You have misunderstood what transactional memory is. Think of it as database transaction applied to memory operations. Like a database transaction makes a colle

You have misunderstood what transactional memory is. Think of it as database transaction applied to memory operations. Like a database transaction makes a collection of read and write and computation based on those read and write appear atomic w.r.t other transactions and read/write, transactional memory generally aims to make a section of instructions to have transactional semantic for all load and store and other instructions in the transaction. Most transactional memory proposals are not page level granularity - though obviously most proposals have certain limits, and byte level being too granular doesn't even make any sense.