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mm/khugepaged: convert hpage_collapse_scan_pmd() to use folios

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[ Upstream commit 5c07ebb372d66423e508ecfb8e00324f8797f072 ]

Replaces 5 calls to compound_head(), and removes 1385 bytes of kernel
text.

Link: https://lkml.kernel.org/r/20231020183331.10770-3-vishal.moola@gmail.com
Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Reviewed-by: Rik van Riel <riel@surriel.com>
Reviewed-by: Yang Shi <shy828301@gmail.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Stable-dep-of: 394bfac1c7f7 ("mm/khugepaged: fix the address passed to notifier on testing young")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vishal Moola (Oracle)
2025-09-13 14:59:11 -04:00
committed by Greg Kroah-Hartman
parent 394547b911
commit c95c22402b
1 changed files with 10 additions and 10 deletions
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20
mm/khugepaged.c
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@@ -1240,6 +1240,7 @@ 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;
@@ -1326,29 +1327,28 @@ 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;
}
@@ -1363,7 +1363,7 @@ 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->page)) {
result = SCAN_PAGE_COUNT;
goto out_unmap;
}
@@ -1373,8 +1373,8 @@ 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++;
}
@@ -1396,7 +1396,7 @@ 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;
}