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    Faster computer memory access by reducing SLAT fragmentation
    31.
    发明授权
    Faster computer memory access by reducing SLAT fragmentation 有权

    公开(公告)号：US11573906B2

    公开(公告)日：2023-02-07

    申请号：US17157678

    申请日：2021-01-25

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Yevgeniy Bak ,  Mehmet Iyigun ,  Jonathan E. Lange

    IPC: G06F12/10 ,  G06F12/1009 ,  G06F9/455

    Abstract: To increase the speed with which a Second Layer Address Table (SLAT) is traversed, memory having the same access permissions is contiguously arranged such that one or more hierarchical levels of the SLAT need not be referenced, thereby resulting in more efficient SLAT traversal. “Slabs” of memory are established whose memory range is sufficiently large that reference to a hierarchically lower level table can be skipped and a hierarchically higher level table's entries can directly identify relevant memory addresses. Such slabs are aligned to avoid smaller intermediate memory ranges. The loading of code or data into memory is performed based on a next available memory location within a slab having equivalent access permissions, or, if such a slab is not available, or if an existing slab does not have a sufficient quantity of available memory remaining, a new slab with the proper access permissions is established.

    Shadow stack violation enforcement at module granularity
    32.
    发明授权
    Shadow stack violation enforcement at module granularity 有权

    公开(公告)号：US11379579B2

    公开(公告)日：2022-07-05

    申请号：US16828089

    申请日：2020-03-24

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Jason Lin ,  Jin Lin ,  Gregory John Colombo ,  Niraj Majmudar ,  Mehmet Iyigun ,  Shayne Daniel Hiet-Block ,  Kenneth Dean Johnson

    IPC: G06F21/00 ,  G06F21/54 ,  G06F9/445 ,  G06F9/48

    Abstract: Enforcing shadow stack violations at module granularity, rather than at thread or process granularity. An exception is processed during execution of a thread based on code of an application binary, which is enabled for shadow stack enforcement, that calls an external module. The exception results from a mismatch between a return address popped from the thread's call stack and a return address popped from the thread's shadow stack. Processing the exception includes determining that the exception resulted from execution of an instruction in the external module, and determining whether or not the external module is enabled for shadow stack enforcement. Based at least on these determinations, execution of the thread is terminated when the external module is enabled for shadow stack enforcement, or the thread is permitted to continue executing when the external module is not enabled for shadow stack enforcement.

    Shared memory in memory isolated partitions
    34.
    发明授权
    Shared memory in memory isolated partitions 有权

    公开(公告)号：US10908958B2

    公开(公告)日：2021-02-02

    申请号：US16361106

    申请日：2019-03-21

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Yevgeniy M. Bak ,  Mehmet Iyigun ,  Landy Wang

    IPC: G06F3/06 ,  G06F9/50

    Abstract: Multiple partitions can be run on a computing device, each partition running multiple processes referred to as a workload. Each of the multiple partitions, is isolated from one another, preventing the processes in each partition from interfering with the operation of the processes in the other partitions. Using the techniques discussed herein, some memory pages of a partition (referred to as a sharing partition) can be shared with one or more other partitions. The pages that are shared are file backed (e.g., image or data files) or pagefile backed memory pages. The sharing partition can be, for example, a separate partition that is dedicated to sharing memory pages.

    Shared memory in memory isolated partitions
    36.
    发明授权
    Shared memory in memory isolated partitions 有权

    公开(公告)号：US10275169B2

    公开(公告)日：2019-04-30

    申请号：US15409267

    申请日：2017-01-18

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Yevgeniy M. Bak ,  Mehmet Iyigun ,  Landy Wang

    IPC: G06F3/06

    Abstract: Multiple partitions can be run on a computing device, each partition running multiple processes referred to as a workload. Each of the multiple partitions, is isolated from one another, preventing the processes in each partition from interfering with the operation of the processes in the other partitions. Using the techniques discussed herein, some memory pages of a partition (referred to as a sharing partition) can be shared with one or more other partitions. The pages that are shared are file backed (e.g., image or data files) or pagefile backed memory pages. The sharing partition can be, for example, a separate partition that is dedicated to sharing memory pages.

    Fast computer startup
    37.
    发明授权
    Fast computer startup 有权

    公开(公告)号：US10268487B2

    公开(公告)日：2019-04-23

    申请号：US15214383

    申请日：2016-07-19

    Applicant: MICROSOFT TECHNOLOGY LICENSING, LLC

    Inventor： Mehmet Iyigun ,  Yevgeniy Bak ,  Emily N. Wilson ,  Kirsten V. Stark ,  Sushu Zhang ,  Patrick L. Stemen ,  Brian E. King ,  Vasilios Karagounis ,  Neel Jain

    IPC: G06F1/32 ,  G06F9/4401

    Abstract: Fast computer startup is provided by, upon receipt of a shutdown command, recording state information representing a target state. In this target state, the computing device may have closed all user sessions, such that no user state information is included in the target state. However, the operating system may still be executing. In response to a command to startup the computer, this target state may be quickly reestablished from the recorded target state information. Portions of a startup sequence may be performed to complete the startup process, including establishing user state. To protect user expectations despite changes in response to a shutdown command, creation and use of the file holding the recorded state information may be conditional on dynamically determined events. Also, user and programmatic interfaces may provide options to override creation or use of the recorded state information.

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