[v2] transfer page to folio in KSM

[PATCH v3 13/14] mm/ksm: use folio_set_stable_node in try_to_merge_one_page

Posted by alexs@kernel.org 1 year, 10 months ago

From: "Alex Shi (tencent)" <alexs@kernel.org>

Only single page could be reached where we set stable node after write
protect, so use folio converted func to replace page's.

Signed-off-by: Alex Shi (tencent) <alexs@kernel.org>
Cc: Izik Eidus <izik.eidus@ravellosystems.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Chris Wright <chrisw@sous-sol.org>
---
 mm/ksm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/ksm.c b/mm/ksm.c
index 15a78a9bab59..d7c4cc4a0cc1 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -1518,7 +1518,7 @@ static int try_to_merge_one_page(struct vm_area_struct *vma,
 			 * PageAnon+anon_vma to PageKsm+NULL stable_node:
 			 * stable_tree_insert() will update stable_node.
 			 */
-			set_page_stable_node(page, NULL);
+			folio_set_stable_node(page_folio(page), NULL);
 			mark_page_accessed(page);
 			/*
 			 * Page reclaim just frees a clean page with no dirty
-- 
2.43.0

Re: [PATCH v3 13/14] mm/ksm: use folio_set_stable_node in try_to_merge_one_page

Posted by David Hildenbrand 1 year, 10 months ago

On 25.03.24 13:49, alexs@kernel.org wrote:
> From: "Alex Shi (tencent)" <alexs@kernel.org>
> 
> Only single page could be reached where we set stable node after write
> protect, so use folio converted func to replace page's.
> 
> Signed-off-by: Alex Shi (tencent) <alexs@kernel.org>
> Cc: Izik Eidus <izik.eidus@ravellosystems.com>
> Cc: Matthew Wilcox <willy@infradead.org>
> Cc: Andrea Arcangeli <aarcange@redhat.com>
> Cc: Hugh Dickins <hughd@google.com>
> Cc: Chris Wright <chrisw@sous-sol.org>
> ---
>   mm/ksm.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/ksm.c b/mm/ksm.c
> index 15a78a9bab59..d7c4cc4a0cc1 100644
> --- a/mm/ksm.c
> +++ b/mm/ksm.c
> @@ -1518,7 +1518,7 @@ static int try_to_merge_one_page(struct vm_area_struct *vma,
>   			 * PageAnon+anon_vma to PageKsm+NULL stable_node:
>   			 * stable_tree_insert() will update stable_node.
>   			 */
> -			set_page_stable_node(page, NULL);
> +			folio_set_stable_node(page_folio(page), NULL);
>   			mark_page_accessed(page);
>   			/*
>   			 * Page reclaim just frees a clean page with no dirty

Reviewed-by: David Hildenbrand <david@redhat.com>

-- 
Cheers,

David / dhildenb