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Thursday, May 27 • 18:00 - 18:30
Live-update: State of Art - Julien Grall & Hongyan Xia, Amazon Web Services

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Administrators often require updating the Xen hypervisor to address security vulnerabilities, introduce new features, or fix software defects. Traditionally, updating the Xen hypervisor requires rebooting the host, which entails disrupting running guests. Live update is the mechanism to streamline Xen updates while keeping guests' disruption to a minimum. AWS outlined the live update operation in the 2019 Xen Summit. At a high-level, (i) the target Xen hypervisor is loaded in RAM, (ii) the source (i.e., currently running) Xen serializes its state, and finally, (iii) the source Xen transfers control to the target, which in turn becomes the authoritative hypervisor for the host. The talk will cover current design, project status, and technical challenges (e.g., non-stable ABI across Xen versions). The talk will also present a demo of the live update operation.
Speakers
avatar for Hongyan Xia

Hongyan Xia

Kernel/Hypervisor Engineer, AWS
Hongyan Xia is a Kernel/Hypervisor Engineer in the Amazon UK Cambridge EC2 team, working on the Secret-Free Hypervisor and Xen Live Update projects. Before joining Amazon, he obtained his PhD from the University of Cambridge, and worked on the Cambridge CHERI platform as well as the... Read More →
avatar for Julien Grall

Julien Grall

Xen maintainer, Amazon Web Services
Julien Grall is an kernel/hypervisor engineer in the Amazon EC2 team. He is currently working on adding support for live updating the Xen hypervisor. Julien has been involved in Xen community since 2012. Today he is a Xen Project committer, and he maintains Xen on Arm.

XDS21 xen liveupdate (1) pdf
Thursday May 27, 2021 18:00 - 18:30 CEST
Nanjing
  Breakout Session
  • Presentation Slides Attached Yes