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On Fri, 22 Jun 2007, Daniel Walker wrote: > > On Fri, 2007-06-22 at 22:40 +0200, Ingo Molnar wrote: > >> >> - tasklets have certain fairness limitations. (they are executed in >> softirq context and thus preempt everything, even if there is some >> potentially more important, high-priority task waiting to be >> executed.) > > Since -rt has been executing tasklets in process context for a long > time, I'm not sure this change would cause to many regressions. However, > it seems like implicit dependencies on "tasklets preempt everything" > might crop up. The other issue is if they don't "preempt > everything" (most of the time), what default priority do we give them > (all of the time)? It seems like Christoph's suggestion of converting > all the tasklets individually might be a better option, to deal with > specific pitfalls. that would be the safe way to do it, but it will take a lot of time and a lot of testing. it's probably better to try the big-bang change and only if you see problames go back and break things down. remember, these changes have been in use in -rt for a while. there's reason to believe that they aren't going to cause drastic problems. David Lang - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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