[PATCH] io-accounting: write-cancel accounting
Account for the number of byte writes which this process caused to not happen
after all.
Cc: Jay Lan <jlan@sgi.com>
Cc: Shailabh Nagar <nagar@watson.ibm.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Chris Sturtivant <csturtiv@sgi.com>
Cc: Tony Ernst <tee@sgi.com>
Cc: Guillaume Thouvenin <guillaume.thouvenin@bull.net>
Cc: David Wright <daw@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/mm/truncate.c b/mm/truncate.c
index e07b1e6..9bfb8e8 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -13,6 +13,7 @@
#include <linux/module.h>
#include <linux/pagemap.h>
#include <linux/pagevec.h>
+#include <linux/task_io_accounting_ops.h>
#include <linux/buffer_head.h> /* grr. try_to_release_page,
do_invalidatepage */
@@ -69,7 +70,8 @@
if (PagePrivate(page))
do_invalidatepage(page, 0);
- clear_page_dirty(page);
+ if (test_clear_page_dirty(page))
+ task_io_account_cancelled_write(PAGE_CACHE_SIZE);
ClearPageUptodate(page);
ClearPageMappedToDisk(page);
remove_from_page_cache(page);