Invention Application
- Patent Title: EFFICIENTLY PURGING NON-ACTIVE BLOCKS IN NVM REGIONS USING POINTER ELIMINATION
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Application No.: US16174264Application Date: 2018-10-29
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Publication No.: US20200133846A1Publication Date: 2020-04-30
- Inventor: Kiran Tati , Xavier Deguillard , Ishan Banerjee , Julien Freche , Preeti Agarwal , Rajesh Venkatasubramanian
- Applicant: VMware, Inc.
- Main IPC: G06F12/02
- IPC: G06F12/02 ; G06F12/0804

Abstract:
Techniques for efficiently purging non-active blocks in an NVM region of an NVM device using pointer elimination are provided. In one set of embodiments, a host system can, for each level 1 (L1) page table entry of each snapshot of the NVM region, determine whether a data block of the NVM region that is pointed to by the L1 page table entry is a non-active block, and if the data block is a non-active block, remove a pointer to the data block in the L1 page table entry and reduce a reference count parameter associated with the data block by 1. If the reference count parameter has reached zero at this point, the host system purge the data block from the NVM device to the mass storage device.
Public/Granted literature
- US10691591B2 Efficiently purging non-active blocks in NVM regions using pointer elimination Public/Granted day:2020-06-23
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