linux-kernel - [PATCH 01/18] mm: add mm_counter_folio() and mm_counter_file

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Message-ID: <20231103140119.2306578-2-wangkefeng.wang@huawei.com>
Date:   Fri, 3 Nov 2023 22:01:02 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
        Matthew Wilcox <willy@...radead.org>,
        David Hildenbrand <david@...hat.com>,
        <linux-s390@...r.kernel.org>,
        Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH 01/18] mm: add mm_counter_folio() and mm_counter_file_folio()

Introduce two mm counter folio functions mm_counter_folio() and
mm_counter_file_folio(), will be used folio conversion, and it
saves a compound_head() in mm_counter().

Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
 include/linux/mm.h | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index caf13e94260e..f5f76504b212 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2583,19 +2583,29 @@ static inline void dec_mm_counter(struct mm_struct *mm, int member)
 	mm_trace_rss_stat(mm, member);
 }
 
-/* Optimized variant when page is already known not to be PageAnon */
-static inline int mm_counter_file(struct page *page)
+static inline int mm_counter_file_folio(struct folio *folio)
 {
-	if (PageSwapBacked(page))
+	if (folio_test_swapbacked(folio))
 		return MM_SHMEMPAGES;
 	return MM_FILEPAGES;
 }
 
-static inline int mm_counter(struct page *page)
+/* Optimized variant when page is already known not to be PageAnon */
+static inline int mm_counter_file(struct page *page)
+{
+	return mm_counter_file_folio(page_folio(page));
+}
+
+static inline int mm_counter_folio(struct folio *folio)
 {
-	if (PageAnon(page))
+	if (folio_test_anon(folio))
 		return MM_ANONPAGES;
-	return mm_counter_file(page);
+	return mm_counter_file_folio(folio);
+}
+
+static inline int mm_counter(struct page *page)
+{
+	return mm_counter_folio(page_folio(page));
 }
 
 static inline unsigned long get_mm_rss(struct mm_struct *mm)
-- 
2.27.0