1. A method of paged memory management for a software process executing in a computer system, the method comprising; monitoring, by a memory paging subsystem via an operating mode change detector, memory accesses of a first operating mode of the software process, where the first operating mode comprises an operational mode and comprises associated first process memory page use information comprising a first data structure that identifies a first set of process memory pages accessed by the monitored memory accesses of the software process during execution in the first operating mode; detecting, based upon the monitored memory accesses of the first operating mode of the software process, a change in the operating mode of the software process to a second operating mode; in response to a determination, responsive to monitoring the memory accesses of the first operating mode of the software process, that the software process leaves the first operating mode; copying the first process memory page use information as first operating mode memory page use information; and storing the first operating mode memory page use information; monitoring, via the operating mode change detector, memory accesses of the second operating mode of the software process, where the second operating mode comprises a housekeeping mode and comprises associated second process memory page use information comprising a second data structure that identifies a second set of process memory pages accessed by the monitored memory accesses of the software process during execution in the second operating mode; in response to a determination, responsive to monitoring the memory accesses of the second operating mode of the software process, that the software process leaves the second operating mode: copying the second process memory page use information as second operating mode memory page use information; and storing the second operating mode memory page use information; in response to a determination, responsive to monitoring first additional memory accesses of the software process, that the software process re-enters the first operating mode, retrieving the stored first operating mode memory page use information; where, at the re-entry into the first operating mode, the software process operates in the first operating mode using the first set of process memory pages identified within the first data structure of the retrieved first operating mode memory page use information, and the first set of process memory pages accurately reflect memory page usage and the monitored memory accesses of the first operating mode of the software process; and in response to a determination, responsive to monitoring second additional memory accesses of the software process, that the software process re-enters the second operating mode, retrieving the stored second operation mode memory page use information; where, at the re-entry into the second operating mode, the software process operates in the second operating mode using the second set of process memory pages identified within the second data structure of the retrieved second operating mode memory page use information, and the second set of process memory pages accurately reflect memory page usage and the monitored memory accesses of the second operating mode of the software process.