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authorAndrew Morton <akpm@osdl.org>2006-12-10 02:19:27 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-10 09:55:41 -0800
commit55e829af06681e5d731c03ba04febbd1c76ca293 (patch)
tree4304030be250d913f56696ffda8ae660fb17b110 /mm
parent[PATCH] clean up __set_page_dirty_nobuffers() (diff)
downloadlinux-dev-55e829af06681e5d731c03ba04febbd1c76ca293.tar.xz
linux-dev-55e829af06681e5d731c03ba04febbd1c76ca293.zip
[PATCH] io-accounting: write accounting
Accounting writes is fairly simple: whenever a process flips a page from clean to dirty, we accuse it of having caused a write to underlying storage of PAGE_CACHE_SIZE bytes. This may overestimate the amount of writing: the page-dirtying may cause only one buffer_head's worth of writeout. Fixing that is possible, but probably a bit messy and isn't obviously important. 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 'mm')
-rw-r--r--mm/page-writeback.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 59ffcdbde8b3..237107c1b084 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -21,6 +21,7 @@
#include <linux/writeback.h>
#include <linux/init.h>
#include <linux/backing-dev.h>
+#include <linux/task_io_accounting_ops.h>
#include <linux/blkdev.h>
#include <linux/mpage.h>
#include <linux/rmap.h>
@@ -768,8 +769,10 @@ int __set_page_dirty_nobuffers(struct page *page)
mapping2 = page_mapping(page);
if (mapping2) { /* Race with truncate? */
BUG_ON(mapping2 != mapping);
- if (mapping_cap_account_dirty(mapping))
+ if (mapping_cap_account_dirty(mapping)) {
__inc_zone_page_state(page, NR_FILE_DIRTY);
+ task_io_account_write(PAGE_CACHE_SIZE);
+ }
radix_tree_tag_set(&mapping->page_tree,
page_index(page), PAGECACHE_TAG_DIRTY);
}