公开(公告)号：US20070113227A1

公开(公告)日：2007-05-17

申请号：US11274907

申请日：2005-11-15

申请人： Adrian Oney ,  Bryan Willman ,  Eric Traut ,  Forrest Foltz ,  John Sheu ,  Matthew Hendel ,  Rene Vega

发明人： Adrian Oney ,  Bryan Willman ,  Eric Traut ,  Forrest Foltz ,  John Sheu ,  Matthew Hendel ,  Rene Vega

IPC分类号： G06F9/455 ,  G06F12/00

CPC分类号： G06F21/575 ,  G06F21/53 ,  G06F21/6245

摘要： An operating system is described that is capable of ascertaining whether it is executing in a virtual machine environment and is further capable of modifying its behavior to operate more efficiently and provide optimal behavior in a virtual machine environment. An operating system is enlightened so that it is aware of VMMs or hypervisors, taking on behavior that is optimal to that environment. The VMM or hypervisor informs the operating system of the optimal behavior, and vice versa.

摘要翻译： 描述了能够确定其是否在虚拟机环境中执行并且还能够修改其行为以更有效地操作并在虚拟机环境中提供最佳行为的操作系统。 操作系统被启发，以便它知道VMM或虚拟机管理程序，采取对该环境最佳的行为。 VMM或管理程序通知操作系统最佳行为，反之亦然。

公开(公告)号：US20060259734A1

公开(公告)日：2006-11-16

申请号：US11128982

申请日：2005-05-13

申请人： John Sheu ,  David Bailey ,  Eric Traut ,  Rene Vega

发明人： John Sheu ,  David Bailey ,  Eric Traut ,  Rene Vega

IPC分类号： G06F12/00

CPC分类号： G06F12/1036 ,  G06F2212/151 ,  G06F2212/683

摘要： A method of virtualizing memory through shadow page tables that cache translations from multiple guest address spaces in a virtual machine includes a software version of a hardware tagged translation look-aside buffer. Edits to guest page tables are detected by intercepting the creation of guest-writable mappings to guest page tables with translations cached in shadow page tables. The affected cached translations are marked as stale and purged upon an address space switch or an indiscriminate flush of translations by the guest. Thereby, non-stale translations remain cached but stale translations are discarded. The method includes tracking the guest-writable mappings to guest page tables, deferring discovery of such mappings to a guest page table for the first time until a purge of all cached translations when the number of untracked guest page tables exceeds a threshold, and sharing shadow page tables between shadow address spaces and between virtual processors.

摘要翻译： 通过影像页表虚拟化存储器的方法，其缓存来自虚拟机中的多个访客地址空间的转换，包括硬件标记的翻译后备缓冲器的软件版本。 通过拦截向客户页面表创建客户机可写映射，并通过缓存在阴影页表中的翻译来检测访客页面表的编辑。 受影响的缓存翻译被标记为陈旧，并被清除在地址空间开关或客人不加区别地翻译翻译。 因此，非陈旧的翻译仍保持高速缓存，但是陈旧的翻译将被丢弃。 该方法包括跟踪访客页面表的访客可写映射，将此类映射的发现推迟到访客页面表，直到当未跟踪的访客页面表的数量超过阈值时清除所有缓存的翻译，并共享阴影 阴影地址空间和虚拟处理器之间的页表。