公开(公告)号：US11586371B2

公开(公告)日：2023-02-21

申请号：US17384382

申请日：2021-07-23

Applicant: VMware, Inc.

Inventor： Yury Baskakov ,  Ying Yu ,  Anurekh Saxena ,  Arunachalam Ramanathan ,  Frederick Joseph Jacobs ,  Giritharan Rashiyamany

IPC: G06F12/1009 ,  G06F3/06 ,  G06F9/455 ,  G06F12/109

Abstract: A method of populating page tables of an executing workload during migration of the executing workload from a source host to a destination host includes the steps of: before resuming the workload at the destination host, populating the page tables of the workload at the destination host, wherein the populating comprises inserting mappings from virtual addresses of the workload to physical addresses of system memory of the destination host; and upon completion of populating the page tables, resuming the workload at the destination host.

公开(公告)号：US20220027231A1

公开(公告)日：2022-01-27

申请号：US17494826

申请日：2021-10-05

Applicant: VMware, Inc.

Inventor： Sowgandh Sunil Gadi ,  Rajesh Venkatasubramanian ,  Venkata Subhash Reddy Peddamallu ,  Arunachalam Ramanathan ,  Timothy P Mann ,  Frederick Joseph Jacobs

IPC: G06F11/07 ,  G06F9/455

Abstract: Techniques for migrating virtual machines (VMs) in the presence of uncorrectable memory errors are provided. According to one set of embodiments, a source host hypervisor of a source host system can determine, for each guest memory page of a VM to be migrated from the source host system to a destination host system, whether the guest memory page is impacted by an uncorrectable memory error in a byte-addressable memory of the source host system. If the source host hypervisor determines that the guest memory page is impacted, the source host hypervisor can transmit a data packet to a destination host hypervisor of the destination host system that includes error metadata identifying the guest memory page as being corrupted. Alternatively, if the source host hypervisor determines that the guest memory page is not impacted, the source host hypervisor can attempt to read the guest memory page from the byte-addressable memory in a memory exception-safe manner.

公开(公告)号：US11169870B2

公开(公告)日：2021-11-09

申请号：US16743895

申请日：2020-01-15

Applicant: VMware, Inc.

Inventor： Sowgandh Sunil Gadi ,  Rajesh Venkatasubramanian ,  Venkata Subhash Reddy Peddamallu ,  Arunachalam Ramanathan ,  Timothy P. Mann ,  Frederick Joseph Jacobs

IPC: G06F11/07 ,  G06F9/455

Abstract: Techniques for migrating virtual machines (VMs) in the presence of uncorrectable memory errors are provided. According to one set of embodiments, a source host hypervisor of a source host system can determine, for each guest memory page of a VM to be migrated from the source host system to a destination host system, whether the guest memory page is impacted by an uncorrectable memory error in a byte-addressable memory of the source host system. If the source host hypervisor determines that the guest memory page is impacted, the source host hypervisor can transmit a data packet to a destination host hypervisor of the destination host system that includes error metadata identifying the guest memory page as being corrupted. Alternatively, if the source host hypervisor determines that the guest memory page is not impacted, the source host hypervisor can attempt to read the guest memory page from the byte-addressable memory in a memory exception-safe manner.

公开(公告)号：US10908912B1

公开(公告)日：2021-02-02

申请号：US16521407

申请日：2019-07-24

Applicant: VMware, Inc.

Inventor： Nadav Amit ,  Frederick Joseph Jacobs ,  Michael Wei

IPC: G06F9/38 ,  G06F9/30

Abstract: A method for redirecting an indirect call in an operating system kernel to a direct call is disclosed. The direct calls are contained in trampoline code called an inline jump switch (IJS) or an outline jump switch (OJS). The IJS and OJS can operate in either a use mode, redirecting an indirect call to a direct call, a learning and update mode or fallback mode. In the learning and update mode, target addresses in a trampoline code template are learned and updated by a jump switch worker thread that periodically runs as a kernel process. When building the kernel binary, a plug-in is integrated into the kernel. The plug-in replaces call sites with a trampoline code template containing a direct call so that the template can be later updated by the jump switch worker thread.