* [PATCH V3] mm/debug_vm_pgtable: Add [pte|pmd]_mkwrite_novma() tests
@ 2025-10-24 1:31 Anshuman Khandual
2025-10-24 2:00 ` Huang, Ying
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Anshuman Khandual @ 2025-10-24 1:31 UTC (permalink / raw)
To: linux-mm
Cc: Anshuman Khandual, Andrew Morton, David Hildenbrand, Huang Ying,
linux-kernel, Catalin Marinas
Add some [pte|pmd]_mkwrite_novma() relevant tests.
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Huang Ying <ying.huang@linux.alibaba.com>
Cc: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org
Suggested-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
These tests clear on arm64 platform after the following recent patch.
https://lore.kernel.org/all/20251015023712.46598-1-ying.huang@linux.alibaba.com/
Changes in V3:
- Added a new test combination per Huang
Changes in V2:
https://lore.kernel.org/all/20251022032951.3498553-1-anshuman.khandual@arm.com/
- Added a new test combination per Huang
Changes in V1:
https://lore.kernel.org/all/20251021024424.2390325-1-anshuman.khandual@arm.com/
mm/debug_vm_pgtable.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
index 830107b6dd08..133543ca2821 100644
--- a/mm/debug_vm_pgtable.c
+++ b/mm/debug_vm_pgtable.c
@@ -102,6 +102,12 @@ static void __init pte_basic_tests(struct pgtable_debug_args *args, int idx)
WARN_ON(pte_write(pte_wrprotect(pte_mkwrite(pte, args->vma))));
WARN_ON(pte_dirty(pte_wrprotect(pte_mkclean(pte))));
WARN_ON(!pte_dirty(pte_wrprotect(pte_mkdirty(pte))));
+
+ WARN_ON(!pte_dirty(pte_mkwrite_novma(pte_mkdirty(pte))));
+ WARN_ON(pte_dirty(pte_mkwrite_novma(pte_mkclean(pte))));
+ WARN_ON(!pte_write(pte_mkdirty(pte_mkwrite_novma(pte))));
+ WARN_ON(!pte_write(pte_mkwrite_novma(pte_wrprotect(pte))));
+ WARN_ON(pte_write(pte_wrprotect(pte_mkwrite_novma(pte))));
}
static void __init pte_advanced_tests(struct pgtable_debug_args *args)
@@ -195,6 +201,13 @@ static void __init pmd_basic_tests(struct pgtable_debug_args *args, int idx)
WARN_ON(pmd_write(pmd_wrprotect(pmd_mkwrite(pmd, args->vma))));
WARN_ON(pmd_dirty(pmd_wrprotect(pmd_mkclean(pmd))));
WARN_ON(!pmd_dirty(pmd_wrprotect(pmd_mkdirty(pmd))));
+
+ WARN_ON(!pmd_dirty(pmd_mkwrite_novma(pmd_mkdirty(pmd))));
+ WARN_ON(pmd_dirty(pmd_mkwrite_novma(pmd_mkclean(pmd))));
+ WARN_ON(!pmd_write(pmd_mkdirty(pmd_mkwrite_novma(pmd))));
+ WARN_ON(!pmd_write(pmd_mkwrite_novma(pmd_wrprotect(pmd))));
+ WARN_ON(pmd_write(pmd_wrprotect(pmd_mkwrite_novma(pmd))));
+
/*
* A huge page does not point to next level page table
* entry. Hence this must qualify as pmd_bad().
--
2.30.2
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH V3] mm/debug_vm_pgtable: Add [pte|pmd]_mkwrite_novma() tests
2025-10-24 1:31 [PATCH V3] mm/debug_vm_pgtable: Add [pte|pmd]_mkwrite_novma() tests Anshuman Khandual
@ 2025-10-24 2:00 ` Huang, Ying
2025-10-24 7:44 ` David Hildenbrand
2025-10-27 9:45 ` Catalin Marinas
2 siblings, 0 replies; 4+ messages in thread
From: Huang, Ying @ 2025-10-24 2:00 UTC (permalink / raw)
To: Anshuman Khandual
Cc: linux-mm, Andrew Morton, David Hildenbrand, linux-kernel,
Catalin Marinas
Anshuman Khandual <anshuman.khandual@arm.com> writes:
> Add some [pte|pmd]_mkwrite_novma() relevant tests.
>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: David Hildenbrand <david@redhat.com>
> Cc: Huang Ying <ying.huang@linux.alibaba.com>
> Cc: linux-mm@kvack.org
> Cc: linux-kernel@vger.kernel.org
> Suggested-by: Catalin Marinas <catalin.marinas@arm.com>
> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
> ---
> These tests clear on arm64 platform after the following recent patch.
>
> https://lore.kernel.org/all/20251015023712.46598-1-ying.huang@linux.alibaba.com/
>
> Changes in V3:
>
> - Added a new test combination per Huang
>
> Changes in V2:
>
> https://lore.kernel.org/all/20251022032951.3498553-1-anshuman.khandual@arm.com/
>
> - Added a new test combination per Huang
>
> Changes in V1:
>
> https://lore.kernel.org/all/20251021024424.2390325-1-anshuman.khandual@arm.com/
>
> mm/debug_vm_pgtable.c | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
> diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
> index 830107b6dd08..133543ca2821 100644
> --- a/mm/debug_vm_pgtable.c
> +++ b/mm/debug_vm_pgtable.c
> @@ -102,6 +102,12 @@ static void __init pte_basic_tests(struct pgtable_debug_args *args, int idx)
> WARN_ON(pte_write(pte_wrprotect(pte_mkwrite(pte, args->vma))));
> WARN_ON(pte_dirty(pte_wrprotect(pte_mkclean(pte))));
> WARN_ON(!pte_dirty(pte_wrprotect(pte_mkdirty(pte))));
> +
> + WARN_ON(!pte_dirty(pte_mkwrite_novma(pte_mkdirty(pte))));
> + WARN_ON(pte_dirty(pte_mkwrite_novma(pte_mkclean(pte))));
> + WARN_ON(!pte_write(pte_mkdirty(pte_mkwrite_novma(pte))));
> + WARN_ON(!pte_write(pte_mkwrite_novma(pte_wrprotect(pte))));
> + WARN_ON(pte_write(pte_wrprotect(pte_mkwrite_novma(pte))));
> }
>
> static void __init pte_advanced_tests(struct pgtable_debug_args *args)
> @@ -195,6 +201,13 @@ static void __init pmd_basic_tests(struct pgtable_debug_args *args, int idx)
> WARN_ON(pmd_write(pmd_wrprotect(pmd_mkwrite(pmd, args->vma))));
> WARN_ON(pmd_dirty(pmd_wrprotect(pmd_mkclean(pmd))));
> WARN_ON(!pmd_dirty(pmd_wrprotect(pmd_mkdirty(pmd))));
> +
> + WARN_ON(!pmd_dirty(pmd_mkwrite_novma(pmd_mkdirty(pmd))));
> + WARN_ON(pmd_dirty(pmd_mkwrite_novma(pmd_mkclean(pmd))));
> + WARN_ON(!pmd_write(pmd_mkdirty(pmd_mkwrite_novma(pmd))));
> + WARN_ON(!pmd_write(pmd_mkwrite_novma(pmd_wrprotect(pmd))));
> + WARN_ON(pmd_write(pmd_wrprotect(pmd_mkwrite_novma(pmd))));
> +
> /*
> * A huge page does not point to next level page table
> * entry. Hence this must qualify as pmd_bad().
LGTM, feel free to add my
Reviewed-by: Huang Ying <ying.huang@linux.alibaba.com>
in the future versions.
---
Best Regards,
Huang, Ying
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH V3] mm/debug_vm_pgtable: Add [pte|pmd]_mkwrite_novma() tests
2025-10-24 1:31 [PATCH V3] mm/debug_vm_pgtable: Add [pte|pmd]_mkwrite_novma() tests Anshuman Khandual
2025-10-24 2:00 ` Huang, Ying
@ 2025-10-24 7:44 ` David Hildenbrand
2025-10-27 9:45 ` Catalin Marinas
2 siblings, 0 replies; 4+ messages in thread
From: David Hildenbrand @ 2025-10-24 7:44 UTC (permalink / raw)
To: Anshuman Khandual, linux-mm
Cc: Andrew Morton, Huang Ying, linux-kernel, Catalin Marinas
On 24.10.25 03:31, Anshuman Khandual wrote:
> Add some [pte|pmd]_mkwrite_novma() relevant tests.
>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: David Hildenbrand <david@redhat.com>
> Cc: Huang Ying <ying.huang@linux.alibaba.com>
> Cc: linux-mm@kvack.org
> Cc: linux-kernel@vger.kernel.org
> Suggested-by: Catalin Marinas <catalin.marinas@arm.com>
> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
> ---
Acked-by: David Hildenbrand <david@redhat.com>
--
Cheers
David / dhildenb
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH V3] mm/debug_vm_pgtable: Add [pte|pmd]_mkwrite_novma() tests
2025-10-24 1:31 [PATCH V3] mm/debug_vm_pgtable: Add [pte|pmd]_mkwrite_novma() tests Anshuman Khandual
2025-10-24 2:00 ` Huang, Ying
2025-10-24 7:44 ` David Hildenbrand
@ 2025-10-27 9:45 ` Catalin Marinas
2 siblings, 0 replies; 4+ messages in thread
From: Catalin Marinas @ 2025-10-27 9:45 UTC (permalink / raw)
To: Anshuman Khandual
Cc: linux-mm, Andrew Morton, David Hildenbrand, Huang Ying, linux-kernel
On Fri, Oct 24, 2025 at 02:31:37AM +0100, Anshuman Khandual wrote:
> Add some [pte|pmd]_mkwrite_novma() relevant tests.
>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: David Hildenbrand <david@redhat.com>
> Cc: Huang Ying <ying.huang@linux.alibaba.com>
> Cc: linux-mm@kvack.org
> Cc: linux-kernel@vger.kernel.org
> Suggested-by: Catalin Marinas <catalin.marinas@arm.com>
> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
^ permalink raw reply [flat|nested] 4+ messages in thread
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2025-10-24 1:31 [PATCH V3] mm/debug_vm_pgtable: Add [pte|pmd]_mkwrite_novma() tests Anshuman Khandual
2025-10-24 2:00 ` Huang, Ying
2025-10-24 7:44 ` David Hildenbrand
2025-10-27 9:45 ` Catalin Marinas
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