Btrfs: Make sure pages are dirty before doing delalloc for them



This adds a PageDirty check to the writeback path that locks pages
for delalloc.  If a page wasn't dirty at this point, it is in the
process of being truncated away.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

parent 5b7c3fcc

fs/btrfs/extent_io.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1205,7 +1205,8 @@ static noinline int lock_delalloc_pages(struct inode *inode,
		*/
		if (pages[i] != locked_page) {
		lock_page(pages[i]);
		if (pages[i]->mapping != inode->i_mapping) {
		if (!PageDirty(pages[i]) \|\|
		pages[i]->mapping != inode->i_mapping) {
		ret = -EAGAIN;
		unlock_page(pages[i]);
		page_cache_release(pages[i]);