Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Smtp-Origin-Hostprefix: devbig
From:   Song Liu <songliubraving@fb.com>
Smtp-Origin-Hostname: devbig006.ftw2.facebook.com
To:     <linux-mm@kvack.org>, <linux-fsdevel@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>
CC:     <matthew.wilcox@oracle.com>, <kirill.shutemov@linux.intel.com>,
        <kernel-team@fb.com>, <william.kucharski@oracle.com>,
        <akpm@linux-foundation.org>, Song Liu <songliubraving@fb.com>
Smtp-Origin-Cluster: ftw2c04
Subject: [PATCH v5 3/6] mm,thp: stats for file backed THP
Date:   Thu, 20 Jun 2019 13:53:45 -0700
Message-ID: <20190620205348.3980213-4-songliubraving@fb.com>
In-Reply-To: <20190620205348.3980213-1-songliubraving@fb.com>
References: <20190620205348.3980213-1-songliubraving@fb.com>
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

In preparation for non-shmem THP, this patch adds two stats and exposes
them in /proc/meminfo

Acked-by: Rik van Riel <riel@surriel.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
---
 fs/proc/meminfo.c      | 4 ++++
 include/linux/mmzone.h | 2 ++
 mm/vmstat.c            | 2 ++
 3 files changed, 8 insertions(+)

diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index 568d90e17c17..bac395fc11f9 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -136,6 +136,10 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
 		    global_node_page_state(NR_SHMEM_THPS) * HPAGE_PMD_NR);
 	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);
+	show_val_kb(m, "FilePmdMapped: ",
+		    global_node_page_state(NR_FILE_PMDMAPPED) * HPAGE_PMD_NR);
 #endif
 
 #ifdef CONFIG_CMA
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 70394cabaf4e..827f9b777938 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -234,6 +234,8 @@ enum node_stat_item {
 	NR_SHMEM,		/* shmem pages (included tmpfs/GEM pages) */
 	NR_SHMEM_THPS,
 	NR_SHMEM_PMDMAPPED,
+	NR_FILE_THPS,
+	NR_FILE_PMDMAPPED,
 	NR_ANON_THPS,
 	NR_UNSTABLE_NFS,	/* NFS unstable pages */
 	NR_VMSCAN_WRITE,
diff --git a/mm/vmstat.c b/mm/vmstat.c
index fd7e16ca6996..6afc892a148a 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1158,6 +1158,8 @@ const char * const vmstat_text[] = {
 	"nr_shmem",
 	"nr_shmem_hugepages",
 	"nr_shmem_pmdmapped",
+	"nr_file_hugepages",
+	"nr_file_pmdmapped",
 	"nr_anon_transparent_hugepages",
 	"nr_unstable",
 	"nr_vmscan_write",
-- 
2.17.1