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KS2012: The future of kernel regression tracking

KS2012: The future of kernel regression tracking

Posted Aug 29, 2012 23:22 UTC (Wed) by raven667 (subscriber, #5198)
In reply to: KS2012: The future of kernel regression tracking by dlang
Parent article: KS2012: The future of kernel regression tracking

Maybe this is just a different usage of the term "regression". In kernel-land a regression as you describe is where a change negatively affects performance in some unique scenario, Linux kernel developers take this seriously. For obvious functionality type regressions it would seem a test suite could, over time, test every code path.


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KS2012: The future of kernel regression tracking

Posted Aug 29, 2012 23:27 UTC (Wed) by dlang (subscriber, #313) [Link]

The problem is that many code paths will only be used with specific hardware, or in other specific conditions.

Plus, you need to remember that the kernel is multi-threaded, so timing of different things happening matters as well.

There are very few "obvious functionality" type regressions.


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