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authorAndrew Morton <akpm@osdl.org>2006-12-10 02:19:31 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-10 09:55:41 -0800
commite08748ce01e02f0ec154b141f392ccb9555333f4 (patch)
tree9fa9d9f8fb468997f7f6fbcb28e243724d1fdda6 /fs/buffer.c
parent55e829af06681e5d731c03ba04febbd1c76ca293 (diff)
downloadlinux-e08748ce01e02f0ec154b141f392ccb9555333f4.tar.bz2
[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>
Diffstat (limited to 'fs/buffer.c')
-rw-r--r--fs/buffer.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index 904d59d1eb8e..d1f1b54d3108 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -2853,8 +2853,13 @@ int try_to_free_buffers(struct page *page)
* could encounter a non-uptodate page, which is unresolvable.
* This only applies in the rare case where try_to_free_buffers
* succeeds but the page is not freed.
+ *
+ * Also, during truncate, discard_buffer will have marked all
+ * the page's buffers clean. We discover that here and clean
+ * the page also.
*/
- clear_page_dirty(page);
+ if (test_clear_page_dirty(page))
+ task_io_account_cancelled_write(PAGE_CACHE_SIZE);
}
out:
if (buffers_to_free) {