1. A method comprising: generating pre-allocated memory regions for a plurality of subsystems within a storage system; and for each of the plurality of subsystems; initiating a process; and mapping a corresponding one of the pre-allocated memory regions into a memory space of the process, wherein a pre-allocated memory region is generated prior to a corresponding subsystem starting up, wherein the plurality of subsystems includes a management subsystem, the method further comprising: for each of the plurality of subsystems other than the management subsystem, reporting to the management subsystem that the subsystem is ready to process I/O operations; processing I/O operations using the plurality of subsystems; regenerating a pre-allocated memory region for a subsystem in response to a binary associated with subsystem being modified, wherein regenerating a pre-allocated memory region for a subsystem comprises truncating a file within an in-memory file system.