The quilt patch titled
Subject: mm: mprotect: use a folio in change_pte_range()
has been removed from the -mm tree. Its filename was
mm-mprotect-use-a-folio-in-change_pte_range.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Subject: mm: mprotect: use a folio in change_pte_range()
Date: Wed, 18 Oct 2023 22:07:56 +0800
Use a folio in change_pte_range() to save three compound_head() calls.
Since now only normal and PMD-mapped page is handled by numa balancing,
it is enough to only update the entire folio's access time.
Link: https://lkml.kernel.org/r/20231018140806.2783514-10-wangkefeng.wang@xxxxxxxxxx
Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Huang Ying <ying.huang@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Juri Lelli <juri.lelli@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Vincent Guittot <vincent.guittot@xxxxxxxxxx>
Cc: Zi Yan <ziy@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mprotect.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
--- a/mm/mprotect.c~mm-mprotect-use-a-folio-in-change_pte_range
+++ a/mm/mprotect.c
@@ -114,7 +114,7 @@ static long change_pte_range(struct mmu_
* pages. See similar comment in change_huge_pmd.
*/
if (prot_numa) {
- struct page *page;
+ struct folio *folio;
int nid;
bool toptier;
@@ -122,13 +122,14 @@ static long change_pte_range(struct mmu_
if (pte_protnone(oldpte))
continue;
- page = vm_normal_page(vma, addr, oldpte);
- if (!page || is_zone_device_page(page) || PageKsm(page))
+ folio = vm_normal_folio(vma, addr, oldpte);
+ if (!folio || folio_is_zone_device(folio) ||
+ folio_test_ksm(folio))
continue;
/* Also skip shared copy-on-write pages */
if (is_cow_mapping(vma->vm_flags) &&
- page_count(page) != 1)
+ folio_ref_count(folio) != 1)
continue;
/*
@@ -136,14 +137,15 @@ static long change_pte_range(struct mmu_
* it cannot move them all from MIGRATE_ASYNC
* context.
*/
- if (page_is_file_lru(page) && PageDirty(page))
+ if (folio_is_file_lru(folio) &&
+ folio_test_dirty(folio))
continue;
/*
* Don't mess with PTEs if page is already on the node
* a single-threaded process is running on.
*/
- nid = page_to_nid(page);
+ nid = folio_nid(folio);
if (target_node == nid)
continue;
toptier = node_is_toptier(nid);
@@ -157,7 +159,7 @@ static long change_pte_range(struct mmu_
continue;
if (sysctl_numa_balancing_mode & NUMA_BALANCING_MEMORY_TIERING &&
!toptier)
- xchg_page_access_time(page,
+ folio_xchg_access_time(folio,
jiffies_to_msecs(jiffies));
}
_
Patches currently in -mm which might be from wangkefeng.wang@xxxxxxxxxx are
