[ 90.531089] BUG: using smp_processor_id() in preemptible [00000000]
code: ondemand/4323
[ 90.531100] caller is nr_iowait_cpu+0x15/0x2c
[ 90.531106] Pid: 4323, comm: ondemand Tainted: G W
2.6.35-rc2-git1 #8
[ 90.531109] Call Trace:
[ 90.531118] [<ffffffff811c6c20>] debug_smp_processor_id+0xc4/0xe0
[ 90.531125] [<ffffffff8102a4c3>] nr_iowait_cpu+0x15/0x2c
[ 90.531132] [<ffffffff81061c1f>] update_ts_time_stats+0x37/0x72
[ 90.531140] [<ffffffff813c8388>] ? mutex_unlock+0x9/0xb
[ 90.531146] [<ffffffff8105d408>] ? ktime_get+0x60/0xb9
[ 90.531151] [<ffffffff81061dec>] get_cpu_idle_time_us+0x44/0x63
[ 90.531160] [<ffffffffa002c478>] get_cpu_idle_time+0x1c/0xa4
[cpufreq_ondemand]
[ 90.531168] [<ffffffffa002cc1c>] cpufreq_governor_dbs+0xcc/0x35c
[cpufreq_ondemand]
[ 90.531175] [<ffffffff8132dfed>] __cpufreq_governor+0x5d/0xa3
[ 90.531181] [<ffffffff8132ed87>] __cpufreq_set_policy+0x1a8/0x222
[ 90.531187] [<ffffffff8132f265>] store_scaling_governor+0x19f/0x1ed
[ 90.531194] [<ffffffff8132f535>] ? handle_update+0x0/0x33
[ 90.531201] [<ffffffff813c8c97>] ? down_write+0x3f/0x62
[ 90.531207] [<ffffffff813c9c00>] ? _raw_spin_trylock+0x39/0x81
[ 90.531212] [<ffffffff8132ebbd>] store+0x56/0x78
[ 90.531220] [<ffffffff81131302>] sysfs_write_file+0x103/0x13f
[ 90.531228] [<ffffffff810d9072>] vfs_write+0xa5/0xe2
[ 90.531234] [<ffffffff810d9e51>] ? fget_light+0x35/0x96
[ 90.531240] [<ffffffff810d9165>] sys_write+0x45/0x69
[ 90.531247] [<ffffffff810022ab>] system_call_fastpath+0x16/0x1b
On Mon, Jun 07, 2010 at 03:02:58PM -0400, Miles Lane wrote:
> [ 90.531089] BUG: using smp_processor_id() in preemptible [00000000]
> code: ondemand/4323
> [ 90.531100] caller is nr_iowait_cpu+0x15/0x2c
> [ 90.531106] Pid: 4323, comm: ondemand Tainted: G W
arjan is looking into this.
probably just needs some preempt disable/enable calls.
Dave