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mm/vmscan: Turn page_check_references() into folio_check_references() 

This function only has one caller, and it already has a folio.  This
removes a number of calls to compound_head().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2022-02-15 13:44:40 -05:00
parent c79b7b96db
commit d92013d1e5
1 changed files with 16 additions and 17 deletions
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33
mm/vmscan.c
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@ -1383,55 +1383,54 @@ enum page_references {
PAGEREF_ACTIVATE,
};
static enum page_references page_check_references(struct page *page,
static enum page_references folio_check_references(struct folio *folio,
struct scan_control *sc)
{
struct folio *folio = page_folio(page);
int referenced_ptes, referenced_page;
int referenced_ptes, referenced_folio;
unsigned long vm_flags;
referenced_ptes = folio_referenced(folio, 1, sc->target_mem_cgroup,
&vm_flags);
referenced_page = TestClearPageReferenced(page);
referenced_folio = folio_test_clear_referenced(folio);
/*
* The supposedly reclaimable page was found to be in a VM_LOCKED vma.
* Let the page, now marked Mlocked, be moved to the unevictable list.
* The supposedly reclaimable folio was found to be in a VM_LOCKED vma.
* Let the folio, now marked Mlocked, be moved to the unevictable list.
*/
if (vm_flags & VM_LOCKED)
return PAGEREF_ACTIVATE;
if (referenced_ptes) {
/*
* All mapped pages start out with page table
* All mapped folios start out with page table
* references from the instantiating fault, so we need
* to look twice if a mapped file page is used more
* to look twice if a mapped file folio is used more
* than once.
*
* Mark it and spare it for another trip around the
* inactive list. Another page table reference will
* lead to its activation.
*
* Note: the mark is set for activated pages as well
* so that recently deactivated but used pages are
* Note: the mark is set for activated folios as well
* so that recently deactivated but used folios are
* quickly recovered.
*/
SetPageReferenced(page);
folio_set_referenced(folio);
if (referenced_page || referenced_ptes > 1)
if (referenced_folio || referenced_ptes > 1)
return PAGEREF_ACTIVATE;
/*
* Activate file-backed executable pages after first usage.
* Activate file-backed executable folios after first usage.
*/
if ((vm_flags & VM_EXEC) && !PageSwapBacked(page))
if ((vm_flags & VM_EXEC) && !folio_test_swapbacked(folio))
return PAGEREF_ACTIVATE;
return PAGEREF_KEEP;
}
/* Reclaim if clean, defer dirty pages to writeback */
if (referenced_page && !PageSwapBacked(page))
/* Reclaim if clean, defer dirty folios to writeback */
if (referenced_folio && !folio_test_swapbacked(folio))
return PAGEREF_RECLAIM_CLEAN;
return PAGEREF_RECLAIM;
@ -1671,7 +1670,7 @@ retry:
}
if (!ignore_references)
references = page_check_references(page, sc);
references = folio_check_references(folio, sc);
switch (references) {
case PAGEREF_ACTIVATE: