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LPI

What Everybody Knows About You: Your Car

This article is part of a continuing series about data collection today. The previous article talked about devices in your home. Modern cars are probably the most intensive conglomerations of computing power we have in day-to-day life. Estimates of the ... Read more The post What Everybody Knows About You: Your Car appeared first on Linux Professional Institute (LPI).

OMG! Ubuntu

New Raspberry Pi 4 models splits RAM across dual chips

A new version of the Raspberry Pi 4 Model B has been (quietly) introduced. The key difference? It now uses a dual-RAM configuration. The Raspberry Pi 4 Model B Rev 1.5 adopts a dual-RAM configuration to ‘improve supply chain flexibility’ and manufacturing efficiency, per a company product change notice document. Earlier versions of the Raspberry Pi 4 (v1.1 through 1.4) use a single RAM chip on the top of the board. This new revision adds a second LPDDR4 chip to the underside, with some passive components also moved over. Why use dual-RAM? Even those living under rocks will know that […]

LWN.net

[$] Modernizing swapping: the end of the swap map

The first installment in this series introduced several data structures in the kernel's swap subsystem and described work to replace some of those with a new "swap table" structure. The work did not stop there, though; there is more modernization of the swap subsystem queued for an upcoming development cycle, and even more for multiple kernel releases after that. Once that work is done, the swap subsystem will be both simpler and faster than it is now.