linux-kernel - [PATCH mm-unstable v3 3/6] mm/mempolicy: Convert queue_pages_pte_range() to queue_folios_pte

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Date:   Wed, 25 Jan 2023 15:41:31 -0800
From:   "Vishal Moola (Oracle)" <vishal.moola@...il.com>
To:     linux-mm@...ck.org
Cc:     akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        "Vishal Moola (Oracle)" <vishal.moola@...il.com>
Subject: [PATCH mm-unstable v3 3/6] mm/mempolicy: Convert queue_pages_pte_range() to queue_folios_pte_range()

This function now operates on folios associated with ptes instead of
pages.

This change is in preparation for the conversion of
queue_pages_required() to queue_folio_required() and migrate_page_add()
to migrate_folio_add().

Signed-off-by: Vishal Moola (Oracle) <vishal.moola@...il.com>
---
 mm/mempolicy.c | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 00fffa93adae..ae9d16124f45 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -491,19 +491,19 @@ static int queue_folios_pmd(pmd_t *pmd, spinlock_t *ptl, unsigned long addr,
  * Scan through pages checking if pages follow certain conditions,
  * and move them to the pagelist if they do.
  *
- * queue_pages_pte_range() has three possible return values:
- * 0 - pages are placed on the right node or queued successfully, or
+ * queue_folios_pte_range() has three possible return values:
+ * 0 - folios are placed on the right node or queued successfully, or
  *     special page is met, i.e. zero page.
- * 1 - there is unmovable page, and MPOL_MF_MOVE* & MPOL_MF_STRICT were
+ * 1 - there is unmovable folio, and MPOL_MF_MOVE* & MPOL_MF_STRICT were
  *     specified.
- * -EIO - only MPOL_MF_STRICT was specified and an existing page was already
+ * -EIO - only MPOL_MF_STRICT was specified and an existing folio was already
  *        on a node that does not follow the policy.
  */
-static int queue_pages_pte_range(pmd_t *pmd, unsigned long addr,
+static int queue_folios_pte_range(pmd_t *pmd, unsigned long addr,
 			unsigned long end, struct mm_walk *walk)
 {
 	struct vm_area_struct *vma = walk->vma;
-	struct page *page;
+	struct folio *folio;
 	struct queue_pages *qp = walk->private;
 	unsigned long flags = qp->flags;
 	bool has_unmovable = false;
@@ -521,16 +521,16 @@ static int queue_pages_pte_range(pmd_t *pmd, unsigned long addr,
 	for (; addr != end; pte++, addr += PAGE_SIZE) {
 		if (!pte_present(*pte))
 			continue;
-		page = vm_normal_page(vma, addr, *pte);
-		if (!page || is_zone_device_page(page))
+		folio = vm_normal_folio(vma, addr, *pte);
+		if (!folio || folio_is_zone_device(folio))
 			continue;
 		/*
-		 * vm_normal_page() filters out zero pages, but there might
-		 * still be PageReserved pages to skip, perhaps in a VDSO.
+		 * vm_normal_folio() filters out zero pages, but there might
+		 * still be reserved folios to skip, perhaps in a VDSO.
 		 */
-		if (PageReserved(page))
+		if (folio_test_reserved(folio))
 			continue;
-		if (!queue_pages_required(page, qp))
+		if (!queue_pages_required(&folio->page, qp))
 			continue;
 		if (flags & (MPOL_MF_MOVE | MPOL_MF_MOVE_ALL)) {
 			/* MPOL_MF_STRICT must be specified if we get here */
@@ -544,7 +544,7 @@ static int queue_pages_pte_range(pmd_t *pmd, unsigned long addr,
 			 * temporary off LRU pages in the range.  Still
 			 * need migrate other LRU pages.
 			 */
-			if (migrate_page_add(page, qp->pagelist, flags))
+			if (migrate_page_add(&folio->page, qp->pagelist, flags))
 				has_unmovable = true;
 		} else
 			break;
@@ -703,7 +703,7 @@ static int queue_pages_test_walk(unsigned long start, unsigned long end,
 
 static const struct mm_walk_ops queue_pages_walk_ops = {
 	.hugetlb_entry		= queue_pages_hugetlb,
-	.pmd_entry		= queue_pages_pte_range,
+	.pmd_entry		= queue_folios_pte_range,
 	.test_walk		= queue_pages_test_walk,
 };
 
-- 
2.38.1