Linux in mixed-criticality systems [LWN.net]

Linux in mixed-criticality systems

Posted Dec 14, 2018 16:54 UTC (Fri) by smurf (subscriber, #17840)
In reply to: Linux in mixed-criticality systems by marcH
Parent article: Linux in mixed-criticality systems

> Cars used to be certified and pretty safe before micro controllers

Yeah, but that was before brake assistants and airbags and automatic transmissions and mandatory seatbelt warnings and central locks and theft protection and whatnot. All of these, and more, either require µCs outright or are more expensive if you build them without one.

Today? No way. Even less way if you want a car that doesn't burn gasoline.

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Linux in mixed-criticality systems

Posted Dec 14, 2018 17:33 UTC (Fri) by marcH (subscriber, #57642) [Link] (2 responses)

mandatory != safety critical

Central locks and rear cameras are "real-time" (for some definition of it) but really not safety critical.

Linux in mixed-criticality systems

Posted Dec 20, 2018 6:26 UTC (Thu) by JdGordy (subscriber, #70103) [Link] (1 responses)

pretty sure there is a requirement for rear cameras to turn on within ~2s of power, and quite likely there is actual safety critical requirements on central locking (if fitted obviously) around how they work in accidents

Linux in mixed-criticality systems

Posted Dec 20, 2018 6:39 UTC (Thu) by marcH (subscriber, #57642) [Link]

My car doesn't have a rear camera, so it must be critically unsafe.

Check what it takes to open a damaged car door.

ABS when fitted is a good example considering its job is to ... release the brakes. Cruise control and any other sort of self driving feature are other obvious ones. Can't wait for the fun of seeing these interact with security holes and other bugs in the media player. As usual the only winners will be the lawyers.