This series (on top of the iomap series) reduce the number of lookups we do in the COW tree by adding a sequence number that counts modifications to the extent tree. Changes since v2: - bump if_seq before modifying the extent tree Changes since v1: - don't update wpc->cow_seq for non-COW allocations - update a comment - rebase to the lastest tree as baseline -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
