linux-kernel - [PATCH 05/23] thp: represent file thp pages in meminfo and friends

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Date:	Sun,  4 Aug 2013 05:17:07 +0300
From:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:	Andrea Arcangeli <aarcange@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Al Viro <viro@...iv.linux.org.uk>, Hugh Dickins <hughd@...gle.com>,
	Wu Fengguang <fengguang.wu@...el.com>, Jan Kara <jack@...e.cz>,
	Mel Gorman <mgorman@...e.de>, linux-mm@...ck.org,
	Andi Kleen <ak@...ux.intel.com>,
	Matthew Wilcox <willy@...ux.intel.com>,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	Hillf Danton <dhillf@...il.com>, Dave Hansen <dave@...1.net>,
	Ning Qu <quning@...gle.com>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCH 05/23] thp: represent file thp pages in meminfo and friends

From: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>

The patch adds new zone stat to count file transparent huge pages and
adjust related places.

For now we don't count mapped or dirty file thp pages separately.

The patch depends on patch
 thp: account anon transparent huge pages into NR_ANON_PAGES

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Acked-by: Dave Hansen <dave.hansen@...ux.intel.com>
---
 drivers/base/node.c    | 4 ++++
 fs/proc/meminfo.c      | 3 +++
 include/linux/mmzone.h | 1 +
 mm/vmstat.c            | 1 +
 4 files changed, 9 insertions(+)

diff --git a/drivers/base/node.c b/drivers/base/node.c
index bc9f43b..de261f5 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -119,6 +119,7 @@ static ssize_t node_read_meminfo(struct device *dev,
 		       "Node %d SUnreclaim:     %8lu kB\n"
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 		       "Node %d AnonHugePages:  %8lu kB\n"
+		       "Node %d FileHugePages:  %8lu kB\n"
 #endif
 			,
 		       nid, K(node_page_state(nid, NR_FILE_DIRTY)),
@@ -140,6 +141,9 @@ static ssize_t node_read_meminfo(struct device *dev,
 		       nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE))
 			, nid,
 			K(node_page_state(nid, NR_ANON_TRANSPARENT_HUGEPAGES) *
+			HPAGE_PMD_NR)
+			, nid,
+			K(node_page_state(nid, NR_FILE_TRANSPARENT_HUGEPAGES) *
 			HPAGE_PMD_NR));
 #else
 		       nid, K(node_page_state(nid, NR_SLAB_UNRECLAIMABLE)));
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index 59d85d6..a62952c 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -104,6 +104,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
 #endif
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 		"AnonHugePages:  %8lu kB\n"
+		"FileHugePages:  %8lu kB\n"
 #endif
 		,
 		K(i.totalram),
@@ -158,6 +159,8 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
 		,K(global_page_state(NR_ANON_TRANSPARENT_HUGEPAGES) *
 		   HPAGE_PMD_NR)
+		,K(global_page_state(NR_FILE_TRANSPARENT_HUGEPAGES) *
+		   HPAGE_PMD_NR)
 #endif
 		);
 
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 0c41d59..ba81833 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -142,6 +142,7 @@ enum zone_stat_item {
 	NUMA_OTHER,		/* allocation from other node */
 #endif
 	NR_ANON_TRANSPARENT_HUGEPAGES,
+	NR_FILE_TRANSPARENT_HUGEPAGES,
 	NR_FREE_CMA_PAGES,
 	NR_VM_ZONE_STAT_ITEMS };
 
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 87228c5..ffe3fbd 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -739,6 +739,7 @@ const char * const vmstat_text[] = {
 	"numa_other",
 #endif
 	"nr_anon_transparent_hugepages",
+	"nr_file_transparent_hugepages",
 	"nr_free_cma",
 	"nr_dirty_threshold",
 	"nr_dirty_background_threshold",
-- 
1.8.3.2

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