A question that comes to mind every time I go through the settings for "Preemption Model" and "Preempt The Big Kernel Lock".
Do each of the combinations "make sense", or are some "no-ops"? For model, we have 1) no forced (server), 2) Voluntary (Desktop) 3) preemptible (low-latency Desktop), and for Big Lock Preemption (BLP), we have "yes" or "no". Questions: 1) What is the difference between "no forced" and "voluntary"? Doesn't voluntary normally mean "not forced"? 2) If a process is not preemptible, then it seems this would be "doubly so" in the kernel when the big-lock is held. So does the big-lock preemption question have any effect (when preempt-model="no forced"). 3) If a process is "fully preemptible" but "BLP=false", is that much different than "voluntary preemption" & BLP=false? I.e. -- should 'preemptible kernel' also imply "BLP=true"...i.e. _Should_ (would?) the following change be "somewhat" identical to current config options: O1) "Preempt Model"="no-forced preemption" (would set preempt-big-kern-lock to FALSE and doesn't display that question). O2) "Voluntary Preemption" (presuming there are voluntary preemption points in the kernel in places where the big-K-lock is held), then configuration would still ask whether to "Preempt The Big Kernel Lock". O3) "Preemptible model"="allow-kernel-preemption" (would set preempt-big-kern-lock to TRUE and doesn't display that question). -- 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/
