On Tue, Apr 9, 2013 at 6:51 PM, Viresh Kumar wrote: > On 9 April 2013 21:38, Sedat Dilek wrote: >> With x=3 the system gets in an unuseable state. >> >> root# echo 0 > /sys/devices/system/cpu/cpu3/online >> >> I could not write my reply and had to do a hard/cold reboot. >> The dmesg log I saw looked similiar to my digicam-shot. > > Few things i need from you. First is output of cpufreq-info. Then > all the steps you did to reproduce above? Removed any other cpus? > > I am not able to find next-20130326 tag in my repo, only have 23 and 28. > Can you debug it a bit to find exact line of code causing this issue using > objdump? > > HINT: Documentation/BUG-HUNTING.. > > Give me line numbers of both of these functions: __cpufreq_governor() and > __cpufreq_remove_dev(). I have recompiled next-20130326 and the REGRESSION is still reproducible. Attached are my dmesg, kernel-config, tarball of my drivers/cpufreq build-dir, objdump of cpufreq_governor.o and the list of my current amd64-toolchain. Hope this helps you! Regards, - Sedat -