1. A computing system comprising: a plurality of processors; a cache configured to be accessed by at least two of the plurality of processors; a cache controller coupled to the cache; a persistent memory coupled to the cache controller; wherein a first processor of the plurality of processors is configured to send a given data block to the persistent memory for storage via the cache controller; and wherein the cache controller is configured to prevent any read access of a copy of the given data block in said cache, in response to detecting the given data block is to be sent to be stored in the persistent memory.