The patch titled
writeback: add /sys/devices/system/node/<node>/vmstat
has been added to the -mm tree. Its filename is
writeback-add-sys-devices-system-node-node-vmstat.patch
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------------------------------------------------------
Subject: writeback: add /sys/devices/system/node/<node>/vmstat
From: Michael Rubin <mrubin@xxxxxxxxxx>
For NUMA node systems it is important to have visibility in memory
characteristics. Two of the /proc/vmstat values "nr_written" and
"nr_dirtied" are added here.
# cat /sys/devices/system/node/node20/vmstat
nr_written 0
nr_dirtied 0
Signed-off-by: Michael Rubin <mrubin@xxxxxxxxxx>
Reviewed-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Nick Piggin <nickpiggin@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/base/node.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff -puN drivers/base/node.c~writeback-add-sys-devices-system-node-node-vmstat drivers/base/node.c
--- a/drivers/base/node.c~writeback-add-sys-devices-system-node-node-vmstat
+++ a/drivers/base/node.c
@@ -160,6 +160,18 @@ static ssize_t node_read_numastat(struct
}
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
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 */
_
Patches currently in -mm which might be from mrubin@xxxxxxxxxx are
vmscan-do-not-writeback-filesystem-pages-in-direct-reclaim.patch
vmscan-kick-flusher-threads-to-clean-pages-when-reclaim-is-encountering-dirty-pages.patch
mm-export-account_page_dirty.patch
mm-add-account_page_writeback.patch
writeback-add-nr_dirtied-and-nr_written-to-proc-vmstat.patch
writeback-add-nr_dirtied-and-nr_written-to-proc-vmstat-fix.patch
writeback-add-sys-devices-system-node-node-vmstat.patch
writeback-report-dirty-thresholds-in-proc-vmstat.patch
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