linux-kernel - [PATCH v2 03/12] mm: memcontrol: convert NR_FILE

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Date:   Sun,  6 Dec 2020 16:23:02 +0800
From:   Muchun Song <songmuchun@...edance.com>
To:     gregkh@...uxfoundation.org, rafael@...nel.org, adobriyan@...il.com,
        akpm@...ux-foundation.org, hannes@...xchg.org, mhocko@...nel.org,
        vdavydov.dev@...il.com, hughd@...gle.com, will@...nel.org,
        guro@...com, rppt@...nel.org, tglx@...utronix.de, esyr@...hat.com,
        peterx@...hat.com, krisman@...labora.com, surenb@...gle.com,
        avagin@...nvz.org, elver@...gle.com, rdunlap@...radead.org,
        iamjoonsoo.kim@....com
Cc:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org, cgroups@...r.kernel.org,
        Muchun Song <songmuchun@...edance.com>
Subject: [PATCH v2 03/12] mm: memcontrol: convert NR_FILE_THPS account to pages

Converrt NR_FILE_THPS account to pages.

Signed-off-by: Muchun Song <songmuchun@...edance.com>
---
 drivers/base/node.c | 3 +--
 fs/proc/meminfo.c   | 2 +-
 mm/filemap.c        | 2 +-
 mm/huge_memory.c    | 3 ++-
 mm/khugepaged.c     | 2 +-
 mm/memcontrol.c     | 5 ++---
 6 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/drivers/base/node.c b/drivers/base/node.c
index 7ebe4c2f64d1..2db28acdaa4f 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -466,8 +466,7 @@ static ssize_t node_read_meminfo(struct device *dev,
 				    HPAGE_PMD_NR),
 			     nid, K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED) *
 				    HPAGE_PMD_NR),
-			     nid, K(node_page_state(pgdat, NR_FILE_THPS) *
-				    HPAGE_PMD_NR),
+			     nid, K(node_page_state(pgdat, NR_FILE_THPS)),
 			     nid, K(node_page_state(pgdat, NR_FILE_PMDMAPPED) *
 				    HPAGE_PMD_NR)
 #endif
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index 1f7e1945c313..f4157f26cbf5 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -135,7 +135,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
 	show_val_kb(m, "ShmemPmdMapped: ",
 		    global_node_page_state(NR_SHMEM_PMDMAPPED) * HPAGE_PMD_NR);
 	show_val_kb(m, "FileHugePages:  ",
-		    global_node_page_state(NR_FILE_THPS) * HPAGE_PMD_NR);
+		    global_node_page_state(NR_FILE_THPS));
 	show_val_kb(m, "FilePmdMapped:  ",
 		    global_node_page_state(NR_FILE_PMDMAPPED) * HPAGE_PMD_NR);
 #endif
diff --git a/mm/filemap.c b/mm/filemap.c
index 28e7309c29c8..c4dcb1144883 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -206,7 +206,7 @@ static void unaccount_page_cache_page(struct address_space *mapping,
 		if (PageTransHuge(page))
 			__dec_lruvec_page_state(page, NR_SHMEM_THPS);
 	} else if (PageTransHuge(page)) {
-		__dec_lruvec_page_state(page, NR_FILE_THPS);
+		__mod_lruvec_page_state(page, NR_FILE_THPS, -HPAGE_PMD_NR);
 		filemap_nr_thps_dec(mapping);
 	}
 
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 1a13e1dab3ec..37840bdeaad0 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2748,7 +2748,8 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
 			if (PageSwapBacked(head))
 				__dec_lruvec_page_state(head, NR_SHMEM_THPS);
 			else
-				__dec_lruvec_page_state(head, NR_FILE_THPS);
+				__mod_lruvec_page_state(head, NR_FILE_THPS,
+							-HPAGE_PMD_NR);
 		}
 
 		__split_huge_page(page, list, end);
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index ad316d2e1fee..1e1ced2208d0 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -1859,7 +1859,7 @@ static void collapse_file(struct mm_struct *mm,
 	if (is_shmem)
 		__inc_lruvec_page_state(new_page, NR_SHMEM_THPS);
 	else {
-		__inc_lruvec_page_state(new_page, NR_FILE_THPS);
+		__mod_lruvec_page_state(new_page, NR_FILE_THPS, HPAGE_PMD_NR);
 		filemap_nr_thps_inc(mapping);
 	}
 
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 2700c1db5a1a..c4557de2b211 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1514,7 +1514,7 @@ static struct memory_stat memory_stats[] = {
 	 * constant(e.g. powerpc).
 	 */
 	{ "anon_thp", PAGE_SIZE, NR_ANON_THPS },
-	{ "file_thp", 0, NR_FILE_THPS },
+	{ "file_thp", PAGE_SIZE, NR_FILE_THPS },
 	{ "shmem_thp", 0, NR_SHMEM_THPS },
 #endif
 	{ "inactive_anon", PAGE_SIZE, NR_INACTIVE_ANON },
@@ -1546,8 +1546,7 @@ static int __init memory_stats_init(void)
 
 	for (i = 0; i < ARRAY_SIZE(memory_stats); i++) {
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
-		if (memory_stats[i].idx == NR_FILE_THPS ||
-		    memory_stats[i].idx == NR_SHMEM_THPS)
+		if (memory_stats[i].idx == NR_SHMEM_THPS)
 			memory_stats[i].ratio = HPAGE_PMD_SIZE;
 #endif
 		VM_BUG_ON(!memory_stats[i].ratio);
-- 
2.11.0