num_extent_pages returns the number of pages in the specific range, not the index of the last page in the eb range.
btrfs_release_extent_buffer_page is called with start_idx set 0 in current codes, so it's not a problem yet. But the logic is indeed wrong. Fix it here. Signed-off-by: Wang Sheng-Hui <[email protected]> --- fs/btrfs/extent_io.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 5505356..ddfc1d5 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -3975,11 +3975,13 @@ static void btrfs_release_extent_buffer_page(struct extent_buffer *eb, unsigned long start_idx) { unsigned long index; + unsigned long num_pages; struct page *page; BUG_ON(extent_buffer_under_io(eb)); - index = num_extent_pages(eb->start, eb->len); + num_pages = num_extent_pages(eb->start, eb->len); + index = start_idx + num_pages; if (start_idx >= index) return; -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
