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authorWu Fengguang <fengguang.wu@intel.com>2011-01-23 19:07:47 +0300
committerWu Fengguang <fengguang.wu@intel.com>2011-10-03 17:08:56 +0400
commitc8e28ce049faa53a470c132893abbc9f2bde9420 (patch)
tree40553e72f50a613c93f4175d1d28d06abc90db65
parent9b13776977d45505469edc6decc93e9e3799afe2 (diff)
downloadlinux-c8e28ce049faa53a470c132893abbc9f2bde9420.tar.xz
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 <jack@suse.cz> CC: Michael Rubin <mrubin@google.com> CC: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
-rw-r--r--include/linux/backing-dev.h1
-rw-r--r--mm/backing-dev.c2
-rw-r--r--mm/page-writeback.c1
3 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index 3b2f9cb82986..9ca241a70c49 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -40,6 +40,7 @@ typedef int (congested_fn)(void *, int);
enum bdi_stat_item {
BDI_RECLAIMABLE,
BDI_WRITEBACK,
+ BDI_DIRTIED,
BDI_WRITTEN,
NR_BDI_STAT_ITEMS
};
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);
}