公开(公告)号：US09529728B2

公开(公告)日：2016-12-27

申请号：US12900271

申请日：2010-10-07

申请人： Yury Baskakov ,  Alexander Garthwaite ,  Jesse Pool

发明人： Yury Baskakov ,  Alexander Garthwaite ,  Jesse Pool

IPC分类号： G06F12/00 ,  G06F12/10

CPC分类号： G06F3/061 ,  G06F3/065 ,  G06F3/0662 ,  G06F3/0673 ,  G06F12/10 ,  G06F2212/151 ,  G06F2212/65 ,  G06F2212/656

摘要： Updating contents of certain memory pages in a virtual machine system is deferred until they are needed. Specifically, certain page update operations are deferred until the page is accessed for a load or store operation. Each page within the virtual machine system includes associated metadata, which includes a page signature characterizing the contents of a corresponding page or a reference to a page with canonical contents, and a flag that indicates the page needs to be updated before being accessed. The metadata may also include a flag to indicate that a backing store of the memory page has contents of a known content class. When such a memory page is mapped to a shared page with contents of that known content class, a flag in the metadata to indicate that contents of the memory page needs to be updated is not set.

摘要翻译： 更新虚拟机系统中某些内存页的内容将被延迟，直到需要。 具体来说，某些页面更新操作将被延迟，直到访问页面以进行加载或存储操作。 虚拟机系统内的每个页面包括关联的元数据，其包括表征对应页面的内容的页面签名或具有规范内容的页面的引用，以及指示页面在被访问之前需要被更新的标志。 元数据还可以包括用于指示存储器页的后备存储具有已知内容类的内容的标志。 当这样的存储器页面被映射到具有该已知内容类的内容的共享页面时，不设置用于指示存储器页面的内容需要被更新的元数据中的标志。

公开(公告)号：US09086981B1

公开(公告)日：2015-07-21

申请号：US12938107

申请日：2010-11-02

申请人： Kiran Tati ,  Gabriel Tarasuk-Levin ,  KaWing Ho ,  Jesse Pool

发明人： Kiran Tati ,  Gabriel Tarasuk-Levin ,  KaWing Ho ,  Jesse Pool

IPC分类号： G06F12/00 ,  G06F12/10 ,  G06F9/455

CPC分类号： G06F12/0882 ,  G06F9/45558 ,  G06F12/08 ,  G06F12/10 ,  G06F2009/4557 ,  G06F2009/45583 ,  G06F2212/1008 ,  G06F2212/151 ,  G06F2212/654 ,  G06F2212/657

摘要： When a request is made to retrieve a guest physical page from memory and a page fault occurs, a guest virtual page address that corresponds to the guest physical page is identified along with addresses for guest virtual pages that are near the guest virtual page in the virtual address space. Each identified guest virtual page address is translated into a corresponding guest physical page address and the corresponding guest physical pages are loaded into memory.

摘要翻译： 当请求从存储器检索访客物理页面并发生页面错误时，与访客物理页面相对应的访客虚拟页面地址与虚拟的客体虚拟页面附近的访客虚拟页面的地址一起被识别 地址空间。 每个已识别的客户虚拟页面地址被转换成相应的访客物理页面地址，并且相应的访客物理页面被加载到存储器中。

公开(公告)号：US09135171B2

公开(公告)日：2015-09-15

申请号：US12834962

申请日：2010-07-13

申请人： Yury Baskakov ,  Alexander Thomas Garthwaite ,  Jesse Pool ,  Carl A. Waldspurger ,  Rajesh Venkatasubramanian ,  Ishan Banerjee

发明人： Yury Baskakov ,  Alexander Thomas Garthwaite ,  Jesse Pool ,  Carl A. Waldspurger ,  Rajesh Venkatasubramanian ,  Ishan Banerjee

IPC分类号： G06F12/00 ,  G06F12/08 ,  G06F11/14 ,  G06F12/10 ,  G06F9/455

CPC分类号： G06F12/08 ,  G06F11/1448 ,  G06F12/10 ,  G06F2009/45583 ,  G06F2212/151 ,  G06F2212/401 ,  G06F2221/0782

摘要： Page data of a virtual machine is represented for efficient save and restore operations. One form of representation applies to each page with an easily identifiable pattern. The page is described, saved, and restored in terms of metadata reflective of the pattern rather than a complete page of data reflecting the pattern. During a save or restore operation, however, the metadata of the page is represented, but not the page data. Another form of representation applies to each page sharing a canonical instance of a complex pattern that is instantiated in memory during execution, and explicitly saved and restored. Each page sharing the canonical page is saved and restored as a metadata reference, without the need to actually save redundant copies of the page data.

摘要翻译： 虚拟机的页面数据被表示为有效的保存和恢复操作。 一种形式的表示适用于每个页面，具有容易识别的模式。 根据反映模式的元数据来描述，保存和恢复页面，而不是反映模式的完整数据页面。 然而，在保存或恢复操作期间，表示页面的元数据，而不是页面数据。 另一种形式的表示适用于共享在执行期间在内存中实例化的复杂模式的规范实例的每个页面，并显式地保存和恢复。 共享规范页面的每个页面将作为元数据引用进行保存和恢复，而无需实际保存页面数据的冗余副本。

公开(公告)号：US20120017027A1

公开(公告)日：2012-01-19

申请号：US12834962

申请日：2010-07-13

申请人： Yury BASKAKOV ,  Alexander Thomas GARTHWAITE ,  Jesse POOL ,  Carl A. WALDSPURGER ,  Rajesh VENKATASUBRAMANIAN ,  Ishan BANERJEE

发明人： Yury BASKAKOV ,  Alexander Thomas GARTHWAITE ,  Jesse POOL ,  Carl A. WALDSPURGER ,  Rajesh VENKATASUBRAMANIAN ,  Ishan BANERJEE

IPC分类号： G06F12/10 ,  G06F12/08 ,  G06F12/00

CPC分类号： G06F12/08 ,  G06F11/1448 ,  G06F12/10 ,  G06F2009/45583 ,  G06F2212/151 ,  G06F2212/401 ,  G06F2221/0782

摘要： Page data of a virtual machine is represented for efficient save and restore operations. One form of representation applies to each page with an easily identifiable pattern. The page is described, saved, and restored in terms of metadata reflective of the pattern rather than a complete page of data reflecting the pattern. During a save or restore operation, however, the metadata of the page is represented, but not the page data. Another form of representation applies to each page sharing a canonical instance of a complex pattern that is instantiated in memory during execution, and explicitly saved and restored. Each page sharing the canonical page is saved and restored as a metadata reference, without the need to actually save redundant copies of the page data.

摘要翻译： 虚拟机的页面数据被表示为有效的保存和恢复操作。 一种形式的表示适用于每个页面，具有容易识别的模式。 根据反映模式的元数据来描述，保存和恢复页面，而不是反映模式的完整数据页面。 然而，在保存或恢复操作期间，表示页面的元数据，而不是页面数据。 另一种形式的表示适用于共享在执行期间在内存中实例化的复杂模式的规范实例的每个页面，并显式地保存和恢复。 共享规范页面的每个页面将作为元数据引用进行保存和恢复，而无需实际保存页面数据的冗余副本。

公开(公告)号：US20100070678A1

公开(公告)日：2010-03-18

申请号：US12559484

申请日：2009-09-14

申请人： Irene ZHANG ,  Kenneth Charles BARR ,  Ganesh VENKITACHALAM ,  Irfan AHMAD ,  Alex GARTHWAITE ,  Jesse POOL

发明人： Irene ZHANG ,  Kenneth Charles BARR ,  Ganesh VENKITACHALAM ,  Irfan AHMAD ,  Alex GARTHWAITE ,  Jesse POOL

IPC分类号： G06F12/00 ,  G06F9/455

CPC分类号： G06F9/45558 ,  G06F9/461 ,  G06F9/485 ,  G06F9/5016 ,  G06F11/1438 ,  G06F12/08 ,  G06F2009/45575 ,  G06F2009/45583

摘要： Prior to or while the state of a virtual machine (“VM”) is being saved, such as in connection with the suspension or checkpointing of a VM, a set of one or more “active” memory pages is identified, this set of active memory pages comprising memory pages that are in use within the VM before operation of the VM is suspended. This set of active memory pages may constitute a “working set” of memory pages. To restore the state of the VM and resume operation, in some embodiments, (a) access to persistent storage is restored to the VM, device state for the VM is restored, and one or more of the set of active memory pages are loaded into physical memory; (b) operation of the VM is resumed; and (c) additional memory pages from the saved state of the VM are loaded into memory after operation of the VM has resumed.

摘要翻译： 在保存虚拟机（“VM”）的状态之前，例如与VM的暂停或检查点相关联，识别一组或多个“活动”存储器页面的集合，该组活动 在VM的操作之前暂停在VM内使用的存储器页面的存储器页面。 这组活动内存页可能构成内存页的“工作集”。 为了恢复VM的状态并恢复操作，在一些实施例中，（a）对VM的恢复到永久存储器的访问，恢复VM的设备状态，并将一组或多个活动存储器页面加载到 物理内存; （b）恢复虚拟机的运作; 和（c）从VM的保存状态的附加存储器页面在VM的操作已经恢复之后被加载到存储器中。

公开(公告)号：US20120089764A1

公开(公告)日：2012-04-12

申请号：US12900271

申请日：2010-10-07

申请人： Yury BASKAKOV ,  Alexander GARTHWAITE ,  Jesse POOL

发明人： Yury BASKAKOV ,  Alexander GARTHWAITE ,  Jesse POOL

IPC分类号： G06F12/10 ,  G06F12/00

CPC分类号： G06F3/061 ,  G06F3/065 ,  G06F3/0662 ,  G06F3/0673 ,  G06F12/10 ,  G06F2212/151 ,  G06F2212/65 ,  G06F2212/656

摘要： Updating contents of certain memory pages in a virtual machine system is deferred until they are needed. Specifically, certain page update operations are deferred until the page is accessed for a load or store operation. Each page within the virtual machine system includes associated metadata, which includes a page signature characterizing the contents of a corresponding page or a reference to a page with canonical contents, and a flag that indicates the page needs to be updated before being accessed. The metadata may also include a flag to indicate that a backing store of the memory page has contents of a known content class. When such a memory page is mapped to a shared page with contents of that known content class, a flag in the metadata to indicate that contents of the memory page needs to be updated is not set.

摘要翻译： 更新虚拟机系统中某些内存页的内容将被延迟，直到需要。 具体来说，某些页面更新操作将被延迟，直到访问页面以进行加载或存储操作。 虚拟机系统内的每个页面包括关联的元数据，其包括表征对应页面的内容的页面签名或具有规范内容的页面的引用，以及指示页面在被访问之前需要被更新的标志。 元数据还可以包括用于指示存储器页的后备存储具有已知内容类的内容的标志。 当这样的存储器页面被映射到具有该已知内容类的内容的共享页面时，不设置用于指示存储器页面的内容需要被更新的元数据中的标志。