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Diffstat (limited to 'mm/khugepaged.c')
-rw-r--r--mm/khugepaged.c137
1 files changed, 68 insertions, 69 deletions
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 88433cc25d8a..bc2d8ff269c7 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -524,15 +524,15 @@ static void release_pte_pages(pte_t *pte, pte_t *_pte,
}
}
-static bool is_refcount_suitable(struct page *page)
+static bool is_refcount_suitable(struct folio *folio)
{
int expected_refcount;
- expected_refcount = total_mapcount(page);
- if (PageSwapCache(page))
- expected_refcount += compound_nr(page);
+ expected_refcount = folio_mapcount(folio);
+ if (folio_test_swapcache(folio))
+ expected_refcount += folio_nr_pages(folio);
- return page_count(page) == expected_refcount;
+ return folio_ref_count(folio) == expected_refcount;
}
static int __collapse_huge_page_isolate(struct vm_area_struct *vma,
@@ -542,6 +542,7 @@ static int __collapse_huge_page_isolate(struct vm_area_struct *vma,
struct list_head *compound_pagelist)
{
struct page *page = NULL;
+ struct folio *folio = NULL;
pte_t *_pte;
int none_or_zero = 0, shared = 0, result = SCAN_FAIL, referenced = 0;
bool writable = false;
@@ -576,7 +577,8 @@ static int __collapse_huge_page_isolate(struct vm_area_struct *vma,
goto out;
}
- VM_BUG_ON_PAGE(!PageAnon(page), page);
+ folio = page_folio(page);
+ VM_BUG_ON_FOLIO(!folio_test_anon(folio), folio);
if (page_mapcount(page) > 1) {
++shared;
@@ -588,16 +590,15 @@ static int __collapse_huge_page_isolate(struct vm_area_struct *vma,
}
}
- if (PageCompound(page)) {
- struct page *p;
- page = compound_head(page);
+ if (folio_test_large(folio)) {
+ struct folio *f;
/*
* Check if we have dealt with the compound page
* already
*/
- list_for_each_entry(p, compound_pagelist, lru) {
- if (page == p)
+ list_for_each_entry(f, compound_pagelist, lru) {
+ if (folio == f)
goto next;
}
}
@@ -608,7 +609,7 @@ static int __collapse_huge_page_isolate(struct vm_area_struct *vma,
* is needed to serialize against split_huge_page
* when invoked from the VM.
*/
- if (!trylock_page(page)) {
+ if (!folio_trylock(folio)) {
result = SCAN_PAGE_LOCK;
goto out;
}
@@ -624,8 +625,8 @@ static int __collapse_huge_page_isolate(struct vm_area_struct *vma,
* but not from this process. The other process cannot write to
* the page, only trigger CoW.
*/
- if (!is_refcount_suitable(page)) {
- unlock_page(page);
+ if (!is_refcount_suitable(folio)) {
+ folio_unlock(folio);
result = SCAN_PAGE_COUNT;
goto out;
}
@@ -634,27 +635,27 @@ static int __collapse_huge_page_isolate(struct vm_area_struct *vma,
* Isolate the page to avoid collapsing an hugepage
* currently in use by the VM.
*/
- if (!isolate_lru_page(page)) {
- unlock_page(page);
+ if (!folio_isolate_lru(folio)) {
+ folio_unlock(folio);
result = SCAN_DEL_PAGE_LRU;
goto out;
}
- mod_node_page_state(page_pgdat(page),
- NR_ISOLATED_ANON + page_is_file_lru(page),
- compound_nr(page));
- VM_BUG_ON_PAGE(!PageLocked(page), page);
- VM_BUG_ON_PAGE(PageLRU(page), page);
+ node_stat_mod_folio(folio,
+ NR_ISOLATED_ANON + folio_is_file_lru(folio),
+ folio_nr_pages(folio));
+ VM_BUG_ON_FOLIO(!folio_test_locked(folio), folio);
+ VM_BUG_ON_FOLIO(folio_test_lru(folio), folio);
- if (PageCompound(page))
- list_add_tail(&page->lru, compound_pagelist);
+ if (folio_test_large(folio))
+ list_add_tail(&folio->lru, compound_pagelist);
next:
/*
* If collapse was initiated by khugepaged, check that there is
* enough young pte to justify collapsing the page
*/
if (cc->is_khugepaged &&
- (pte_young(pteval) || page_is_young(page) ||
- PageReferenced(page) || mmu_notifier_test_young(vma->vm_mm,
+ (pte_young(pteval) || folio_test_young(folio) ||
+ folio_test_referenced(folio) || mmu_notifier_test_young(vma->vm_mm,
address)))
referenced++;
@@ -668,13 +669,13 @@ next:
result = SCAN_LACK_REFERENCED_PAGE;
} else {
result = SCAN_SUCCEED;
- trace_mm_collapse_huge_page_isolate(page, none_or_zero,
+ trace_mm_collapse_huge_page_isolate(&folio->page, none_or_zero,
referenced, writable, result);
return result;
}
out:
release_pte_pages(pte, _pte, compound_pagelist);
- trace_mm_collapse_huge_page_isolate(page, none_or_zero,
+ trace_mm_collapse_huge_page_isolate(&folio->page, none_or_zero,
referenced, writable, result);
return result;
}
@@ -887,16 +888,16 @@ static int hpage_collapse_find_target_node(struct collapse_control *cc)
}
#endif
-static bool hpage_collapse_alloc_page(struct page **hpage, gfp_t gfp, int node,
+static bool hpage_collapse_alloc_folio(struct folio **folio, gfp_t gfp, int node,
nodemask_t *nmask)
{
- *hpage = __alloc_pages(gfp, HPAGE_PMD_ORDER, node, nmask);
- if (unlikely(!*hpage)) {
+ *folio = __folio_alloc(gfp, HPAGE_PMD_ORDER, node, nmask);
+
+ if (unlikely(!*folio)) {
count_vm_event(THP_COLLAPSE_ALLOC_FAILED);
return false;
}
- folio_prep_large_rmappable((struct folio *)*hpage);
count_vm_event(THP_COLLAPSE_ALLOC);
return true;
}
@@ -1063,17 +1064,20 @@ static int alloc_charge_hpage(struct page **hpage, struct mm_struct *mm,
int node = hpage_collapse_find_target_node(cc);
struct folio *folio;
- if (!hpage_collapse_alloc_page(hpage, gfp, node, &cc->alloc_nmask))
+ if (!hpage_collapse_alloc_folio(&folio, gfp, node, &cc->alloc_nmask)) {
+ *hpage = NULL;
return SCAN_ALLOC_HUGE_PAGE_FAIL;
+ }
- folio = page_folio(*hpage);
if (unlikely(mem_cgroup_charge(folio, mm, gfp))) {
folio_put(folio);
*hpage = NULL;
return SCAN_CGROUP_CHARGE_FAIL;
}
- count_memcg_page_event(*hpage, THP_COLLAPSE_ALLOC);
+ count_memcg_folio_events(folio, THP_COLLAPSE_ALLOC, 1);
+
+ *hpage = folio_page(folio, 0);
return SCAN_SUCCEED;
}
@@ -1247,6 +1251,7 @@ static int hpage_collapse_scan_pmd(struct mm_struct *mm,
int result = SCAN_FAIL, referenced = 0;
int none_or_zero = 0, shared = 0;
struct page *page = NULL;
+ struct folio *folio = NULL;
unsigned long _address;
spinlock_t *ptl;
int node = NUMA_NO_NODE, unmapped = 0;
@@ -1333,29 +1338,28 @@ static int hpage_collapse_scan_pmd(struct mm_struct *mm,
}
}
- page = compound_head(page);
-
+ folio = page_folio(page);
/*
* Record which node the original page is from and save this
* information to cc->node_load[].
* Khugepaged will allocate hugepage from the node has the max
* hit record.
*/
- node = page_to_nid(page);
+ node = folio_nid(folio);
if (hpage_collapse_scan_abort(node, cc)) {
result = SCAN_SCAN_ABORT;
goto out_unmap;
}
cc->node_load[node]++;
- if (!PageLRU(page)) {
+ if (!folio_test_lru(folio)) {
result = SCAN_PAGE_LRU;
goto out_unmap;
}
- if (PageLocked(page)) {
+ if (folio_test_locked(folio)) {
result = SCAN_PAGE_LOCK;
goto out_unmap;
}
- if (!PageAnon(page)) {
+ if (!folio_test_anon(folio)) {
result = SCAN_PAGE_ANON;
goto out_unmap;
}
@@ -1370,7 +1374,7 @@ static int hpage_collapse_scan_pmd(struct mm_struct *mm,
* has excessive GUP pins (i.e. 512). Anyway the same check
* will be done again later the risk seems low.
*/
- if (!is_refcount_suitable(page)) {
+ if (!is_refcount_suitable(folio)) {
result = SCAN_PAGE_COUNT;
goto out_unmap;
}
@@ -1380,8 +1384,8 @@ static int hpage_collapse_scan_pmd(struct mm_struct *mm,
* enough young pte to justify collapsing the page
*/
if (cc->is_khugepaged &&
- (pte_young(pteval) || page_is_young(page) ||
- PageReferenced(page) || mmu_notifier_test_young(vma->vm_mm,
+ (pte_young(pteval) || folio_test_young(folio) ||
+ folio_test_referenced(folio) || mmu_notifier_test_young(vma->vm_mm,
address)))
referenced++;
}
@@ -1403,7 +1407,7 @@ out_unmap:
*mmap_locked = false;
}
out:
- trace_mm_khugepaged_scan_pmd(mm, page, writable, referenced,
+ trace_mm_khugepaged_scan_pmd(mm, &folio->page, writable, referenced,
none_or_zero, result, unmapped);
return result;
}
@@ -1473,7 +1477,7 @@ int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,
bool notified = false;
unsigned long haddr = addr & HPAGE_PMD_MASK;
struct vm_area_struct *vma = vma_lookup(mm, haddr);
- struct page *hpage;
+ struct folio *folio;
pte_t *start_pte, *pte;
pmd_t *pmd, pgt_pmd;
spinlock_t *pml = NULL, *ptl;
@@ -1506,19 +1510,14 @@ int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,
if (userfaultfd_wp(vma))
return SCAN_PTE_UFFD_WP;
- hpage = find_lock_page(vma->vm_file->f_mapping,
+ folio = filemap_lock_folio(vma->vm_file->f_mapping,
linear_page_index(vma, haddr));
- if (!hpage)
+ if (IS_ERR(folio))
return SCAN_PAGE_NULL;
- if (!PageHead(hpage)) {
- result = SCAN_FAIL;
- goto drop_hpage;
- }
-
- if (compound_order(hpage) != HPAGE_PMD_ORDER) {
+ if (folio_order(folio) != HPAGE_PMD_ORDER) {
result = SCAN_PAGE_COMPOUND;
- goto drop_hpage;
+ goto drop_folio;
}
result = find_pmd_or_thp_or_none(mm, haddr, &pmd);
@@ -1532,13 +1531,13 @@ int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,
*/
goto maybe_install_pmd;
default:
- goto drop_hpage;
+ goto drop_folio;
}
result = SCAN_FAIL;
start_pte = pte_offset_map_lock(mm, pmd, haddr, &ptl);
if (!start_pte) /* mmap_lock + page lock should prevent this */
- goto drop_hpage;
+ goto drop_folio;
/* step 1: check all mapped PTEs are to the right huge page */
for (i = 0, addr = haddr, pte = start_pte;
@@ -1563,7 +1562,7 @@ int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,
* Note that uprobe, debugger, or MAP_PRIVATE may change the
* page table, but the new page will not be a subpage of hpage.
*/
- if (hpage + i != page)
+ if (folio_page(folio, i) != page)
goto abort;
}
@@ -1578,7 +1577,7 @@ int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,
* page_table_lock) ptl nests inside pml. The less time we hold pml,
* the better; but userfaultfd's mfill_atomic_pte() on a private VMA
* inserts a valid as-if-COWed PTE without even looking up page cache.
- * So page lock of hpage does not protect from it, so we must not drop
+ * So page lock of folio does not protect from it, so we must not drop
* ptl before pgt_pmd is removed, so uffd private needs pml taken now.
*/
if (userfaultfd_armed(vma) && !(vma->vm_flags & VM_SHARED))
@@ -1602,7 +1601,7 @@ int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,
continue;
/*
* We dropped ptl after the first scan, to do the mmu_notifier:
- * page lock stops more PTEs of the hpage being faulted in, but
+ * page lock stops more PTEs of the folio being faulted in, but
* does not stop write faults COWing anon copies from existing
* PTEs; and does not stop those being swapped out or migrated.
*/
@@ -1611,7 +1610,7 @@ int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,
goto abort;
}
page = vm_normal_page(vma, addr, ptent);
- if (hpage + i != page)
+ if (folio_page(folio, i) != page)
goto abort;
/*
@@ -1630,8 +1629,8 @@ int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,
/* step 3: set proper refcount and mm_counters. */
if (nr_ptes) {
- page_ref_sub(hpage, nr_ptes);
- add_mm_counter(mm, mm_counter_file(hpage), -nr_ptes);
+ folio_ref_sub(folio, nr_ptes);
+ add_mm_counter(mm, mm_counter_file(&folio->page), -nr_ptes);
}
/* step 4: remove empty page table */
@@ -1655,14 +1654,14 @@ int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,
maybe_install_pmd:
/* step 5: install pmd entry */
result = install_pmd
- ? set_huge_pmd(vma, haddr, pmd, hpage)
+ ? set_huge_pmd(vma, haddr, pmd, &folio->page)
: SCAN_SUCCEED;
- goto drop_hpage;
+ goto drop_folio;
abort:
if (nr_ptes) {
flush_tlb_mm(mm);
- page_ref_sub(hpage, nr_ptes);
- add_mm_counter(mm, mm_counter_file(hpage), -nr_ptes);
+ folio_ref_sub(folio, nr_ptes);
+ add_mm_counter(mm, mm_counter_file(&folio->page), -nr_ptes);
}
if (start_pte)
pte_unmap_unlock(start_pte, ptl);
@@ -1670,9 +1669,9 @@ abort:
spin_unlock(pml);
if (notified)
mmu_notifier_invalidate_range_end(&range);
-drop_hpage:
- unlock_page(hpage);
- put_page(hpage);
+drop_folio:
+ folio_unlock(folio);
+ folio_put(folio);
return result;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-13 23:04:37 +0000