On Monday 18 May 2009 10:16:46 pm Ben Kelly wrote: > On May 18, 2009, at 11:29 AM, John Baldwin wrote: > > On Saturday 16 May 2009 12:40:44 pm Ben Kelly wrote: > >> 1) It changes the kproc(9) API by adding a kproc_create_priority() > >> function that allows you to set the priority of the newly created > >> thread. I'm not sure how people feel about this. > > > > Actually, I almost think we should just add a priority argument to > > each of the > > routines that creates a new kthread/kproc. Perhaps allow a priority > > of 0 to > > let the thread run with the default priority. Hmm, it looks like > > kthreads > > default to running with whatever thread0 runs at (PVM) which is > > probably not > > really ideal. Having an explicit priority for every kthread would > > probably > > be best. Most kthreads should probably be at PZERO by default I > > think. > > If this approach was taken would it make sense to use a flag to > indicate "use the specified priority" since 0 is a valid priority value? Well, 0 isn't truly valid (it's sort of reserved I guess), and we already use 0 for tsleep() to mean "don't change my priority". However, I would almost be inclined to just KASSERT() that the priority argument is not 0 and require each place that creates a kthread to explicitly set the new thread's priority. -- John BaldwinReceived on Tue May 19 2009 - 11:35:29 UTC
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