On Tue, Apr 11, 2006 at 10:47:16AM -0700, Raj, Ashok wrote: > > > > > * Patch to fix the CPU issue we discovered with the lhcs_regression > > testsuite has been validated to fix the issue. > > > > > Yes this patch is now included in mainline. Hi ashok, Thanks, I verified this is now working in mainline kernels. However I've noticed a new issue. I've been running my CPU hotplug regression test against recent -rc, -mm, and -git kernels, on a 2-cpu machine. But I notice that while cpu1 can be onlined/offlined, cpu0 cannot. This is because there is no 'online' file for cpu0: cl009 cpu # ls /sys/devices/system/cpu/cpu* /sys/devices/system/cpu/cpu0: topology /sys/devices/system/cpu/cpu1: online topology Why would I be seeing the online file only for cpu1? Is x86 incapable of offlining cpu0? Thanks, Bryce