A system and associated method for handling a system call in a hybrid system. The hybrid system comprises a first computer system and a second computer system coupled to the first computer system at a respective kernel of the respective computer system. A user application of the first computer system requests a kernel service by invoking a system call to a first kernel. The first kernel determines that the system call is remotely executed by a second kernel of the second computer system. The system call and associated parameters are converted to be executable in the second computer system and transferred to the second computer system. The second computer system executes the system call and a result is returned to the first computer system. The result is reversely converted for the first computer system and the user application receives the result.