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Commit 8d38633c authored by Konstantin Khebnikov's avatar Konstantin Khebnikov Committed by Linus Torvalds
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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: default avatarKonstantin Khebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent b30fe6c7

fs/btrfs/extent_io.c

+1 −1
Original line number Diff line number Diff line
@@ -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++;

	}

mm/page-writeback.c

+4 −1
Original line number Diff line number Diff line
@@ -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);