1. A computer implemented method for performing transactional memory operations in a multi-processor transactional execution (TX) environment, the method comprising: executing an instruction to cause a transaction to be executed, by a processor, in an atomic read-only transaction mode, execution in the atomic read-only transaction mode comprising: tracking memory read accesses as a read-set of the transaction; based on detecting a read-set conflict, aborting the transaction; suppressing any transaction abort due to conflicts of a write-set generated while in the atomic read-only transaction mode; and absent any aborting, completing the transaction, the completing comprising committing stores executed in the transaction to memory and updating architecture states, wherein the write-set is tracked with dirty bits while inside the read-only mode, wherein each dirty bit is associated with a read-only indicator, the read-only indicator indicating that any conflict detected with the write-set should be ignored.