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Wednesday, October 7 • 11:30 - 12:20
Supporting Large NVM Storage in Linux - Keith Packard, HP

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Direct load-store access to large amounts of storage provides an
opportunity for significant shifts in computing capacity. However,
current processors offer only 48 bits of virtual addressing and no
more than 48 bits of physical address.

HP is designing a system, called 'The Machine', that goes beyond these
lximits. It provides an additional address translation layer, the
Aperture/Descriptor Unit (ADU), within the NVM interface that
dynamically maps chunks of global NVM into the processor physical
address space.

This presentation will describe the hardware and the Linux kernel
changes necessary to efficiently support this hardware. The talk will

* Changes in DAX to handle ephemeral physical addresses
* CPU cache flushing on ADU mapping changes
* Selecting ADU mapping sizes to balance cache flushing costs


Keith Packard

Distinguished Linux Technologist, HP
Keith Packard has been developing free software since 1986, working on the X Window System, the Linux kernel and rocketry electronics. He is currently a Distinguished Linux Technologist at HP working as the Chief Architect for Linux on The Machine. Keith received a Usenix Lifetime... Read More →

Wednesday October 7, 2015 11:30 - 12:20
Liffey Meeting 1

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