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Btrfs: Fix delayed allocation to avoid missing delalloc extents
find_lock_delalloc_range could exit out too early Signed-off-by: Chris Mason <chris.mason@oracle.com>
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parent
4aec2b5232
commit
190662b212
2 changed files with 8 additions and 2 deletions
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@ -1070,6 +1070,7 @@ u64 find_lock_delalloc_range(struct extent_map_tree *tree,
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search_again:
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node = tree_search(&tree->state, cur_start);
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if (!node || IS_ERR(node)) {
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*end = (u64)-1;
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goto out;
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}
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@ -1079,6 +1080,8 @@ u64 find_lock_delalloc_range(struct extent_map_tree *tree,
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goto out;
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}
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if (!(state->state & EXTENT_DELALLOC)) {
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if (!found)
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*end = state->end;
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goto out;
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}
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if (!found) {
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@ -1841,8 +1844,10 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc,
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nr_delalloc = find_lock_delalloc_range(tree, &delalloc_start,
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&delalloc_end,
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128 * 1024 * 1024);
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if (nr_delalloc <= 0)
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break;
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if (nr_delalloc == 0) {
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delalloc_start = delalloc_end + 1;
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continue;
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}
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tree->ops->fill_delalloc(inode, delalloc_start,
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delalloc_end);
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clear_extent_bit(tree, delalloc_start,
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@ -798,6 +798,7 @@ static int btrfs_cow_one_page(struct inode *inode, struct page *page,
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u64 page_start = (u64)page->index << PAGE_CACHE_SHIFT;
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u64 page_end = page_start + PAGE_CACHE_SIZE - 1;
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WARN_ON(!PageLocked(page));
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set_page_extent_mapped(page);
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lock_extent(em_tree, page_start, page_end, GFP_NOFS);
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