Btrfs: Fix delayed allocation to avoid missing delalloc extents (190662b2) · Commits · 戴 / test

fs/btrfs/extent_map.c

+7 −2

Original line number	Diff line number	Diff line
		@@ -1070,6 +1070,7 @@ u64 find_lock_delalloc_range(struct extent_map_tree *tree,
		search_again:
		node = tree_search(&tree->state, cur_start);
		if (!node \|\| IS_ERR(node)) {
		*end = (u64)-1;
		goto out;
		}

		@@ -1079,6 +1080,8 @@ search_again:
		goto out;
		}
		if (!(state->state & EXTENT_DELALLOC)) {
		if (!found)
		*end = state->end;
		goto out;
		}
		if (!found) {
		@@ -1841,8 +1844,10 @@ static int __extent_writepage(struct page page, struct writeback_control wbc,
		nr_delalloc = find_lock_delalloc_range(tree, &delalloc_start,
		&delalloc_end,
		128 * 1024 * 1024);
		if (nr_delalloc <= 0)
		break;
		if (nr_delalloc == 0) {
		delalloc_start = delalloc_end + 1;
		continue;
		}
		tree->ops->fill_delalloc(inode, delalloc_start,
		delalloc_end);
		clear_extent_bit(tree, delalloc_start,

+1 −0

Original line number	Diff line number	Diff line
		@@ -798,6 +798,7 @@ static int btrfs_cow_one_page(struct inode inode, struct page page,
		u64 page_start = (u64)page->index << PAGE_CACHE_SHIFT;
		u64 page_end = page_start + PAGE_CACHE_SIZE - 1;

		WARN_ON(!PageLocked(page));
		set_page_extent_mapped(page);

		lock_extent(em_tree, page_start, page_end, GFP_NOFS);