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KS2009: Realtime preemption

KS2009: Realtime preemption

Posted Oct 21, 2009 6:29 UTC (Wed) by dlang (subscriber, #313)
Parent article: KS2009: Realtime preemption

I like the idea of CONFIG_BKL being required for older drivers and not trying too hard to fix them (especially since the people doing the changes probably don't have the hardware to test with)


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KS2009: Realtime preemption

Posted Oct 29, 2009 20:15 UTC (Thu) by joib (subscriber, #8541) [Link]

Then again, due to all the subtleness in the BKL (e.g. http://lwn.net/Articles/283066/ ), it wouldn't surprise me if many of these drivers would then be broken anyway, since they could depend on some other piece of code acquiring the BKL at some suitable point.

Anyway, I suppose that's the price of progress. One can at least hope that in the longer term, the elimination of the BKL will not only improve latencies and corner-case scalability, but also quality as the replacement locking will be better designed and understood.


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