diff options
| author | Alex Shi (tencent) <alexs@kernel.org> | 2024-04-11 14:17:06 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-05-05 17:53:33 -0700 |
| commit | 6f528de2986e179bf4a100dcc8db2a6703aa7885 (patch) | |
| tree | f76a92c4ecd32c259b054032be20f7cc1740bcdb /mm | |
| parent | 9d5cc14093594f0a5f8318cc70208bbbe71f5fce (diff) | |
mm/ksm: use folio in stable_node_dup
Use ksm_get_folio() and save 2 compound_head calls.
Link: https://lkml.kernel.org/r/20240411061713.1847574-6-alexs@kernel.org
Signed-off-by: Alex Shi (tencent) <alexs@kernel.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/ksm.c | 16 |
1 files changed, 8 insertions, 8 deletions
@@ -1638,7 +1638,7 @@ static struct page *stable_node_dup(struct ksm_stable_node **_stable_node_dup, { struct ksm_stable_node *dup, *found = NULL, *stable_node = *_stable_node; struct hlist_node *hlist_safe; - struct page *_tree_page, *tree_page = NULL; + struct folio *folio, *tree_folio = NULL; int nr = 0; int found_rmap_hlist_len; @@ -1657,24 +1657,24 @@ static struct page *stable_node_dup(struct ksm_stable_node **_stable_node_dup, * We must walk all stable_node_dup to prune the stale * stable nodes during lookup. * - * get_ksm_page can drop the nodes from the + * ksm_get_folio can drop the nodes from the * stable_node->hlist if they point to freed pages * (that's why we do a _safe walk). The "dup" * stable_node parameter itself will be freed from * under us if it returns NULL. */ - _tree_page = get_ksm_page(dup, GET_KSM_PAGE_NOLOCK); - if (!_tree_page) + folio = ksm_get_folio(dup, GET_KSM_PAGE_NOLOCK); + if (!folio) continue; nr += 1; if (is_page_sharing_candidate(dup)) { if (!found || dup->rmap_hlist_len > found_rmap_hlist_len) { if (found) - put_page(tree_page); + folio_put(tree_folio); found = dup; found_rmap_hlist_len = found->rmap_hlist_len; - tree_page = _tree_page; + tree_folio = folio; /* skip put_page for found dup */ if (!prune_stale_stable_nodes) @@ -1682,7 +1682,7 @@ static struct page *stable_node_dup(struct ksm_stable_node **_stable_node_dup, continue; } } - put_page(_tree_page); + folio_put(folio); } if (found) { @@ -1747,7 +1747,7 @@ static struct page *stable_node_dup(struct ksm_stable_node **_stable_node_dup, } *_stable_node_dup = found; - return tree_page; + return &tree_folio->page; } static struct ksm_stable_node *stable_node_dup_any(struct ksm_stable_node *stable_node, |