linux-kernel - [PATCH 4/5] writeback: Adding /sys/devices/system/node/<node>/vmstat

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1284323440-23205-5-git-send-email-mrubin@google.com>
Date:	Sun, 12 Sep 2010 13:30:39 -0700
From:	Michael Rubin <mrubin@...gle.com>
To:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org
Cc:	fengguang.wu@...el.com, jack@...e.cz, riel@...hat.com,
	akpm@...ux-foundation.org, david@...morbit.com,
	kosaki.motohiro@...fujitsu.com, npiggin@...nel.dk, hch@....de,
	axboe@...nel.dk, Michael Rubin <mrubin@...gle.com>
Subject: [PATCH 4/5] writeback: Adding /sys/devices/system/node/<node>/vmstat

For NUMA node systems it is important to have visibility in memory
characteristics. Two of the /proc/vmstat values "nr_cleaned" and
"nr_dirtied" are added here.

	# cat /sys/devices/system/node/node20/vmstat
	nr_cleaned 0
	nr_dirtied 0

Signed-off-by: Michael Rubin <mrubin@...gle.com>
---
 drivers/base/node.c |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/drivers/base/node.c b/drivers/base/node.c
index 2872e86..6aaccd9 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -160,6 +160,18 @@ static ssize_t node_read_numastat(struct sys_device * dev,
 }
 static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL);
 
+static ssize_t node_read_vmstat(struct sys_device *dev,
+				struct sysdev_attribute *attr, char *buf)
+{
+	int nid = dev->id;
+	return sprintf(buf,
+		"nr_written %lu\n"
+		"nr_dirtied %lu\n",
+		node_page_state(nid, NR_WRITTEN),
+		node_page_state(nid, NR_FILE_DIRTIED));
+}
+static SYSDEV_ATTR(vmstat, S_IRUGO, node_read_vmstat, NULL);
+
 static ssize_t node_read_distance(struct sys_device * dev,
 			struct sysdev_attribute *attr, char * buf)
 {
@@ -243,6 +255,7 @@ int register_node(struct node *node, int num, struct node *parent)
 		sysdev_create_file(&node->sysdev, &attr_meminfo);
 		sysdev_create_file(&node->sysdev, &attr_numastat);
 		sysdev_create_file(&node->sysdev, &attr_distance);
+		sysdev_create_file(&node->sysdev, &attr_vmstat);
 
 		scan_unevictable_register_node(node);
 
@@ -267,6 +280,7 @@ void unregister_node(struct node *node)
 	sysdev_remove_file(&node->sysdev, &attr_meminfo);
 	sysdev_remove_file(&node->sysdev, &attr_numastat);
 	sysdev_remove_file(&node->sysdev, &attr_distance);
+	sysdev_remove_file(&node->sysdev, &attr_vmstat);
 
 	scan_unevictable_unregister_node(node);
 	hugetlb_unregister_node(node);		/* no-op, if memoryless node */
-- 
1.7.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/