Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=69cb51d18c1ed593009d9a620cac49d0dcf15dc8
Commit: 69cb51d18c1ed593009d9a620cac49d0dcf15dc8
Parent: c9e51e4180696aa67915ec5665e4ec74125565de
Author: Peter Zijlstra <[EMAIL PROTECTED]>
AuthorDate: Tue Oct 16 23:25:48 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Wed Oct 17 08:42:45 2007 -0700
mm: count writeback pages per BDI
Count per BDI writeback pages.
Signed-off-by: Peter Zijlstra <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
include/linux/backing-dev.h | 1 +
mm/page-writeback.c | 12 ++++++++++--
2 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index bfae09d..4d9222c 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -28,6 +28,7 @@ typedef int (congested_fn)(void *, int);
enum bdi_stat_item {
BDI_RECLAIMABLE,
+ BDI_WRITEBACK,
NR_BDI_STAT_ITEMS
};
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 9b3c4ee..f1d201f 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -979,14 +979,18 @@ int test_clear_page_writeback(struct page *page)
int ret;
if (mapping) {
+ struct backing_dev_info *bdi = mapping->backing_dev_info;
unsigned long flags;
write_lock_irqsave(&mapping->tree_lock, flags);
ret = TestClearPageWriteback(page);
- if (ret)
+ if (ret) {
radix_tree_tag_clear(&mapping->page_tree,
page_index(page),
PAGECACHE_TAG_WRITEBACK);
+ if (bdi_cap_writeback_dirty(bdi))
+ __dec_bdi_stat(bdi, BDI_WRITEBACK);
+ }
write_unlock_irqrestore(&mapping->tree_lock, flags);
} else {
ret = TestClearPageWriteback(page);
@@ -1002,14 +1006,18 @@ int test_set_page_writeback(struct page *page)
int ret;
if (mapping) {
+ struct backing_dev_info *bdi = mapping->backing_dev_info;
unsigned long flags;
write_lock_irqsave(&mapping->tree_lock, flags);
ret = TestSetPageWriteback(page);
- if (!ret)
+ if (!ret) {
radix_tree_tag_set(&mapping->page_tree,
page_index(page),
PAGECACHE_TAG_WRITEBACK);
+ if (bdi_cap_writeback_dirty(bdi))
+ __inc_bdi_stat(bdi, BDI_WRITEBACK);
+ }
if (!PageDirty(page))
radix_tree_tag_clear(&mapping->page_tree,
page_index(page),
-
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