The patch titled
Subject: page_writeback: put account_page_redirty() after set_page_dirty()
has been added to the -mm tree. Its filename is
page_writeback-put-account_page_redirty-after-set_page_dirty.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/page_writeback-put-account_page_redirty-after-set_page_dirty.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/page_writeback-put-account_page_redirty-after-set_page_dirty.patch
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------------------------------------------------------
From: Konstantin Khebnikov <khlebnikov@xxxxxxxxxxxxxx>
Subject: page_writeback: put account_page_redirty() after set_page_dirty()
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>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/extent_io.c | 2 +-
mm/page-writeback.c | 5 ++++-
2 files changed, 5 insertions(+), 2 deletions(-)
diff -puN fs/btrfs/extent_io.c~page_writeback-put-account_page_redirty-after-set_page_dirty fs/btrfs/extent_io.c
--- a/fs/btrfs/extent_io.c~page_writeback-put-account_page_redirty-after-set_page_dirty
+++ a/fs/btrfs/extent_io.c
@@ -1407,8 +1407,8 @@ int extent_range_redirty_for_io(struct i
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 -puN mm/page-writeback.c~page_writeback-put-account_page_redirty-after-set_page_dirty mm/page-writeback.c
--- a/mm/page-writeback.c~page_writeback-put-account_page_redirty-after-set_page_dirty
+++ a/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);
_
Patches currently in -mm which might be from khlebnikov@xxxxxxxxxxxxxx are
page_writeback-put-account_page_redirty-after-set_page_dirty.patch
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