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| author | Michael Rubin <mrubin@google.com> | 2010-10-26 14:21:35 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-26 16:52:06 -0700 |
| commit | ea941f0e2a8c02ae876cd73deb4e1557248f258c (patch) | |
| tree | d2006c10cce4f134dc83f7f5aaa1d0096902cc1a /mm/page-writeback.c | |
| parent | f629d1c9bd0dbc44a6c4f9a4a67d1646c42bfc6f (diff) | |
| download | lwn-ea941f0e2a8c02ae876cd73deb4e1557248f258c.tar.gz lwn-ea941f0e2a8c02ae876cd73deb4e1557248f258c.zip | |
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>
Diffstat (limited to 'mm/page-writeback.c')
| -rw-r--r-- | mm/page-writeback.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 94159819a651..4dd91f7fd39f 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); |