Commit ea941f0e2a8c02ae876cd73deb4e1557248f258c
Committed by
Linus Torvalds
Linus Torvalds
1 parent
f629d1c9bd
Exists in
master
and in
20 other branches
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 <mrubin@google.com> Reviewed-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Dave Chinner <david@fromorbit.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Showing 3 changed files with 7 additions and 0 deletions Side-by-side Diff
include/linux/mmzone.h
| ... | ... | @@ -104,6 +104,8 @@ |
| 104 | 104 | NR_ISOLATED_ANON, /* Temporary isolated pages from anon lru */ |
| 105 | 105 | NR_ISOLATED_FILE, /* Temporary isolated pages from file lru */ |
| 106 | 106 | NR_SHMEM, /* shmem pages (included tmpfs/GEM pages) */ |
| 107 | + NR_DIRTIED, /* page dirtyings since bootup */ | |
| 108 | + NR_WRITTEN, /* page writings since bootup */ | |
| 107 | 109 | #ifdef CONFIG_NUMA |
| 108 | 110 | NUMA_HIT, /* allocated in intended node */ |
| 109 | 111 | NUMA_MISS, /* allocated in non intended node */ |
mm/page-writeback.c
| ... | ... | @@ -1121,6 +1121,7 @@ |
| 1121 | 1121 | { |
| 1122 | 1122 | if (mapping_cap_account_dirty(mapping)) { |
| 1123 | 1123 | __inc_zone_page_state(page, NR_FILE_DIRTY); |
| 1124 | + __inc_zone_page_state(page, NR_DIRTIED); | |
| 1124 | 1125 | __inc_bdi_stat(mapping->backing_dev_info, BDI_RECLAIMABLE); |
| 1125 | 1126 | task_dirty_inc(current); |
| 1126 | 1127 | task_io_account_write(PAGE_CACHE_SIZE); |
| ... | ... | @@ -1136,6 +1137,7 @@ |
| 1136 | 1137 | void account_page_writeback(struct page *page) |
| 1137 | 1138 | { |
| 1138 | 1139 | inc_zone_page_state(page, NR_WRITEBACK); |
| 1140 | + inc_zone_page_state(page, NR_WRITTEN); | |
| 1139 | 1141 | } |
| 1140 | 1142 | EXPORT_SYMBOL(account_page_writeback); |
| 1141 | 1143 |