------------[ cut here ]------------ WARNING: at /build/buildd/linux-2.6.35/arch/x86/include/asm/processor.h:1005 read_measured_perf_ctrs+0x6c/0x80() Hardware name: 1000H Modules linked in: aes_i586 aes_generic binfmt_misc rfcomm parport_pc ppdev sco bnep l2cap snd_hda_codec_realtek joydev arc4 iwlagn snd_hda_intel snd_hda_codec snd_hwdep i915 snd_pcm snd_seq_midi iwlcore snd_rawmidi drm_kms_helper mac80211 snd_seq_midi_event snd_seq drm snd_timer snd_seq_device btusb uvcvideo eeepc_wmi sparse_keymap cfg80211 bluetooth psmouse videodev v4l1_compat intel_agp snd led_class soundcore i2c_algo_bit serio_raw video agpgart snd_page_alloc output lp parport atl1e Pid: 60, comm: kondemand/0 Not tainted 2.6.35-15-generic #21-Ubuntu Call Trace: [] warn_slowpath_common+0x72/0xa0 [] ? read_measured_perf_ctrs+0x6c/0x80 [] ? read_measured_perf_ctrs+0x6c/0x80 [] ? read_measured_perf_ctrs+0x0/0x80 [] warn_slowpath_null+0x22/0x30 [] read_measured_perf_ctrs+0x6c/0x80 [] ? read_measured_perf_ctrs+0x0/0x80 [] smp_call_function_single+0x72/0x130 [] cpufreq_get_measured_perf+0x2f/0xd0 [] ? cpufreq_cpu_get+0x8e/0xf0 [] ? get_cpu_iowait_time_us+0x6a/0xa0 [] __cpufreq_driver_getavg+0x6a/0x70 [] dbs_check_cpu+0x75/0x2e0 [] do_dbs_timer+0xa7/0xc0 [] ? schedule+0x37a/0x7a0 [] run_workqueue+0x8e/0x150 [] ? do_dbs_timer+0x0/0xc0 [] worker_thread+0x84/0xe0 [] ? autoremove_wake_function+0x0/0x50 [] ? worker_thread+0x0/0xe0 [] kthread+0x74/0x80 [] ? kthread+0x0/0x80 [] kernel_thread_helper+0x6/0x10 ---[ end trace 6f39192c80a7223d ]---