From c8e28ce049faa53a470c132893abbc9f2bde9420 Mon Sep 17 00:00:00 2001 From: Wu Fengguang Date: Sun, 23 Jan 2011 10:07:47 -0600 Subject: writeback: account per-bdi accumulated dirtied pages Introduce the BDI_DIRTIED counter. It will be used for estimating the bdi's dirty bandwidth. CC: Jan Kara CC: Michael Rubin CC: Peter Zijlstra Signed-off-by: Wu Fengguang --- mm/backing-dev.c | 2 ++ mm/page-writeback.c | 1 + 2 files changed, 3 insertions(+) (limited to 'mm') diff --git a/mm/backing-dev.c b/mm/backing-dev.c index a87da524a4a0..fea7e6efd1d7 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -97,6 +97,7 @@ static int bdi_debug_stats_show(struct seq_file *m, void *v) "BdiDirtyThresh: %10lu kB\n" "DirtyThresh: %10lu kB\n" "BackgroundThresh: %10lu kB\n" + "BdiDirtied: %10lu kB\n" "BdiWritten: %10lu kB\n" "BdiWriteBandwidth: %10lu kBps\n" "b_dirty: %10lu\n" @@ -109,6 +110,7 @@ static int bdi_debug_stats_show(struct seq_file *m, void *v) K(bdi_thresh), K(dirty_thresh), K(background_thresh), + (unsigned long) K(bdi_stat(bdi, BDI_DIRTIED)), (unsigned long) K(bdi_stat(bdi, BDI_WRITTEN)), (unsigned long) K(bdi->write_bandwidth), nr_dirty, diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 0e309cd1b5b9..0e6dd5c2ed31 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -1322,6 +1322,7 @@ void account_page_dirtied(struct page *page, struct address_space *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); + __inc_bdi_stat(mapping->backing_dev_info, BDI_DIRTIED); task_dirty_inc(current); task_io_account_write(PAGE_CACHE_SIZE); } -- cgit v1.2.3