| Patent application number | Description | Published |
|---|
| 20080235474 | METHOD AND SYSTEM FOR PROCESSING ACCESS TO DISK BLOCK - Provided are a method and a system for processing an access to a disk block. The system receives a disk block access request from an OS domain, determines whether the OS domain is permitted to access a disk block with reference to a predetermined block table and processes disk block access of the OS domain according to the determination result. Accordingly, OS domains can share caches without having data copy through memory access control in a virtual machine monitor environment. Furthermore, a device domain controls access to a disk drive so that data corruption can be prevented. | 09-25-2008 |
| 20080244206 | METHOD OF CONTROLLING MEMORY ACCESS - Provided is a method of controlling memory access. In a system including a first layer element executed in a privileged mode having a first priority of permission to access the entire region of a memory and second and third layer elements executed in an unprivileged mode having a second priority of permission to access a partial region of the memory, the method of controlling memory access determines whether the memory is accessible for each page that is an address space unit, based on which mode a layer element currently accessing the memory is executed in between the privileged mode and the unprivileged mode; and determines whether the memory is accessible based on which one of the first, second and third layer elements corresponds to a domain currently being attempted to be accessed from among a plurality of domains of the memory. Accordingly, a memory domain allocated to a guest operating system kernel is effectively protected from an application executed in the unprivileged mode in which the guest operating system kernel is executed. | 10-02-2008 |
| 20090165133 | SYSTEM FOR EXECUTING PROGRAM USING VIRTUAL MACHINE MONITOR AND METHOD OF CONTROLLING THE SYSTEM - A system for executing a program using a virtual machine monitor and a method of controlling the system are provided. The system includes a virtual machine monitor which divides an operating system (OS) into at least one root domain and a plurality of domains having different trust levels, and a trust-management module which is included in the root domain and periodically measures the trust level of an application program currently being executed in the OS. The virtual machine monitor executes the application program in one of the domains in consideration of the trust level of the application program. The method includes dividing an OS into at least a root domain and a plurality of domains having different trust levels by using a virtual machine monitor, enabling the root domain to periodically measure the trust level of an application program currently being executed in the OS, and executing the application program in one of the domains according to the trust level of the application program. | 06-25-2009 |
| 20090313406 | APPARATUS AND METHOD FOR ADAPTATION OF INPUT/OUTPUT INTERFACE IN VIRTUALIZATION ENVIRONMENT - Provided are an apparatus and method for adapting an input/output interface. According to the exemplary method, a host system adapts an input/output interface of the guest system to an input/output unit capability of a host system so as to support a service supported by an input/output unit supporting the input/output unit capability of the guest system using the at least one input/output unit of the host system. | 12-17-2009 |
| 20100205363 | MEMORY DEVICE AND WEAR LEVELING METHOD THEREOF - Disclosed is a memory device including a NVRAM and a page table, and a wear leveling method therefor. The page table includes mapping information which maps virtual addresses of the NVRAM with physical addresses of the NVRAM. A page table entry includes aging information which indicates the wear of a corresponding page. The aging information may be a remaining number of write operations allowed to the page. Whenever data is written in a page, a value indicating a remaining number of write operations allowed to that page is decremented. | 08-12-2010 |
| 20100312955 | MEMORY SYSTEM AND METHOD OF MANAGING THE SAME - A memory system to manage a memory using a virtual memory is provided. The memory system may use an asymmetric memory as a swap storage of a dynamic random access memory (DRAM). The asymmetric memory may access on a byte basis, allowing a process to directly access a page swapped out to the asymmetric memory through direct mapping. | 12-09-2010 |
