The old extent merging code down underneath "ocfs2_mark_extent_written()" can't merge extents between leaf blocks. This patch resolve this. So that a large unwritten extent which has been split up with a bunch of writes can be merged together once all unwritten regions have been written to.
Modification from V1 to V2: 1. Add more comments for some functions which is more complicated than before. 2. move the journal_access() calls to a better place so that we may detect its error before we do the real modification to some extent blocks. 3. Using l_next_free_rec instead of l_count to index the extent record array so that it's more consistent with other codes. 4. Delete the empty extent block during ocfs2_merge_rec_left when it is needed instead of leaving it to ocfs2_rotate_tree_left. 5. Stick to one merge mechanism in CONTIG_LEFTRIGHT. Right merge is always the first instead of left one. _______________________________________________ Ocfs2-devel mailing list Ocfs2-devel@oss.oracle.com http://oss.oracle.com/mailman/listinfo/ocfs2-devel
