 45 ++++++++++++++++++++++++++++++++---------
1 file changed, 36 insertions(+), 9 deletions(-)
diff --git a/tools/testing/vma/tests/merge.c b/tools/testing/vma/tests/merge.c
index 48418b82b01d..acaab282939c 100644
--- a/tools/testing/vma/tests/merge.c
+++ b/tools/testing/vma/tests/merge.c
@@ -121,6 +121,7 @@ static bool test_simple_merge(void)
ASSERT_EQ(vma->vm_start, 0);
ASSERT_EQ(vma->vm_end, 0x3000);
ASSERT_EQ(vma_start_pgoff(vma), 0);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 0);
ASSERT_FLAGS_SAME_MASK(&vma->flags, vma_flags);
detach_free_vma(vma);
@@ -153,6 +154,7 @@ static bool test_simple_modify(void)
ASSERT_EQ(vma->vm_start, 0x1000);
ASSERT_EQ(vma->vm_end, 0x2000);
ASSERT_EQ(vma_start_pgoff(vma), 1);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 1);
/*
* Now walk through the three split VMAs and make sure they are as
@@ -165,6 +167,7 @@ static bool test_simple_modify(void)
ASSERT_EQ(vma->vm_start, 0);
ASSERT_EQ(vma->vm_end, 0x1000);
ASSERT_EQ(vma_start_pgoff(vma), 0);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 0);
detach_free_vma(vma);
vma_iter_clear(&vmi);
@@ -174,6 +177,7 @@ static bool test_simple_modify(void)
ASSERT_EQ(vma->vm_start, 0x1000);
ASSERT_EQ(vma->vm_end, 0x2000);
ASSERT_EQ(vma_start_pgoff(vma), 1);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 1);
detach_free_vma(vma);
vma_iter_clear(&vmi);
@@ -183,6 +187,7 @@ static bool test_simple_modify(void)
ASSERT_EQ(vma->vm_start, 0x2000);
ASSERT_EQ(vma->vm_end, 0x3000);
ASSERT_EQ(vma_start_pgoff(vma), 2);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 2);
detach_free_vma(vma);
mtree_destroy(&mm.mm_mt);
@@ -212,6 +217,7 @@ static bool test_simple_expand(void)
ASSERT_EQ(vma->vm_start, 0);
ASSERT_EQ(vma->vm_end, 0x3000);
ASSERT_EQ(vma_start_pgoff(vma), 0);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 0);
detach_free_vma(vma);
mtree_destroy(&mm.mm_mt);
@@ -234,6 +240,7 @@ static bool test_simple_shrink(void)
ASSERT_EQ(vma->vm_start, 0);
ASSERT_EQ(vma->vm_end, 0x1000);
ASSERT_EQ(vma_start_pgoff(vma), 0);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 0);
detach_free_vma(vma);
mtree_destroy(&mm.mm_mt);
@@ -346,6 +353,7 @@ static bool __test_merge_new(bool is_sticky, bool a_is_sticky, bool b_is_sticky,
ASSERT_EQ(vma->vm_start, 0);
ASSERT_EQ(vma->vm_end, 0x5000);
ASSERT_EQ(vma_start_pgoff(vma), 0);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 0);
ASSERT_EQ(vma->anon_vma, &dummy_anon_vma);
ASSERT_TRUE(vma_write_started(vma));
ASSERT_EQ(mm.map_count, 3);
@@ -367,6 +375,7 @@ static bool __test_merge_new(bool is_sticky, bool a_is_sticky, bool b_is_sticky,
ASSERT_EQ(vma->vm_start, 0x6000);
ASSERT_EQ(vma->vm_end, 0x9000);
ASSERT_EQ(vma_start_pgoff(vma), 6);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 6);
ASSERT_EQ(vma->anon_vma, &dummy_anon_vma);
ASSERT_TRUE(vma_write_started(vma));
ASSERT_EQ(mm.map_count, 3);
@@ -387,6 +396,7 @@ static bool __test_merge_new(bool is_sticky, bool a_is_sticky, bool b_is_sticky,
ASSERT_EQ(vma->vm_start, 0);
ASSERT_EQ(vma->vm_end, 0x9000);
ASSERT_EQ(vma_start_pgoff(vma), 0);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 0);
ASSERT_EQ(vma->anon_vma, &dummy_anon_vma);
ASSERT_TRUE(vma_write_started(vma));
ASSERT_EQ(mm.map_count, 2);
@@ -407,6 +417,7 @@ static bool __test_merge_new(bool is_sticky, bool a_is_sticky, bool b_is_sticky,
ASSERT_EQ(vma->vm_start, 0xa000);
ASSERT_EQ(vma->vm_end, 0xc000);
ASSERT_EQ(vma_start_pgoff(vma), 0xa);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 0xa);
ASSERT_EQ(vma->anon_vma, &dummy_anon_vma);
ASSERT_TRUE(vma_write_started(vma));
ASSERT_EQ(mm.map_count, 2);
@@ -426,6 +437,7 @@ static bool __test_merge_new(bool is_sticky, bool a_is_sticky, bool b_is_sticky,
ASSERT_EQ(vma->vm_start, 0);
ASSERT_EQ(vma->vm_end, 0xc000);
ASSERT_EQ(vma_start_pgoff(vma), 0);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 0);
ASSERT_EQ(vma->anon_vma, &dummy_anon_vma);
ASSERT_TRUE(vma_write_started(vma));
ASSERT_EQ(mm.map_count, 1);
@@ -446,6 +458,7 @@ static bool __test_merge_new(bool is_sticky, bool a_is_sticky, bool b_is_sticky,
ASSERT_EQ(vma->vm_start, 0);
ASSERT_EQ(vma->vm_end, 0xc000);
ASSERT_EQ(vma_start_pgoff(vma), 0);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 0);
ASSERT_EQ(vma->anon_vma, &dummy_anon_vma);
detach_free_vma(vma);
@@ -642,7 +655,8 @@ static bool test_vma_merge_with_close(void)
ASSERT_EQ(vmg.state, VMA_MERGE_SUCCESS);
ASSERT_EQ(vma_prev->vm_start, 0);
ASSERT_EQ(vma_prev->vm_end, 0x5000);
- ASSERT_EQ(vma_prev->vm_pgoff, 0);
+ ASSERT_EQ(vma_start_pgoff(vma_prev), 0);
+ ASSERT_EQ(vma_start_anon_pgoff(vma_prev), 0);
ASSERT_EQ(cleanup_mm(&mm, &vmi), 2);
@@ -753,7 +767,8 @@ static bool test_vma_merge_with_close(void)
ASSERT_EQ(vmg.state, VMA_MERGE_SUCCESS);
ASSERT_EQ(vma_prev->vm_start, 0);
ASSERT_EQ(vma_prev->vm_end, 0x5000);
- ASSERT_EQ(vma_prev->vm_pgoff, 0);
+ ASSERT_EQ(vma_start_pgoff(vma_prev), 0);
+ ASSERT_EQ(vma_start_anon_pgoff(vma_prev), 0);
ASSERT_EQ(cleanup_mm(&mm, &vmi), 2);
@@ -808,6 +823,7 @@ static bool test_vma_merge_new_with_close(void)
ASSERT_EQ(vma->vm_start, 0);
ASSERT_EQ(vma->vm_end, 0x5000);
ASSERT_EQ(vma_start_pgoff(vma), 0);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 0);
ASSERT_EQ(vma->vm_ops, &vm_ops);
ASSERT_TRUE(vma_write_started(vma));
ASSERT_EQ(mm.map_count, 2);
@@ -863,11 +879,13 @@ static bool __test_merge_existing(bool prev_is_sticky, bool middle_is_sticky, bo
ASSERT_EQ(vmg.state, VMA_MERGE_SUCCESS);
ASSERT_EQ(vma_next->vm_start, 0x3000);
ASSERT_EQ(vma_next->vm_end, 0x9000);
- ASSERT_EQ(vma_next->vm_pgoff, 3);
+ ASSERT_EQ(vma_start_pgoff(vma_next), 3);
+ ASSERT_EQ(vma_start_anon_pgoff(vma_next), 3);
ASSERT_EQ(vma_next->anon_vma, &dummy_anon_vma);
ASSERT_EQ(vma->vm_start, 0x2000);
ASSERT_EQ(vma->vm_end, 0x3000);
ASSERT_EQ(vma_start_pgoff(vma), 2);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 2);
ASSERT_TRUE(vma_write_started(vma));
ASSERT_TRUE(vma_write_started(vma_next));
ASSERT_EQ(mm.map_count, 2);
@@ -897,7 +915,8 @@ static bool __test_merge_existing(bool prev_is_sticky, bool middle_is_sticky, bo
ASSERT_EQ(vmg.state, VMA_MERGE_SUCCESS);
ASSERT_EQ(vma_next->vm_start, 0x2000);
ASSERT_EQ(vma_next->vm_end, 0x9000);
- ASSERT_EQ(vma_next->vm_pgoff, 2);
+ ASSERT_EQ(vma_start_pgoff(vma_next), 2);
+ ASSERT_EQ(vma_start_anon_pgoff(vma_next), 2);
ASSERT_EQ(vma_next->anon_vma, &dummy_anon_vma);
ASSERT_TRUE(vma_write_started(vma_next));
ASSERT_EQ(mm.map_count, 1);
@@ -929,11 +948,13 @@ static bool __test_merge_existing(bool prev_is_sticky, bool middle_is_sticky, bo
ASSERT_EQ(vmg.state, VMA_MERGE_SUCCESS);
ASSERT_EQ(vma_prev->vm_start, 0);
ASSERT_EQ(vma_prev->vm_end, 0x6000);
- ASSERT_EQ(vma_prev->vm_pgoff, 0);
+ ASSERT_EQ(vma_start_pgoff(vma_prev), 0);
+ ASSERT_EQ(vma_start_anon_pgoff(vma_prev), 0);
ASSERT_EQ(vma_prev->anon_vma, &dummy_anon_vma);
ASSERT_EQ(vma->vm_start, 0x6000);
ASSERT_EQ(vma->vm_end, 0x7000);
ASSERT_EQ(vma_start_pgoff(vma), 6);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 6);
ASSERT_TRUE(vma_write_started(vma_prev));
ASSERT_TRUE(vma_write_started(vma));
ASSERT_EQ(mm.map_count, 2);
@@ -964,7 +985,8 @@ static bool __test_merge_existing(bool prev_is_sticky, bool middle_is_sticky, bo
ASSERT_EQ(vmg.state, VMA_MERGE_SUCCESS);
ASSERT_EQ(vma_prev->vm_start, 0);
ASSERT_EQ(vma_prev->vm_end, 0x7000);
- ASSERT_EQ(vma_prev->vm_pgoff, 0);
+ ASSERT_EQ(vma_start_pgoff(vma_prev), 0);
+ ASSERT_EQ(vma_start_anon_pgoff(vma_prev), 0);
ASSERT_EQ(vma_prev->anon_vma, &dummy_anon_vma);
ASSERT_TRUE(vma_write_started(vma_prev));
ASSERT_EQ(mm.map_count, 1);
@@ -996,7 +1018,8 @@ static bool __test_merge_existing(bool prev_is_sticky, bool middle_is_sticky, bo
ASSERT_EQ(vmg.state, VMA_MERGE_SUCCESS);
ASSERT_EQ(vma_prev->vm_start, 0);
ASSERT_EQ(vma_prev->vm_end, 0x9000);
- ASSERT_EQ(vma_prev->vm_pgoff, 0);
+ ASSERT_EQ(vma_start_pgoff(vma_prev), 0);
+ ASSERT_EQ(vma_start_anon_pgoff(vma_prev), 0);
ASSERT_EQ(vma_prev->anon_vma, &dummy_anon_vma);
ASSERT_TRUE(vma_write_started(vma_prev));
ASSERT_EQ(mm.map_count, 1);
@@ -1126,7 +1149,8 @@ static bool test_anon_vma_non_mergeable(void)
ASSERT_EQ(vmg.state, VMA_MERGE_SUCCESS);
ASSERT_EQ(vma_prev->vm_start, 0);
ASSERT_EQ(vma_prev->vm_end, 0x7000);
- ASSERT_EQ(vma_prev->vm_pgoff, 0);
+ ASSERT_EQ(vma_start_pgoff(vma_prev), 0);
+ ASSERT_EQ(vma_start_anon_pgoff(vma_prev), 0);
ASSERT_TRUE(vma_write_started(vma_prev));
ASSERT_FALSE(vma_write_started(vma_next));
@@ -1157,7 +1181,8 @@ static bool test_anon_vma_non_mergeable(void)
ASSERT_EQ(vmg.state, VMA_MERGE_SUCCESS);
ASSERT_EQ(vma_prev->vm_start, 0);
ASSERT_EQ(vma_prev->vm_end, 0x7000);
- ASSERT_EQ(vma_prev->vm_pgoff, 0);
+ ASSERT_EQ(vma_start_pgoff(vma_prev), 0);
+ ASSERT_EQ(vma_start_anon_pgoff(vma_prev), 0);
ASSERT_TRUE(vma_write_started(vma_prev));
ASSERT_FALSE(vma_write_started(vma_next));
@@ -1419,6 +1444,7 @@ static bool test_merge_extend(void)
ASSERT_EQ(vma->vm_start, 0);
ASSERT_EQ(vma->vm_end, 0x4000);
ASSERT_EQ(vma_start_pgoff(vma), 0);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 0);
ASSERT_TRUE(vma_write_started(vma));
ASSERT_EQ(mm.map_count, 1);
@@ -1459,6 +1485,7 @@ static bool test_expand_only_mode(void)
ASSERT_EQ(vma->vm_start, 0x3000);
ASSERT_EQ(vma->vm_end, 0x9000);
ASSERT_EQ(vma_start_pgoff(vma), 3);
+ ASSERT_EQ(vma_start_anon_pgoff(vma), 3);
ASSERT_TRUE(vma_write_started(vma));
ASSERT_EQ(vma_iter_addr(&vmi), 0x3000);
vma_assert_attached(vma);
--
2.55.0
next prev parent reply other threads:[~2026-07-29 16:50 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-29 16:48 [PATCH v3 00/15] mm/rmap: index MAP_PRIVATE file-backed folios by anonymous pgoff Lorenzo Stoakes (ARM)
2026-07-29 16:48 ` [PATCH v3 01/15] mm/vma: introduce VMA anon page offset field and add helpers Lorenzo Stoakes (ARM)
2026-07-29 17:11 ` Lorenzo Stoakes (ARM)
2026-07-30 3:32 ` Gregory Price
2026-08-03 9:28 ` David Hildenbrand (Arm)
2026-08-03 9:46 ` Lorenzo Stoakes (ARM)
2026-08-03 9:58 ` David Hildenbrand (Arm)
2026-08-03 10:13 ` Lorenzo Stoakes (ARM)
2026-07-29 16:48 ` [PATCH v3 02/15] mm: introduce linear_anon_page_index() Lorenzo Stoakes (ARM)
2026-07-30 6:28 ` Gregory Price
2026-08-03 9:34 ` David Hildenbrand (Arm)
2026-08-03 10:10 ` Lorenzo Stoakes (ARM)
2026-07-29 16:48 ` [PATCH v3 03/15] mm: abstract vma_address() and introduce vma_anon_address() Lorenzo Stoakes (ARM)
2026-07-30 4:58 ` Gregory Price
2026-07-30 6:39 ` Gregory Price
2026-07-30 10:16 ` Lorenzo Stoakes (ARM)
2026-08-03 9:37 ` David Hildenbrand (Arm)
2026-07-29 16:48 ` [PATCH v3 04/15] mm: update print_bad_page_map() to show anonymous page index Lorenzo Stoakes (ARM)
2026-07-30 6:32 ` Gregory Price
2026-08-03 9:39 ` David Hildenbrand (Arm)
2026-08-03 10:19 ` Lorenzo Stoakes (ARM)
2026-08-05 8:30 ` Gregory Price
2026-08-05 9:01 ` Lorenzo Stoakes (ARM)
2026-08-06 15:14 ` Lorenzo Stoakes (ARM)
2026-08-06 16:54 ` Matthew Wilcox
2026-08-06 17:18 ` Lorenzo Stoakes (ARM)
2026-08-03 9:39 ` David Hildenbrand (Arm)
2026-07-29 16:48 ` [PATCH v3 05/15] mm: introduce and use vma_filebacked_address() Lorenzo Stoakes (ARM)
2026-08-03 9:54 ` David Hildenbrand (Arm)
2026-08-03 10:15 ` Lorenzo Stoakes (ARM)
2026-07-29 16:48 ` [PATCH v3 06/15] mm: propagate VMA anonymous page offset on map, remap, split + merge Lorenzo Stoakes (ARM)
2026-08-03 10:52 ` David Hildenbrand (Arm)
2026-08-03 13:46 ` Lorenzo Stoakes (ARM)
2026-08-05 7:35 ` David Hildenbrand (Arm)
2026-08-05 8:59 ` Lorenzo Stoakes (ARM)
2026-08-05 9:19 ` David Hildenbrand (Arm)
2026-08-05 9:29 ` Lorenzo Stoakes (ARM)
2026-07-29 16:48 ` [PATCH v3 07/15] mm/rmap: track whether the page VMA mapped pgoff is anonymous Lorenzo Stoakes (ARM)
2026-08-03 10:57 ` David Hildenbrand (Arm)
2026-08-03 13:51 ` Lorenzo Stoakes (ARM)
2026-08-03 14:02 ` David Hildenbrand (Arm)
2026-08-03 14:32 ` Lorenzo Stoakes (ARM)
2026-08-05 7:17 ` David Hildenbrand (Arm)
2026-08-05 7:25 ` Lorenzo Stoakes (ARM)
2026-07-29 16:48 ` [PATCH v3 08/15] mm: introduce and use linear_folio_page_index() Lorenzo Stoakes (ARM)
2026-08-03 11:27 ` David Hildenbrand (Arm)
2026-08-03 14:30 ` Lorenzo Stoakes (ARM)
2026-08-05 7:26 ` David Hildenbrand (Arm)
2026-08-05 9:02 ` Lorenzo Stoakes (ARM)
2026-07-29 16:48 ` [PATCH v3 09/15] mm/rmap: use anon pgoff to track MAP_PRIVATE file-backed anon folios Lorenzo Stoakes (ARM)
2026-08-03 11:32 ` David Hildenbrand (Arm)
2026-08-03 14:30 ` Lorenzo Stoakes (ARM)
2026-07-29 16:48 ` Lorenzo Stoakes (ARM) [this message]
2026-07-29 16:48 ` [PATCH v3 11/15] tools/testing/selftests/mm: test anonymous page offset merge behaviour Lorenzo Stoakes (ARM)
2026-07-29 16:48 ` [PATCH v3 12/15] mm/vma: only permit MAP_PRIVATE /dev/zero to be mapped anonymous Lorenzo Stoakes (ARM)
2026-07-29 16:48 ` [PATCH v3 13/15] mm/vma: make MAP_PRIVATE-mapped /dev/zero mappings truly anonymous Lorenzo Stoakes (ARM)
2026-07-29 16:48 ` [PATCH v3 14/15] tools/testing/vma: add test to assert MAP_PRIVATE-/dev/zero is anon Lorenzo Stoakes (ARM)
2026-07-29 16:48 ` [PATCH v3 15/15] tools/testing/selftests/mm: add MAP_PRIVATE-/dev/zero merge tests Lorenzo Stoakes (ARM)
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