Hi all,
This series contains cleanups to remove dedicated macro and remove
unnecessary tlb_remove_page_size() for huge zero pmd. Also this adds
missing read-only THP checking for transparent_hugepage_enabled() and
avoids discarding hugepage if other processes are mapping it. More
details can be found in the respective changelogs. Thanks!
v2->v3:
collect Reviewed-by and Acked-by tag
rename transhuge_vma_enabled to transparent_hugepage_active and
add helper file_thp_enabled per David Hildenbrand
v1->v2:
collect Reviewed-by tag
add missing check for read-only THP per Yang Shi
Miaohe Lin (5):
mm/huge_memory.c: remove dedicated macro HPAGE_CACHE_INDEX_MASK
mm/huge_memory.c: use page->deferred_list
mm/huge_memory.c: add missing read-only THP checking in
transparent_hugepage_enabled()
mm/huge_memory.c: remove unnecessary tlb_remove_page_size() for huge
zero pmd
mm/huge_memory.c: don't discard hugepage if other processes are
mapping it
fs/proc/task_mmu.c | 2 +-
include/linux/huge_mm.h | 33 ++++++++++++++++++++++-----------
mm/huge_memory.c | 20 +++++++++++++-------
mm/khugepaged.c | 4 +---
mm/shmem.c | 3 +--
5 files changed, 38 insertions(+), 24 deletions(-)
--
2.23.0
Rewrite the pgoff checking logic to remove macro HPAGE_CACHE_INDEX_MASK
which is only used here to simplify the code.
Reviewed-by: Yang Shi <[email protected]>
Reviewed-by: Anshuman Khandual <[email protected]>
Reviewed-by: David Hildenbrand <[email protected]>
Signed-off-by: Miaohe Lin <[email protected]>
---
include/linux/huge_mm.h | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
index 9626fda5efce..0a526f211fec 100644
--- a/include/linux/huge_mm.h
+++ b/include/linux/huge_mm.h
@@ -152,15 +152,13 @@ static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma)
bool transparent_hugepage_enabled(struct vm_area_struct *vma);
-#define HPAGE_CACHE_INDEX_MASK (HPAGE_PMD_NR - 1)
-
static inline bool transhuge_vma_suitable(struct vm_area_struct *vma,
unsigned long haddr)
{
/* Don't have to check pgoff for anonymous vma */
if (!vma_is_anonymous(vma)) {
- if (((vma->vm_start >> PAGE_SHIFT) & HPAGE_CACHE_INDEX_MASK) !=
- (vma->vm_pgoff & HPAGE_CACHE_INDEX_MASK))
+ if (!IS_ALIGNED((vma->vm_start >> PAGE_SHIFT) - vma->vm_pgoff,
+ HPAGE_PMD_NR))
return false;
}
--
2.23.0
If other processes are mapping any other subpages of the hugepage, i.e. in
pte-mapped thp case, page_mapcount() will return 1 incorrectly. Then we
would discard the page while other processes are still mapping it. Fix it
by using total_mapcount() which can tell whether other processes are still
mapping it.
Fixes: b8d3c4c3009d ("mm/huge_memory.c: don't split THP page when MADV_FREE syscall is called")
Reviewed-by: Yang Shi <[email protected]>
Signed-off-by: Miaohe Lin <[email protected]>
---
mm/huge_memory.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index b8e67332806f..24647fe076b8 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1610,7 +1610,7 @@ bool madvise_free_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma,
* If other processes are mapping this page, we couldn't discard
* the page unless they all do MADV_FREE so let's skip the page.
*/
- if (page_mapcount(page) != 1)
+ if (total_mapcount(page) != 1)
goto out;
if (!trylock_page(page))
--
2.23.0
Since commit 99cb0dbd47a1 ("mm,thp: add read-only THP support for
(non-shmem) FS"), read-only THP file mapping is supported. But it
forgot to add checking for it in transparent_hugepage_enabled().
To fix it, we add checking for read-only THP file mapping and also
introduce helper transhuge_vma_enabled() to check whether thp is
enabled for specified vma to reduce duplicated code. We rename
transparent_hugepage_enabled to transparent_hugepage_active to make
the code easier to follow as suggested by David Hildenbrand.
Fixes: 99cb0dbd47a1 ("mm,thp: add read-only THP support for (non-shmem) FS")
Signed-off-by: Miaohe Lin <[email protected]>
---
fs/proc/task_mmu.c | 2 +-
include/linux/huge_mm.h | 27 ++++++++++++++++++++-------
mm/huge_memory.c | 11 ++++++++++-
mm/khugepaged.c | 4 +---
mm/shmem.c | 3 +--
5 files changed, 33 insertions(+), 14 deletions(-)
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index fc9784544b24..7389df326edd 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -832,7 +832,7 @@ static int show_smap(struct seq_file *m, void *v)
__show_smap(m, &mss, false);
seq_printf(m, "THPeligible: %d\n",
- transparent_hugepage_enabled(vma));
+ transparent_hugepage_active(vma));
if (arch_pkeys_enabled())
seq_printf(m, "ProtectionKey: %8u\n", vma_pkey(vma));
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
index 0a526f211fec..a35c13d1f487 100644
--- a/include/linux/huge_mm.h
+++ b/include/linux/huge_mm.h
@@ -115,9 +115,19 @@ extern struct kobj_attribute shmem_enabled_attr;
extern unsigned long transparent_hugepage_flags;
+static inline bool transhuge_vma_enabled(struct vm_area_struct *vma,
+ unsigned long vm_flags)
+{
+ /* Explicitly disabled through madvise. */
+ if ((vm_flags & VM_NOHUGEPAGE) ||
+ test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags))
+ return false;
+ return true;
+}
+
/*
* to be used on vmas which are known to support THP.
- * Use transparent_hugepage_enabled otherwise
+ * Use transparent_hugepage_active otherwise
*/
static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma)
{
@@ -128,15 +138,12 @@ static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma)
if (transparent_hugepage_flags & (1 << TRANSPARENT_HUGEPAGE_NEVER_DAX))
return false;
- if (vma->vm_flags & VM_NOHUGEPAGE)
+ if (!transhuge_vma_enabled(vma, vma->vm_flags))
return false;
if (vma_is_temporary_stack(vma))
return false;
- if (test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags))
- return false;
-
if (transparent_hugepage_flags & (1 << TRANSPARENT_HUGEPAGE_FLAG))
return true;
@@ -150,7 +157,7 @@ static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma)
return false;
}
-bool transparent_hugepage_enabled(struct vm_area_struct *vma);
+bool transparent_hugepage_active(struct vm_area_struct *vma);
static inline bool transhuge_vma_suitable(struct vm_area_struct *vma,
unsigned long haddr)
@@ -351,7 +358,7 @@ static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma)
return false;
}
-static inline bool transparent_hugepage_enabled(struct vm_area_struct *vma)
+static inline bool transparent_hugepage_active(struct vm_area_struct *vma)
{
return false;
}
@@ -362,6 +369,12 @@ static inline bool transhuge_vma_suitable(struct vm_area_struct *vma,
return false;
}
+static inline bool transhuge_vma_enabled(struct vm_area_struct *vma,
+ unsigned long vm_flags)
+{
+ return false;
+}
+
static inline void prep_transhuge_page(struct page *page) {}
static inline bool is_transparent_hugepage(struct page *page)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 76ca1eb2a223..4f37867eed12 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -63,7 +63,14 @@ static struct shrinker deferred_split_shrinker;
static atomic_t huge_zero_refcount;
struct page *huge_zero_page __read_mostly;
-bool transparent_hugepage_enabled(struct vm_area_struct *vma)
+static inline bool file_thp_enabled(struct vm_area_struct *vma)
+{
+ return transhuge_vma_enabled(vma, vma->vm_flags) && vma->vm_file &&
+ !inode_is_open_for_write(vma->vm_file->f_inode) &&
+ (vma->vm_flags & VM_EXEC);
+}
+
+bool transparent_hugepage_active(struct vm_area_struct *vma)
{
/* The addr is used to check if the vma size fits */
unsigned long addr = (vma->vm_end & HPAGE_PMD_MASK) - HPAGE_PMD_SIZE;
@@ -74,6 +81,8 @@ bool transparent_hugepage_enabled(struct vm_area_struct *vma)
return __transparent_hugepage_enabled(vma);
if (vma_is_shmem(vma))
return shmem_huge_enabled(vma);
+ if (IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS))
+ return file_thp_enabled(vma);
return false;
}
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 6c0185fdd815..d97b20fad6e8 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -442,9 +442,7 @@ static inline int khugepaged_test_exit(struct mm_struct *mm)
static bool hugepage_vma_check(struct vm_area_struct *vma,
unsigned long vm_flags)
{
- /* Explicitly disabled through madvise. */
- if ((vm_flags & VM_NOHUGEPAGE) ||
- test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags))
+ if (!transhuge_vma_enabled(vma, vm_flags))
return false;
/* Enabled via shmem mount options or sysfs settings. */
diff --git a/mm/shmem.c b/mm/shmem.c
index a08cedefbfaa..1dcbec313c70 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4032,8 +4032,7 @@ bool shmem_huge_enabled(struct vm_area_struct *vma)
loff_t i_size;
pgoff_t off;
- if ((vma->vm_flags & VM_NOHUGEPAGE) ||
- test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags))
+ if (!transhuge_vma_enabled(vma, vma->vm_flags))
return false;
if (shmem_huge == SHMEM_HUGE_FORCE)
return true;
--
2.23.0
On Tue, May 11, 2021 at 6:49 AM Miaohe Lin <[email protected]> wrote:
>
> Since commit 99cb0dbd47a1 ("mm,thp: add read-only THP support for
> (non-shmem) FS"), read-only THP file mapping is supported. But it
> forgot to add checking for it in transparent_hugepage_enabled().
> To fix it, we add checking for read-only THP file mapping and also
> introduce helper transhuge_vma_enabled() to check whether thp is
> enabled for specified vma to reduce duplicated code. We rename
> transparent_hugepage_enabled to transparent_hugepage_active to make
> the code easier to follow as suggested by David Hildenbrand.
>
> Fixes: 99cb0dbd47a1 ("mm,thp: add read-only THP support for (non-shmem) FS")
> Signed-off-by: Miaohe Lin <[email protected]>
Looks correct to me. Reviewed-by: Yang Shi <[email protected]>
Just a nit below:
> ---
> fs/proc/task_mmu.c | 2 +-
> include/linux/huge_mm.h | 27 ++++++++++++++++++++-------
> mm/huge_memory.c | 11 ++++++++++-
> mm/khugepaged.c | 4 +---
> mm/shmem.c | 3 +--
> 5 files changed, 33 insertions(+), 14 deletions(-)
>
> diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
> index fc9784544b24..7389df326edd 100644
> --- a/fs/proc/task_mmu.c
> +++ b/fs/proc/task_mmu.c
> @@ -832,7 +832,7 @@ static int show_smap(struct seq_file *m, void *v)
> __show_smap(m, &mss, false);
>
> seq_printf(m, "THPeligible: %d\n",
> - transparent_hugepage_enabled(vma));
> + transparent_hugepage_active(vma));
>
> if (arch_pkeys_enabled())
> seq_printf(m, "ProtectionKey: %8u\n", vma_pkey(vma));
> diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
> index 0a526f211fec..a35c13d1f487 100644
> --- a/include/linux/huge_mm.h
> +++ b/include/linux/huge_mm.h
> @@ -115,9 +115,19 @@ extern struct kobj_attribute shmem_enabled_attr;
>
> extern unsigned long transparent_hugepage_flags;
>
> +static inline bool transhuge_vma_enabled(struct vm_area_struct *vma,
I'd like to have this function defined next to transhuge_vma_suitable().
> + unsigned long vm_flags)
> +{
> + /* Explicitly disabled through madvise. */
> + if ((vm_flags & VM_NOHUGEPAGE) ||
> + test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags))
> + return false;
> + return true;
> +}
> +
> /*
> * to be used on vmas which are known to support THP.
> - * Use transparent_hugepage_enabled otherwise
> + * Use transparent_hugepage_active otherwise
> */
> static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma)
> {
> @@ -128,15 +138,12 @@ static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma)
> if (transparent_hugepage_flags & (1 << TRANSPARENT_HUGEPAGE_NEVER_DAX))
> return false;
>
> - if (vma->vm_flags & VM_NOHUGEPAGE)
> + if (!transhuge_vma_enabled(vma, vma->vm_flags))
> return false;
>
> if (vma_is_temporary_stack(vma))
> return false;
>
> - if (test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags))
> - return false;
> -
> if (transparent_hugepage_flags & (1 << TRANSPARENT_HUGEPAGE_FLAG))
> return true;
>
> @@ -150,7 +157,7 @@ static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma)
> return false;
> }
>
> -bool transparent_hugepage_enabled(struct vm_area_struct *vma);
> +bool transparent_hugepage_active(struct vm_area_struct *vma);
>
> static inline bool transhuge_vma_suitable(struct vm_area_struct *vma,
> unsigned long haddr)
> @@ -351,7 +358,7 @@ static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma)
> return false;
> }
>
> -static inline bool transparent_hugepage_enabled(struct vm_area_struct *vma)
> +static inline bool transparent_hugepage_active(struct vm_area_struct *vma)
> {
> return false;
> }
> @@ -362,6 +369,12 @@ static inline bool transhuge_vma_suitable(struct vm_area_struct *vma,
> return false;
> }
>
> +static inline bool transhuge_vma_enabled(struct vm_area_struct *vma,
> + unsigned long vm_flags)
> +{
> + return false;
> +}
> +
> static inline void prep_transhuge_page(struct page *page) {}
>
> static inline bool is_transparent_hugepage(struct page *page)
> diff --git a/mm/huge_memory.c b/mm/huge_memory.c
> index 76ca1eb2a223..4f37867eed12 100644
> --- a/mm/huge_memory.c
> +++ b/mm/huge_memory.c
> @@ -63,7 +63,14 @@ static struct shrinker deferred_split_shrinker;
> static atomic_t huge_zero_refcount;
> struct page *huge_zero_page __read_mostly;
>
> -bool transparent_hugepage_enabled(struct vm_area_struct *vma)
> +static inline bool file_thp_enabled(struct vm_area_struct *vma)
> +{
> + return transhuge_vma_enabled(vma, vma->vm_flags) && vma->vm_file &&
> + !inode_is_open_for_write(vma->vm_file->f_inode) &&
> + (vma->vm_flags & VM_EXEC);
> +}
> +
> +bool transparent_hugepage_active(struct vm_area_struct *vma)
> {
> /* The addr is used to check if the vma size fits */
> unsigned long addr = (vma->vm_end & HPAGE_PMD_MASK) - HPAGE_PMD_SIZE;
> @@ -74,6 +81,8 @@ bool transparent_hugepage_enabled(struct vm_area_struct *vma)
> return __transparent_hugepage_enabled(vma);
> if (vma_is_shmem(vma))
> return shmem_huge_enabled(vma);
> + if (IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS))
> + return file_thp_enabled(vma);
>
> return false;
> }
> diff --git a/mm/khugepaged.c b/mm/khugepaged.c
> index 6c0185fdd815..d97b20fad6e8 100644
> --- a/mm/khugepaged.c
> +++ b/mm/khugepaged.c
> @@ -442,9 +442,7 @@ static inline int khugepaged_test_exit(struct mm_struct *mm)
> static bool hugepage_vma_check(struct vm_area_struct *vma,
> unsigned long vm_flags)
> {
> - /* Explicitly disabled through madvise. */
> - if ((vm_flags & VM_NOHUGEPAGE) ||
> - test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags))
> + if (!transhuge_vma_enabled(vma, vm_flags))
> return false;
>
> /* Enabled via shmem mount options or sysfs settings. */
> diff --git a/mm/shmem.c b/mm/shmem.c
> index a08cedefbfaa..1dcbec313c70 100644
> --- a/mm/shmem.c
> +++ b/mm/shmem.c
> @@ -4032,8 +4032,7 @@ bool shmem_huge_enabled(struct vm_area_struct *vma)
> loff_t i_size;
> pgoff_t off;
>
> - if ((vma->vm_flags & VM_NOHUGEPAGE) ||
> - test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags))
> + if (!transhuge_vma_enabled(vma, vma->vm_flags))
> return false;
> if (shmem_huge == SHMEM_HUGE_FORCE)
> return true;
> --
> 2.23.0
>
>
On 2021/5/14 5:30, Yang Shi wrote:
> On Tue, May 11, 2021 at 6:49 AM Miaohe Lin <[email protected]> wrote:
>>
>> Since commit 99cb0dbd47a1 ("mm,thp: add read-only THP support for
>> (non-shmem) FS"), read-only THP file mapping is supported. But it
>> forgot to add checking for it in transparent_hugepage_enabled().
>> To fix it, we add checking for read-only THP file mapping and also
>> introduce helper transhuge_vma_enabled() to check whether thp is
>> enabled for specified vma to reduce duplicated code. We rename
>> transparent_hugepage_enabled to transparent_hugepage_active to make
>> the code easier to follow as suggested by David Hildenbrand.
>>
>> Fixes: 99cb0dbd47a1 ("mm,thp: add read-only THP support for (non-shmem) FS")
>> Signed-off-by: Miaohe Lin <[email protected]>
>
> Looks correct to me. Reviewed-by: Yang Shi <[email protected]>
>
Many thanks for your Reviewed-by tag.
> Just a nit below:
>
>> ---
>> fs/proc/task_mmu.c | 2 +-
>> include/linux/huge_mm.h | 27 ++++++++++++++++++++-------
>> mm/huge_memory.c | 11 ++++++++++-
>> mm/khugepaged.c | 4 +---
>> mm/shmem.c | 3 +--
>> 5 files changed, 33 insertions(+), 14 deletions(-)
>>
>> diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
>> index fc9784544b24..7389df326edd 100644
>> --- a/fs/proc/task_mmu.c
>> +++ b/fs/proc/task_mmu.c
>> @@ -832,7 +832,7 @@ static int show_smap(struct seq_file *m, void *v)
>> __show_smap(m, &mss, false);
>>
>> seq_printf(m, "THPeligible: %d\n",
>> - transparent_hugepage_enabled(vma));
>> + transparent_hugepage_active(vma));
>>
>> if (arch_pkeys_enabled())
>> seq_printf(m, "ProtectionKey: %8u\n", vma_pkey(vma));
>> diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
>> index 0a526f211fec..a35c13d1f487 100644
>> --- a/include/linux/huge_mm.h
>> +++ b/include/linux/huge_mm.h
>> @@ -115,9 +115,19 @@ extern struct kobj_attribute shmem_enabled_attr;
>>
>> extern unsigned long transparent_hugepage_flags;
>>
>> +static inline bool transhuge_vma_enabled(struct vm_area_struct *vma,
>
> I'd like to have this function defined next to transhuge_vma_suitable().
>
Sounds reasonable. Will do. Thanks!
>> + unsigned long vm_flags)
>> +{
>> + /* Explicitly disabled through madvise. */
>> + if ((vm_flags & VM_NOHUGEPAGE) ||
>> + test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags))
>> + return false;
>> + return true;
>> +}
>> +
>> /*
>> * to be used on vmas which are known to support THP.
>> - * Use transparent_hugepage_enabled otherwise
>> + * Use transparent_hugepage_active otherwise
>> */
>> static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma)
>> {
>> @@ -128,15 +138,12 @@ static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma)
>> if (transparent_hugepage_flags & (1 << TRANSPARENT_HUGEPAGE_NEVER_DAX))
>> return false;
>>
>> - if (vma->vm_flags & VM_NOHUGEPAGE)
>> + if (!transhuge_vma_enabled(vma, vma->vm_flags))
>> return false;
>>
>> if (vma_is_temporary_stack(vma))
>> return false;
>>
>> - if (test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags))
>> - return false;
>> -
>> if (transparent_hugepage_flags & (1 << TRANSPARENT_HUGEPAGE_FLAG))
>> return true;
>>
>> @@ -150,7 +157,7 @@ static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma)
>> return false;
>> }
>>
>> -bool transparent_hugepage_enabled(struct vm_area_struct *vma);
>> +bool transparent_hugepage_active(struct vm_area_struct *vma);
>>
>> static inline bool transhuge_vma_suitable(struct vm_area_struct *vma,
>> unsigned long haddr)
>> @@ -351,7 +358,7 @@ static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma)
>> return false;
>> }
>>
>> -static inline bool transparent_hugepage_enabled(struct vm_area_struct *vma)
>> +static inline bool transparent_hugepage_active(struct vm_area_struct *vma)
>> {
>> return false;
>> }
>> @@ -362,6 +369,12 @@ static inline bool transhuge_vma_suitable(struct vm_area_struct *vma,
>> return false;
>> }
>>
>> +static inline bool transhuge_vma_enabled(struct vm_area_struct *vma,
>> + unsigned long vm_flags)
>> +{
>> + return false;
>> +}
>> +
>> static inline void prep_transhuge_page(struct page *page) {}
>>
>> static inline bool is_transparent_hugepage(struct page *page)
>> diff --git a/mm/huge_memory.c b/mm/huge_memory.c
>> index 76ca1eb2a223..4f37867eed12 100644
>> --- a/mm/huge_memory.c
>> +++ b/mm/huge_memory.c
>> @@ -63,7 +63,14 @@ static struct shrinker deferred_split_shrinker;
>> static atomic_t huge_zero_refcount;
>> struct page *huge_zero_page __read_mostly;
>>
>> -bool transparent_hugepage_enabled(struct vm_area_struct *vma)
>> +static inline bool file_thp_enabled(struct vm_area_struct *vma)
>> +{
>> + return transhuge_vma_enabled(vma, vma->vm_flags) && vma->vm_file &&
>> + !inode_is_open_for_write(vma->vm_file->f_inode) &&
>> + (vma->vm_flags & VM_EXEC);
>> +}
>> +
>> +bool transparent_hugepage_active(struct vm_area_struct *vma)
>> {
>> /* The addr is used to check if the vma size fits */
>> unsigned long addr = (vma->vm_end & HPAGE_PMD_MASK) - HPAGE_PMD_SIZE;
>> @@ -74,6 +81,8 @@ bool transparent_hugepage_enabled(struct vm_area_struct *vma)
>> return __transparent_hugepage_enabled(vma);
>> if (vma_is_shmem(vma))
>> return shmem_huge_enabled(vma);
>> + if (IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS))
>> + return file_thp_enabled(vma);
>>
>> return false;
>> }
>> diff --git a/mm/khugepaged.c b/mm/khugepaged.c
>> index 6c0185fdd815..d97b20fad6e8 100644
>> --- a/mm/khugepaged.c
>> +++ b/mm/khugepaged.c
>> @@ -442,9 +442,7 @@ static inline int khugepaged_test_exit(struct mm_struct *mm)
>> static bool hugepage_vma_check(struct vm_area_struct *vma,
>> unsigned long vm_flags)
>> {
>> - /* Explicitly disabled through madvise. */
>> - if ((vm_flags & VM_NOHUGEPAGE) ||
>> - test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags))
>> + if (!transhuge_vma_enabled(vma, vm_flags))
>> return false;
>>
>> /* Enabled via shmem mount options or sysfs settings. */
>> diff --git a/mm/shmem.c b/mm/shmem.c
>> index a08cedefbfaa..1dcbec313c70 100644
>> --- a/mm/shmem.c
>> +++ b/mm/shmem.c
>> @@ -4032,8 +4032,7 @@ bool shmem_huge_enabled(struct vm_area_struct *vma)
>> loff_t i_size;
>> pgoff_t off;
>>
>> - if ((vma->vm_flags & VM_NOHUGEPAGE) ||
>> - test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags))
>> + if (!transhuge_vma_enabled(vma, vma->vm_flags))
>> return false;
>> if (shmem_huge == SHMEM_HUGE_FORCE)
>> return true;
>> --
>> 2.23.0
>>
>>
> .
>