On Sun, Dec 10, 2006 at 03:18:38PM +0100, Rafael J. Wysocki wrote: > On Sunday, 10 December 2006 13:16, Andrew Morton wrote: > > On Sun, 10 Dec 2006 12:49:43 +0100 > > Hm, currently we're using the CPU hotplug to disable the nonboot CPUs before > the freezer is called. ;-) > > However, we're now trying to make the freezer SMP-safe, so that we can disable > the nonboot CPUs after devices have been suspended (we want to do this for > some ACPI-related reasons). In fact we're almost there, I'm only waiting for > the confirmation from Pavel to post the patches. > > When this is done, we won't need the CPU hotplug that much and I think the CPU > hotplug code will be able to do something like: > > freeze_processes > suspend_cpufreq (or even suspend_all_devices) > remove_the_CPU_in_question > resume_cpufreq > thaw_processes
Have you thought about how much time this might take on a machine with say - 128 CPUs of which I want to dynamically reconvigure 64 of them and make a new partition ? Assume 10,000 tasks are running in the system. Thanks Dipankar - 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/