The patch titled
writeback: add nr_dirtied and nr_written to /proc/vmstat
has been added to the -mm tree. Its filename is
writeback-add-nr_dirtied-and-nr_written-to-proc-vmstat.patch
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------------------------------------------------------
Subject: writeback: add nr_dirtied and nr_written to /proc/vmstat
From: Michael Rubin <mrubin@xxxxxxxxxx>
To help developers and applications gain visibility into writeback
behaviour adding two entries to vm_stat_items and /proc/vmstat. This will
allow us to track the "written" and "dirtied" counts.
# grep nr_dirtied /proc/vmstat
nr_dirtied 3747
# grep nr_written /proc/vmstat
nr_written 3618
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>
---
include/linux/mmzone.h | 2 ++
mm/page-writeback.c | 2 ++
mm/vmstat.c | 3 +++
3 files changed, 7 insertions(+)
diff -puN include/linux/mmzone.h~writeback-add-nr_dirtied-and-nr_written-to-proc-vmstat include/linux/mmzone.h
--- a/include/linux/mmzone.h~writeback-add-nr_dirtied-and-nr_written-to-proc-vmstat
+++ a/include/linux/mmzone.h
@@ -104,6 +104,8 @@ enum zone_stat_item {
NR_ISOLATED_ANON, /* Temporary isolated pages from anon lru */
NR_ISOLATED_FILE, /* Temporary isolated pages from file lru */
NR_SHMEM, /* shmem pages (included tmpfs/GEM pages) */
+ NR_FILE_DIRTIED, /* accumulated dirty pages */
+ NR_WRITTEN, /* accumulated written pages */
#ifdef CONFIG_NUMA
NUMA_HIT, /* allocated in intended node */
NUMA_MISS, /* allocated in non intended node */
diff -puN mm/page-writeback.c~writeback-add-nr_dirtied-and-nr_written-to-proc-vmstat mm/page-writeback.c
--- a/mm/page-writeback.c~writeback-add-nr_dirtied-and-nr_written-to-proc-vmstat
+++ a/mm/page-writeback.c
@@ -1122,6 +1122,7 @@ void account_page_dirtied(struct page *p
{
if (mapping_cap_account_dirty(mapping)) {
__inc_zone_page_state(page, NR_FILE_DIRTY);
+ __inc_zone_page_state(page, NR_FILE_DIRTIED);
__inc_bdi_stat(mapping->backing_dev_info, BDI_RECLAIMABLE);
task_dirty_inc(current);
task_io_account_write(PAGE_CACHE_SIZE);
@@ -1137,6 +1138,7 @@ EXPORT_SYMBOL(account_page_dirtied);
void account_page_writeback(struct page *page)
{
inc_zone_page_state(page, NR_WRITEBACK);
+ inc_zone_page_state(page, NR_WRITTEN);
}
EXPORT_SYMBOL(account_page_writeback);
diff -puN mm/vmstat.c~writeback-add-nr_dirtied-and-nr_written-to-proc-vmstat mm/vmstat.c
--- a/mm/vmstat.c~writeback-add-nr_dirtied-and-nr_written-to-proc-vmstat
+++ a/mm/vmstat.c
@@ -745,6 +745,9 @@ static const char * const vmstat_text[]
"nr_isolated_anon",
"nr_isolated_file",
"nr_shmem",
+ "nr_dirtied",
+ "nr_written",
+
#ifdef CONFIG_NUMA
"numa_hit",
"numa_miss",
_
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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