Helper account_page_redirty() fixes dirty pages counter for redirtied pages.
This patch puts it after dirtying and prevents temporary underflows of
dirtied pages counters on zone/bdi and current->nr_dirtied.
Signed-off-by: Konstantin Khebnikov <khlebnikov@xxxxxxxxxxxxxx>
---
fs/btrfs/extent_io.c | 2 +-
mm/page-writeback.c | 5 ++++-
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 4ebabd2..281bc7e 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1407,8 +1407,8 @@ int extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end)
while (index <= end_index) {
page = find_get_page(inode->i_mapping, index);
BUG_ON(!page); /* Pages should be in the extent_io_tree */
- account_page_redirty(page);
__set_page_dirty_nobuffers(page);
+ account_page_redirty(page);
page_cache_release(page);
index++;
}
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 6f43352..4da3cd5 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2168,9 +2168,12 @@ EXPORT_SYMBOL(account_page_redirty);
*/
int redirty_page_for_writepage(struct writeback_control *wbc, struct page *page)
{
+ int ret;
+
wbc->pages_skipped++;
+ ret = __set_page_dirty_nobuffers(page);
account_page_redirty(page);
- return __set_page_dirty_nobuffers(page);
+ return ret;
}
EXPORT_SYMBOL(redirty_page_for_writepage);
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>