khugepaged: Refactor trace_mm_collapse_huge_page_isolate() to take folio instead of page

[PATCH] khugepaged: Refactor trace_mm_collapse_huge_page_isolate() to take folio instead of page

Posted by nifan.cxl@gmail.com 9 months, 3 weeks ago

From: Fan Ni <fan.ni@samsung.com>

trace_mm_collapse_huge_page_isolate() is only used in
__collapse_huge_page_isolate(), which passes in the head page of a
folio, so refactor it to take folio directly.

Signed-off-by: Fan Ni <fan.ni@samsung.com>
---
 include/trace/events/huge_memory.h | 6 +++---
 mm/khugepaged.c                    | 4 ++--
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/include/trace/events/huge_memory.h b/include/trace/events/huge_memory.h
index 9d5c00b0285c..a73699f000de 100644
--- a/include/trace/events/huge_memory.h
+++ b/include/trace/events/huge_memory.h
@@ -116,10 +116,10 @@ TRACE_EVENT(mm_collapse_huge_page,
 
 TRACE_EVENT(mm_collapse_huge_page_isolate,
 
-	TP_PROTO(struct page *page, int none_or_zero,
+	TP_PROTO(struct folio *folio, int none_or_zero,
 		 int referenced, bool  writable, int status),
 
-	TP_ARGS(page, none_or_zero, referenced, writable, status),
+	TP_ARGS(folio, none_or_zero, referenced, writable, status),
 
 	TP_STRUCT__entry(
 		__field(unsigned long, pfn)
@@ -130,7 +130,7 @@ TRACE_EVENT(mm_collapse_huge_page_isolate,
 	),
 
 	TP_fast_assign(
-		__entry->pfn = page ? page_to_pfn(page) : -1;
+		__entry->pfn = folio ? folio_pfn(folio) : -1;
 		__entry->none_or_zero = none_or_zero;
 		__entry->referenced = referenced;
 		__entry->writable = writable;
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index b8838ba8207a..950d147cd95e 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -696,13 +696,13 @@ static int __collapse_huge_page_isolate(struct vm_area_struct *vma,
 		result = SCAN_LACK_REFERENCED_PAGE;
 	} else {
 		result = SCAN_SUCCEED;
-		trace_mm_collapse_huge_page_isolate(&folio->page, none_or_zero,
+		trace_mm_collapse_huge_page_isolate(folio, none_or_zero,
 						    referenced, writable, result);
 		return result;
 	}
 out:
 	release_pte_pages(pte, _pte, compound_pagelist);
-	trace_mm_collapse_huge_page_isolate(&folio->page, none_or_zero,
+	trace_mm_collapse_huge_page_isolate(folio, none_or_zero,
 					    referenced, writable, result);
 	return result;
 }
-- 
2.47.2

Re: [PATCH] khugepaged: Refactor trace_mm_collapse_huge_page_isolate() to take folio instead of page

Posted by Davidlohr Bueso 9 months, 3 weeks ago

On Thu, 17 Apr 2025, nifan.cxl@gmail.com wrote:

>From: Fan Ni <fan.ni@samsung.com>
>
>trace_mm_collapse_huge_page_isolate() is only used in
>__collapse_huge_page_isolate(), which passes in the head page of a
>folio, so refactor it to take folio directly.
>
>Signed-off-by: Fan Ni <fan.ni@samsung.com>

Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>

Re: [PATCH] khugepaged: Refactor trace_mm_collapse_huge_page_isolate() to take folio instead of page

Posted by Nico Pache 9 months, 3 weeks ago

On Thu, Apr 17, 2025 at 11:18 AM <nifan.cxl@gmail.com> wrote:
>
> From: Fan Ni <fan.ni@samsung.com>
>
> trace_mm_collapse_huge_page_isolate() is only used in
> __collapse_huge_page_isolate(), which passes in the head page of a
> folio, so refactor it to take folio directly.
>
> Signed-off-by: Fan Ni <fan.ni@samsung.com>
Looks good!

Reviewed-by: Nico Pache <npache@redhat.com>

> ---
>  include/trace/events/huge_memory.h | 6 +++---
>  mm/khugepaged.c                    | 4 ++--
>  2 files changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/include/trace/events/huge_memory.h b/include/trace/events/huge_memory.h
> index 9d5c00b0285c..a73699f000de 100644
> --- a/include/trace/events/huge_memory.h
> +++ b/include/trace/events/huge_memory.h
> @@ -116,10 +116,10 @@ TRACE_EVENT(mm_collapse_huge_page,
>
>  TRACE_EVENT(mm_collapse_huge_page_isolate,
>
> -       TP_PROTO(struct page *page, int none_or_zero,
> +       TP_PROTO(struct folio *folio, int none_or_zero,
>                  int referenced, bool  writable, int status),
>
> -       TP_ARGS(page, none_or_zero, referenced, writable, status),
> +       TP_ARGS(folio, none_or_zero, referenced, writable, status),
>
>         TP_STRUCT__entry(
>                 __field(unsigned long, pfn)
> @@ -130,7 +130,7 @@ TRACE_EVENT(mm_collapse_huge_page_isolate,
>         ),
>
>         TP_fast_assign(
> -               __entry->pfn = page ? page_to_pfn(page) : -1;
> +               __entry->pfn = folio ? folio_pfn(folio) : -1;
>                 __entry->none_or_zero = none_or_zero;
>                 __entry->referenced = referenced;
>                 __entry->writable = writable;
> diff --git a/mm/khugepaged.c b/mm/khugepaged.c
> index b8838ba8207a..950d147cd95e 100644
> --- a/mm/khugepaged.c
> +++ b/mm/khugepaged.c
> @@ -696,13 +696,13 @@ static int __collapse_huge_page_isolate(struct vm_area_struct *vma,
>                 result = SCAN_LACK_REFERENCED_PAGE;
>         } else {
>                 result = SCAN_SUCCEED;
> -               trace_mm_collapse_huge_page_isolate(&folio->page, none_or_zero,
> +               trace_mm_collapse_huge_page_isolate(folio, none_or_zero,
>                                                     referenced, writable, result);
>                 return result;
>         }
>  out:
>         release_pte_pages(pte, _pte, compound_pagelist);
> -       trace_mm_collapse_huge_page_isolate(&folio->page, none_or_zero,
> +       trace_mm_collapse_huge_page_isolate(folio, none_or_zero,
>                                             referenced, writable, result);
>         return result;
>  }
> --
> 2.47.2
>

Re: [PATCH] khugepaged: Refactor trace_mm_collapse_huge_page_isolate() to take folio instead of page

Posted by Baolin Wang 9 months, 3 weeks ago


On 2025/4/18 01:17, nifan.cxl@gmail.com wrote:
> From: Fan Ni <fan.ni@samsung.com>
> 
> trace_mm_collapse_huge_page_isolate() is only used in
> __collapse_huge_page_isolate(), which passes in the head page of a
> folio, so refactor it to take folio directly.
> 
> Signed-off-by: Fan Ni <fan.ni@samsung.com>

LGTM.
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>

> ---
>   include/trace/events/huge_memory.h | 6 +++---
>   mm/khugepaged.c                    | 4 ++--
>   2 files changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/include/trace/events/huge_memory.h b/include/trace/events/huge_memory.h
> index 9d5c00b0285c..a73699f000de 100644
> --- a/include/trace/events/huge_memory.h
> +++ b/include/trace/events/huge_memory.h
> @@ -116,10 +116,10 @@ TRACE_EVENT(mm_collapse_huge_page,
>   
>   TRACE_EVENT(mm_collapse_huge_page_isolate,
>   
> -	TP_PROTO(struct page *page, int none_or_zero,
> +	TP_PROTO(struct folio *folio, int none_or_zero,
>   		 int referenced, bool  writable, int status),
>   
> -	TP_ARGS(page, none_or_zero, referenced, writable, status),
> +	TP_ARGS(folio, none_or_zero, referenced, writable, status),
>   
>   	TP_STRUCT__entry(
>   		__field(unsigned long, pfn)
> @@ -130,7 +130,7 @@ TRACE_EVENT(mm_collapse_huge_page_isolate,
>   	),
>   
>   	TP_fast_assign(
> -		__entry->pfn = page ? page_to_pfn(page) : -1;
> +		__entry->pfn = folio ? folio_pfn(folio) : -1;
>   		__entry->none_or_zero = none_or_zero;
>   		__entry->referenced = referenced;
>   		__entry->writable = writable;
> diff --git a/mm/khugepaged.c b/mm/khugepaged.c
> index b8838ba8207a..950d147cd95e 100644
> --- a/mm/khugepaged.c
> +++ b/mm/khugepaged.c
> @@ -696,13 +696,13 @@ static int __collapse_huge_page_isolate(struct vm_area_struct *vma,
>   		result = SCAN_LACK_REFERENCED_PAGE;
>   	} else {
>   		result = SCAN_SUCCEED;
> -		trace_mm_collapse_huge_page_isolate(&folio->page, none_or_zero,
> +		trace_mm_collapse_huge_page_isolate(folio, none_or_zero,
>   						    referenced, writable, result);
>   		return result;
>   	}
>   out:
>   	release_pte_pages(pte, _pte, compound_pagelist);
> -	trace_mm_collapse_huge_page_isolate(&folio->page, none_or_zero,
> +	trace_mm_collapse_huge_page_isolate(folio, none_or_zero,
>   					    referenced, writable, result);
>   	return result;
>   }