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Friday, October 30 • 16:30 - 17:00
Long Live Asynchronous Page Fault! - Vitaly Kuznetsov & Vivek Goyal, Red Hat

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Asynchronous Page Fault mechanism for KVM guests is not new, it's been around for more than a decade. Recently virtio-fs developers made an attempt to add new features to it and his attracted the attention of kernel developers to the internals. Some flaws in the original design of asynchronous page fault on x86 architecture were revealed, these flaws currently block addition of the new features. There is, however, an ongoing work aimed at fixing these issues. In this talk we'll try to cover asynchronous page fault mechanism: what is it needed for and how it works, both in 'normal' and 'nested' virtualization scenarios. We'll explain what potential issues were recently revealed and how we're fixing them. We'll describe new use-cases and features, both in-development and waiting to be implemented.

avatar for Vitaly Kuznetsov

Vitaly Kuznetsov

Principal Software Engineer, Red Hat
Vitaly works at Virtualization Engineering team at Red Hat focusing on KVM development as well as making Linux the best guest for other hypervisors. He frequently presents at FOSDEM, KVM Forum, DevConf and other technical conferences.

Vivek Goyal

Senior Principal Software Engineer, Red Hat
Vivek is a member of kernel storage team at Red Hat and has worked in various areas like Virtio FS, overlayfs SELinux support, docker storage, block cgroup controller, IO scheduler, kexec/kdump and secureboot. He frequently presents at LSF/MM, Linux plumbers and other technical c... Read More →

Friday October 30, 2020 16:30 - 17:00 GMT
KVM Theater
  KVM Forum, KVM