Multi-host remote memory access

A method comprising:

• processing tasks by circuitry of a plurality of clients of a plurality of processing nodes;
• receiving, by circuitry of a first processing node of the plurality of processing nodes, a first memory access request comprising a first virtual address;
• and
• conveying a remote presence check request to a remote processing node, responsive to the first virtual address being mapped to a first physical address of a storage location in the remote processing node.

A computing system comprising:

• a plurality of processing nodes, each comprising circuitry configured to process tasks;
• wherein a first processing node of the plurality of processing nodes comprises:
• a plurality of clients comprising circuitry configured to generate memory access requests;
• and
• a control circuit configured to convey a remote presence check request to a second processing node different from the first processing node requesting an indication of whether a first physical address is present at the second processing node, responsive to a first virtual address of a first memory access request is mapped to the first physical address.