Hi Daniel, On 06/18/2012 01:48 AM, Daniel Lezcano wrote: > On 06/15/2012 05:28 PM, Daniel Lezcano wrote: >> >> Hi all, >> >> I have a dual core Intel T9500. >> >> I boot the cpu with the acpi_idle driver and intel_idle enabled in the >> config. >> >> The kernel is booted with maxcpus=1. >> >> After the system has boot, I put cpu1 online via sysfs. >> >> But I don't see any 'cpuidle' directory in the cpu's sysfs entry: >> >> /sys/devices/system/cpu/cpu1/cpuidle (?) >> >> When I look at the code I see the notifier is present for hotplug in >> processor_driver.c and the cpuidle intel init routine should be called >> there. >> Yes, we have a hotplug notifier. Commit 99b72508 by Thomas Renninger fixed this issue. Please let me know which kernel version you are running and what is idle driver registered ? >> I am wondering is it a bug or an expected behavior ? > > Any thoughts on that ? > > Thanks > -- Daniel > > Cheers Deepthi