linux-kernel - [PATCH -next 3/8] mm: huge_memory: convert split_huge_pages

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Date:   Tue, 13 Dec 2022 17:27:30 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Oscar Salvador <osalvador@...e.de>,
        SeongJae Park <sj@...nel.org>
CC:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        <damon@...ts.linux.dev>, <vishal.moola@...il.com>,
        <willy@...radead.org>, Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH -next 3/8] mm: huge_memory: convert split_huge_pages_all() to use folios

Straightforwardly convert split_huge_pages_all() to use folio function.

Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
 mm/huge_memory.c | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index abe6cfd92ffa..02092dd10aa4 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2933,7 +2933,7 @@ static struct shrinker deferred_split_shrinker = {
 static void split_huge_pages_all(void)
 {
 	struct zone *zone;
-	struct page *page;
+	struct folio *folio;
 	unsigned long pfn, max_zone_pfn;
 	unsigned long total = 0, split = 0;
 
@@ -2945,25 +2945,27 @@ static void split_huge_pages_all(void)
 		for (pfn = zone->zone_start_pfn; pfn < max_zone_pfn; pfn++) {
 			int nr_pages;
 
-			page = pfn_to_online_page(pfn);
-			if (!page || !get_page_unless_zero(page))
+			folio = pfn_to_online_folio(pfn);
+			if (!folio || !folio_try_get(folio))
 				continue;
 
-			if (zone != page_zone(page))
+			if (zone != folio_zone(folio))
 				goto next;
 
-			if (!PageHead(page) || PageHuge(page) || !PageLRU(page))
+			if (!folio_test_large(folio)
+				|| folio_test_hugetlb(folio)
+				|| !folio_test_lru(folio))
 				goto next;
 
 			total++;
-			lock_page(page);
-			nr_pages = thp_nr_pages(page);
-			if (!split_huge_page(page))
+			folio_lock(folio);
+			nr_pages = folio_nr_pages(folio);
+			if (!split_folio(folio))
 				split++;
 			pfn += nr_pages - 1;
-			unlock_page(page);
+			folio_unlock(folio);
 next:
-			put_page(page);
+			folio_put(folio);
 			cond_resched();
 		}
 	}
-- 
2.35.3