Re: + mm-huge_memory-bypass-thp-tuneables-for-huge-pfnmap-mappings-fix.patch added to mm-hotfixes-unstable branch

["Zi Yan" <ziy@nvidia.com>]

On Fri Aug 28, 2026 at 1:38 PM EDT, Andrew Morton wrote:
>
> The patch titled
>      Subject: mm-huge_memory-bypass-thp-tuneables-for-huge-pfnmap-mappings-fix
> has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
>      mm-huge_memory-bypass-thp-tuneables-for-huge-pfnmap-mappings-fix.patch
>
> This patch will shortly appear at
>      https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-huge_memory-bypass-thp-tuneables-for-huge-pfnmap-mappings-fix.patch
>
> This patch will later appear in the mm-hotfixes-unstable branch at
>     git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
>
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>
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>
> 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
>
Hi Andrew,

The patch below is what I suggested. Lorenzo, could you let me know if
you are OK with it. Thanks.

From 94d78f3d6ba2c1acb841535f934eeef4053c531c Mon Sep 17 00:00:00 2001
From: Zi Yan <ziy@nvidia.com>
Date: Sat, 29 Aug 2026 10:02:02 -0400
Subject: [PATCH] renames for Lorenzo's
 mm-huge_memory-bypass-thp-tuneables-for-huge-pfnmap-mappings patch

Signed-off-by: Zi Yan <ziy@nvidia.com>
---
 mm/huge_memory.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 4bf7b670586df..1e5d68acf62a5 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -118,7 +118,7 @@ static bool vma_is_special_huge(const struct vm_area_struct *vma)
 	return vma_test_any(vma, VMA_PFNMAP_BIT, VMA_MIXEDMAP_BIT);
 }
 
-static bool vma_bypass_thp_tuneables_file(const struct vm_area_struct *vma,
+static bool vma_file_bypass_thp_tuneables(const struct vm_area_struct *vma,
 		enum tva_type type)
 {
 	const bool has_huge_fault = vma->vm_ops->huge_fault;
@@ -132,7 +132,7 @@ static bool vma_bypass_thp_tuneables_file(const struct vm_area_struct *vma,
 	return false;
 }
 
-static bool vma_thp_tuneables_allow_file(vm_flags_t vm_flags)
+static bool vma_file_allow_thp_tuneables(vm_flags_t vm_flags)
 {
 	/* THP=always? */
 	if (hugepage_global_always())
@@ -143,11 +143,11 @@ static bool vma_thp_tuneables_allow_file(vm_flags_t vm_flags)
 	return false;
 }
 
-static bool vma_check_thp_tuneables_file(const struct vm_area_struct *vma,
+static bool vma_file_check_thp_tuneables(const struct vm_area_struct *vma,
 		vm_flags_t vm_flags, enum tva_type type)
 {
-	return vma_bypass_thp_tuneables_file(vma, type) ||
-		vma_thp_tuneables_allow_file(vm_flags);
+	return vma_file_bypass_thp_tuneables(vma, type) ||
+		vma_file_allow_thp_tuneables(vm_flags);
 }
 
 static bool vma_can_map_huge_file(const struct vm_area_struct *vma,
@@ -159,7 +159,7 @@ static bool vma_can_map_huge_file(const struct vm_area_struct *vma,
 	 * Enforce THP collapse requirements as necessary. Anonymous vmas
 	 * were already handled in thp_vma_allowable_orders().
 	 */
-	if (!vma_check_thp_tuneables_file(vma, vm_flags, type))
+	if (!vma_file_check_thp_tuneables(vma, vm_flags, type))
 		return false;
 
 	switch (type) {
-- 
2.53.0


> ------------------------------------------------------
> From: Andrew Morton <akpm@linux-foundation.org>
> Subject: mm-huge_memory-bypass-thp-tuneables-for-huge-pfnmap-mappings-fix
> Date: Fri Aug 28 10:35:55 AM PDT 2026
>
> s/vma_check_thp_tuneables_file/vma_file_check_thp_tuneables/, per Zi Yan
>
> Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
> Cc: Barry Song <baohua@kernel.org>
> Cc: Cedric Le Goater <clg@redhat.com>
> Cc: David Hildenbrand <david@kernel.org>
> Cc: Dev Jain <dev.jain@arm.com>
> Cc: Jason Gunthorpe <jgg@ziepe.ca>
> Cc: Lance Yang <lance.yang@linux.dev>
> Cc: Liam R. Howlett <liam@infradead.org>
> Cc: "Lorenzo Stoakes (ARM)" <ljs@kernel.org>
> Cc: Peter Xu <peterx@redhat.com>
> Cc: Ryan Roberts <ryan.roberts@arm.com>
> Cc: Saravanan D <saravanand@crusoe.ai>
> Cc: Zi Yan <ziy@nvidia.com>
> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
> ---
>
>  mm/huge_memory.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> --- a/mm/huge_memory.c~mm-huge_memory-bypass-thp-tuneables-for-huge-pfnmap-mappings-fix
> +++ a/mm/huge_memory.c
> @@ -143,7 +143,7 @@ static bool vma_thp_tuneables_allow_file
>  	return false;
>  }
>  
> -static bool vma_check_thp_tuneables_file(const struct vm_area_struct *vma,
> +static bool vma_file_check_thp_tuneables(const struct vm_area_struct *vma,
>  		vm_flags_t vm_flags, enum tva_type type)
>  {
>  	return vma_bypass_thp_tuneables_file(vma, type) ||
> @@ -159,7 +159,7 @@ static bool vma_can_map_huge_file(const
>  	 * Enforce THP collapse requirements as necessary. Anonymous vmas
>  	 * were already handled in thp_vma_allowable_orders().
>  	 */
> -	if (!vma_check_thp_tuneables_file(vma, vm_flags, type))
> +	if (!vma_file_check_thp_tuneables(vma, vm_flags, type))
>  		return false;
>  
>  	switch (type) {
> _
>
> Patches currently in -mm which might be from akpm@linux-foundation.org are
>
> mm-huge_memory-bypass-thp-tuneables-for-huge-pfnmap-mappings-fix.patch
> drivers-media-v4l2-core-v4l2-vp9c-reduce-inlining.patch




-- 
Best Regards,
Yan, Zi