From ea941f0e2a8c02ae876cd73deb4e1557248f258c Mon Sep 17 00:00:00 2001 From: Michael Rubin Date: Tue, 26 Oct 2010 14:21:35 -0700 Subject: writeback: add nr_dirtied and nr_written to /proc/vmstat 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 Reviewed-by: Wu Fengguang Cc: Dave Chinner Cc: Jens Axboe Cc: KOSAKI Motohiro Cc: Nick Piggin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/mmzone.h | 2 ++ mm/page-writeback.c | 2 ++ mm/vmstat.c | 3 +++ 3 files changed, 7 insertions(+) diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 3984c4eb41f..c3c17fb675e 100644 --- a/include/linux/mmzone.h +++ b/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_DIRTIED, /* page dirtyings since bootup */ + NR_WRITTEN, /* page writings since bootup */ #ifdef CONFIG_NUMA NUMA_HIT, /* allocated in intended node */ NUMA_MISS, /* allocated in non intended node */ diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 94159819a65..4dd91f7fd39 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -1121,6 +1121,7 @@ void account_page_dirtied(struct page *page, struct address_space *mapping) { if (mapping_cap_account_dirty(mapping)) { __inc_zone_page_state(page, NR_FILE_DIRTY); + __inc_zone_page_state(page, NR_DIRTIED); __inc_bdi_stat(mapping->backing_dev_info, BDI_RECLAIMABLE); task_dirty_inc(current); task_io_account_write(PAGE_CACHE_SIZE); @@ -1136,6 +1137,7 @@ 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 --git a/mm/vmstat.c b/mm/vmstat.c index 355a9e669aa..44e7ac0fdb6 100644 --- a/mm/vmstat.c +++ b/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", -- cgit v1.2.3-70-g09d2