Patent ID: 8234642

Claim:
A computer program product for processing requests of a logically partitioned computer system comprising a plurality of logical partitions, the computer program product comprising: a storage medium readable by a processor and storing instructions for execution by the processor for performing a method comprising: obtaining by a receiving processing unit of the logically partitioned computer system a request of a sending processing unit of the logically partitioned computer system, said sending processing unit being associated with one logical partition of the logically partitioned computer system and the request including a logical partition identifier of the one logical partition, and the receiving processing unit being in the one logical partition or another logical partition of the logically partitioned computer system; determining whether the request is to be blocked by the receiving processing unit, wherein the determining comprises comparing the logical partition identifier of the request with a logical partition identifier of the receiving processing unit; and blocking processing of the request by the receiving processing unit, in response to the comparing indicating a mismatch between the logical partition identifier of the request and the logical partition identifier of the receiving processing unit, wherein a mismatch indicates that the sending processing unit and the receiving processing unit are in different logical partitions, and wherein the blocking comprises providing by the receiving processing unit to a controller an indication that the receiving processing unit has reached a processing point associated with the request even though the receiving processing unit does not perform the request, and wherein the request is a quiesce request associated with a purge operation, and wherein the purge operation is associated with one or more of the following instructions: an instruction to invalidate one or more page table entries; an instruction to set one or more storage keys; and an instruction to perform at least one compare and swap in storage and to purge one or more entries.