Hi. On Mon, 2005-08-08 at 12:44, Srivatsa Vaddagiri wrote: > On Mon, Aug 08, 2005 at 11:30:23AM +1000, Con Kolivas wrote: > > Tony said he had it lying around somewhere and needed to find time to dust > > it > > off and get it up to speed. > > PPC64 is on my ToDo list as well. Will take it up after the dyn-tick is > cleaned > up for SMP.
An SMP related area you might want to look at (if you haven't already) is hotplug cpu support. There seems to be some interaction between dynticks and hotplug that prevents a CPU from getting to set its state to CPU_DEAD (despite being in the idle function), while the thread seeking to down it sits in __cpu_die waiting. I observed the issue while testing Suspend2 - about 1 in 5 resumes would lock solid or have a big delay at resume time (never when suspending, interestingly). Turning off dynticks allowed me to do 15 successful resumes on the trot. Regards. Nigel -- Evolution. Enumerate the requirements. Consider the interdependencies. Calculate the probabilities. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
