Virtuаlizаtiоn_4 Memоry Mаnagement 4. [4 pоints] A hypervisor uses ballooning mechanism to allocate/reclaim memory from the VMs, and the memory management policy it follows is as follows: 50% tax on idle memory of a VM Cycle through all VMs with idle memories before double taxing any one VM Consider the following scenario: VM1 requests 800 MB of memory from the hypervisor VM2, VM3, VM4 have respectively 200 MB, 400 MB, and 1 GB of idle memory List the steps taken by the hypervisor to satisfy the memory request of VM1.
OS_Structure_2c Micrоkernel The cоntext fоr this question is the sаme аs the previous question. 2. You аre evaluating a microkernel-based OS following the principles of the L3 microkernel. The processor architecture on which this OS is running has the following features: A byte-addressable 32-bit hardware address space. Paged virtual memory system with a processor register called PTBR that points to the page table in memory to enable hardware address translation. A TLB which DOES NOT support Address space IDs. A pair of hardware-enforced segment registers (lower and upper bound of virtual addresses) which limit the virtual address space that can be accessed by a process running on the processor. The use of segment registers can be toggled on or off by the user. A virtually-indexed physically-tagged processor cache. c. [2 points] For the micro-kernel based OS design, you are embarking on, give one example of a “mechanism” and one example of a “policy” in designing the scheduling subsystem.