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公开(公告)号：US11782828B2
公开(公告)日：2023-10-10
申请号：US17571417
申请日：2022-01-07
Applicant: VMware, Inc.
Inventor： Xavier Deguillard , Ishan Banerjee , Julien Freche , Kiran Tati , Preeti Agarwal , Rajesh Venkatasubramanian
IPC: G06F12/00 , G06F12/02 , G06F12/1009 , G06F12/0804
CPC classification number: G06F12/0253 , G06F12/0804 , G06F12/1009 , G06F2212/1044 , G06F2212/202 , G06F2212/657
Abstract: Techniques for efficiently purging non-active blocks in an NVM region of an NVM device using virtblocks are provided. In one set of embodiments, a host system can maintain, in the NVM device, a pointer entry (i.e., virtblock entry) for each allocated data block of the NVM region, where page table entries of the NVM region that refer to the allocated data block include pointers to the pointer entry, and where the pointer entry includes a pointer to the allocated data block. The host system can further determine that a subset of the allocated data blocks of the NVM region are non-active blocks and can purge the non-active blocks from the NVM device to a mass storage device, where the purging comprises updating the pointer entry for each non-active block to point to a storage location of the non-active block on the mass storage device.
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公开(公告)号：US20230025699A1
公开(公告)日：2023-01-26
申请号：US17530500
申请日：2021-11-19
Applicant: VMWARE, INC.
Inventor： KIRAN TATI , Preeti Agarwal , Ishan Banerjee , Rajesh Venkatasubramanian , Ashish Kaila , Halesh Sadashiv , Valeriy Zhuravlev
IPC: G06F9/455
Abstract: Techniques that enable a hypervisor to (1) maintain shared memory pages and (2) handle memory accounting for VMs that are suspended to and resumed from the volatile memory of a host system are provided. Regarding (1), the hypervisor can maintain shared memory pages in volatile memory across the suspend-to-memory and resume-from-memory operations, without having to save their reference counts. Regarding (2), the hypervisor can keep track of the volatile memory reserved and consumed by VMs as they are suspended and resumed, without erroneously double counting that memory.
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公开(公告)号：US20220334774A1
公开(公告)日：2022-10-20
申请号：US17371704
申请日：2021-07-09
Applicant: VMware, Inc.
Inventor： Emmanuel Amaro Ramirez , Marcos Kawazoe Aguilera , Pratap Subrahmanyam , Rajesh Venkatasubramanian
IPC: G06F3/06
Abstract: Disclosed are various approaches for decreasing the latency involved in reading pages from swap devices. These approaches can include setting a first queue in the plurality of queues as a highest priority queue and a second queue in the plurality of queues as a low priority queue. Then, an input/output (I/O) request for an address in memory can be received. The type of the I/O request can be determined, and then the I/O request can be assigned to the first queue or the second queue of the swap device based at least in part on the type of the I/O request
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公开(公告)号：US11436112B1
公开(公告)日：2022-09-06
申请号：US17321673
申请日：2021-05-17
Applicant: VMware, Inc.
Inventor： Keerthi Kumar , Halesh Sadashiv , Sairam Veeraswamy , Rajesh Venkatasubramanian , Kiran Dikshit , Kiran Tati
IPC: G06F11/00 , G06F11/20 , G06F15/173
Abstract: Techniques for implementing RDMA-based recovery of dirty data in remote memory are provided. In one set of embodiments, upon occurrence of a failure at a first (i.e., source) host system, a second (i.e., failover) host system can allocate a new memory region corresponding to a memory region of the source host system and retrieve a baseline copy of the memory region from a storage backend shared by the source and failover host systems. The failover host system can further populate the new memory region with the baseline copy and retrieve one or more dirty page lists for the memory region from the source host system via RDMA, where the one or more dirty page lists identify memory pages in the memory region that include data updates not present in the baseline copy. For each memory page identified in the one or more dirty page lists, the failover host system can then copy the content of that memory page from the memory region of the source host system to the new memory region via RDMA.
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公开(公告)号：US20220229781A1
公开(公告)日：2022-07-21
申请号：US17154411
申请日：2021-01-21
Applicant: VMware, Inc.
Inventor： Tobias Stumpf , Ashish Kaila , Mukund Gunti , Rajesh Venkatasubramanian
IPC: G06F12/1009 , G06F12/1027 , G06F12/0875 , G06F11/14
Abstract: Examples described herein include systems and methods for retaining information about bad memory pages across an operating system reboot. An example method includes detecting, by a first instance of an operating system, an error in a memory page of a non-transitory storage medium of a computing device executing the operating system. The operating system can tag the memory page as a bad memory page, indicating that the memory page should not be used by the operating system. The operating system can also store tag information indicating memory pages of the storage medium that are tagged as bad memory pages. The example method can also include receiving an instruction to reboot the operating system, booting a second instance of the operating system, and providing the tag information to the second instance of the operating system. The operating system can use the tag information to avoid using the bad memory pages.
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Patent Agency Ranking
公开(公告)号：US11249900B2
公开(公告)日：2022-02-15
申请号：US16174249
申请日：2018-10-29
Applicant: VMware, Inc.
Inventor： Xavier Deguillard , Ishan Banerjee , Julien Freche , Kiran Tati , Preeti Agarwal , Rajesh Venkatasubramanian
IPC: G06F12/00 , G06F12/02 , G06F12/1009 , G06F12/0804
Abstract: Techniques for efficiently purging non-active blocks in an NVM region of an NVM device using virtblocks are provided. In one set of embodiments, a host system can maintain, in the NVM device, a pointer entry (i.e., virtblock entry) for each allocated data block of the NVM region, where page table entries of the NVM region that refer to the allocated data block include pointers to the pointer entry, and where the pointer entry includes a pointer to the allocated data block. The host system can further determine that a subset of the allocated data blocks of the NVM region are non-active blocks and can purge the non-active blocks from the NVM device to a mass storage device, where the purging comprises updating the pointer entry for each non-active block to point to a storage location of the non-active block on the mass storage device.
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7.发明申请公开(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
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.
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公开(公告)号：US11182196B2
公开(公告)日：2021-11-23
申请号：US16681990
申请日：2019-11-13
Applicant: VMware, Inc.
Inventor： Sahan Gamage , Benjamin J. Corrie , Adrian Drzewiecki , Pranshu Jain , Mark Johnson , Zhelong Pan , Rajesh Venkatasubramanian
Abstract: Various aspects are disclosed for unified resource management of containers and virtual machines. A podVM resource configuration for a pod virtual machine (podVM) is determined using container configurations. The podVM comprising a virtual machine (VM) that provides resource isolation for a pod based on the podVM resource configuration. A host selection for the podVM is received from a VM scheduler. The host selection identifies hardware resources for the podVM. A container scheduler is limited to bind the podVM to a node corresponding to the hardware resources of the host selection from the VM scheduler. The podVM is created in a host corresponding to the host selection. Containers are started within the podVM. The containers correspond to the container configurations.
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9.发明授权公开(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
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.
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10.发明授权公开(公告)号：US10929233B2
公开(公告)日：2021-02-23
申请号：US15881379
申请日：2018-01-26
Applicant: VMware, Inc.
Inventor： Pratap Subrahmanyam , Rajesh Venkatasubramanian , Kiran Tati , Qasim Ali , Marcos Aguilera , Irina Calciu , Venkata Subhash Reddy Peddamallu , Xavier Deguillard , Yi Yao
Abstract: Techniques for achieving application high availability via application-transparent battery-backed replication of persistent data are provided. In one set of embodiments, a computer system can detect a failure that causes an application of the computer system to stop running. In response to detecting the failure, the computer system can copy persistent data written by the application and maintained locally at the computer system to one or more remote destinations, where the copying is performed in a manner that is transparent to the application and while the computer system runs on battery power. The application can then be restarted on another computer system using the copied data.
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