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Message-ID: <20231013085603.1227349-10-wangkefeng.wang@huawei.com>
Date: Fri, 13 Oct 2023 16:55:53 +0800
From: Kefeng Wang <wangkefeng.wang@...wei.com>
To: Andrew Morton <akpm@...ux-foundation.org>
CC: <willy@...radead.org>, <linux-mm@...ck.org>,
<linux-kernel@...r.kernel.org>, <ying.huang@...el.com>,
<david@...hat.com>, Zi Yan <ziy@...dia.com>,
Ingo Molnar <mingo@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Juri Lelli <juri.lelli@...hat.com>,
Vincent Guittot <vincent.guittot@...aro.org>,
Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH -next v2 09/19] mm: mprotect: use a folio in change_pte_range()
Use a folio in change_pte_range() to save three compound_head() calls.
Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
mm/mprotect.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/mm/mprotect.c b/mm/mprotect.c
index f1dc8f8c84ef..81991102f785 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -114,7 +114,7 @@ static long change_pte_range(struct mmu_gather *tlb,
* 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_gather *tlb,
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_gather *tlb,
* 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_gather *tlb,
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));
}
--
2.27.0
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