Damn! Sorry, I have found the following fix at cpufreq ML from Dmitry Monakhov [1]. I will try it and report. - Sedat - [1] "[PATCH] cpufreq: call nr_iowait_cpu with disabled preemption" http://www.spinics.net/lists/cpufreq/msg01631.html On Mon, May 31, 2010 at 8:27 AM, Sedat Dilek <sedat.dilek@xxxxxxxxxxxxxx> wrote: > Hi, > > with 2.6.35-rc1 I get a cpufreq-related Call trace on startup on a > 32-bit Debian/sid system. > > Below I added (see investigations at the end): > > 1. the version of cpufrequtils I am using > 2. an output of cpufreq-related loaded kernel-modules > 3. an output of cpufreq-related setting in kernel-config > > Furthermore, I have attched the full dmesg output and kernel-config file. > > Here is the Call trace: > > [ 31.647049] BUG: using smp_processor_id() in preemptible [00000000] > code: cpufreq-set/2344 > [ 31.647299] caller is nr_iowait_cpu+0xb/0x1a > [ 31.647303] Pid: 2344, comm: cpufreq-set Not tainted > 2.6.35-rc1-iniza-686-kms #1 > [ 31.647306] Call Trace: > [ 31.647314] [<c111fdd9>] ? debug_smp_processor_id+0xa5/0xb8 > [ 31.647319] [<c1022f93>] ? nr_iowait_cpu+0xb/0x1a > [ 31.647325] [<c104a93c>] ? update_ts_time_stats+0x36/0x92 > [ 31.647329] [<c1045fcb>] ? ktime_get+0x5b/0xd9 > [ 31.647333] [<c104aae9>] ? get_cpu_idle_time_us+0x36/0x62 > [ 31.647340] [<f94e433d>] ? get_cpu_idle_time+0x12/0x127 [cpufreq_ondemand] > [ 31.647345] [<c10dea11>] ? sysfs_add_file_mode+0x48/0x66 > [ 31.647350] [<c10e0827>] ? internal_create_group+0xcf/0x134 > [ 31.647355] [<f94e4a3b>] ? cpufreq_governor_dbs+0xaa/0x2a3 > [cpufreq_ondemand] > [ 31.647361] [<c119d94a>] ? __cpufreq_governor+0x2c/0x63 > [ 31.647365] [<c119e80a>] ? __cpufreq_set_policy+0xea/0x11d > [ 31.647370] [<c119ea74>] ? store_scaling_governor+0x58/0x7c > [ 31.647375] [<c119ee09>] ? handle_update+0x0/0x8 > [ 31.647381] [<c1225d70>] ? _raw_spin_unlock_irqrestore+0x22/0x2c > [ 31.647385] [<c119ea1c>] ? store_scaling_governor+0x0/0x7c > [ 31.647389] [<c119e708>] ? store+0x3c/0x54 > [ 31.647393] [<c10de76d>] ? sysfs_write_file+0xb8/0xe5 > [ 31.647397] [<c10de6b5>] ? sysfs_write_file+0x0/0xe5 > [ 31.647403] [<c109f7c6>] ? vfs_write+0x7f/0xda > [ 31.647408] [<c101dad8>] ? do_page_fault+0x1fb/0x25f > [ 31.647412] [<c109f8b4>] ? sys_write+0x3c/0x60 > [ 31.647417] [<c1002e18>] ? sysenter_do_call+0x12/0x28 > > Hope this helps fixing the problem. > > Kind Regards, > - Sedat - > > P.S.: > Recently I watched a video with a speeh of Greg K-H [1] and extracted > the maintainers/contributors via: > > $ ./scripts/get_maintainer.pl -f drivers/cpuidle/governors/menu.c <--- > nr_iowait_cpu() > $ ./scripts/get_maintainer.pl -f drivers/cpufreq/cpufreq_ondemand.c > <--- [cpufreq_ondemand] > > [1] Write and Submit your first Linux kernel Patch: > http://fosdem.org/2010/schedule/events/linuxkernelpatch > > ------ INVESTIGATIONS ----- > > $ env COLUMNS=120 dpkg -l | grep -i cpufreq > ii cpufrequtils 007-1 utilities to > deal with the cpufreq Linux kernel feature > ii libcpufreq0 007-1 shared library > to deal with the cpufreq Linux kernel feature > > $ sudo lsmod | grep freq | sort > acpi_cpufreq 4343 1 > cpufreq_conservative 6260 0 > cpufreq_ondemand 5810 2 > cpufreq_performance 590 0 > cpufreq_powersave 582 0 > cpufreq_stats 1969 0 > freq_table 1647 3 acpi_cpufreq,cpufreq_ondemand,cpufreq_stats > mperf 899 1 acpi_cpufreq > processor 22099 3 acpi_cpufreq > > $ grep -i freq /boot/config-2.6.35-rc1-iniza-686-kms | grep -i cpu > # CPU Frequency scaling > CONFIG_CPU_FREQ=y > CONFIG_CPU_FREQ_TABLE=m > # CONFIG_CPU_FREQ_DEBUG is not set > CONFIG_CPU_FREQ_STAT=m > # CONFIG_CPU_FREQ_STAT_DETAILS is not set > # CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set > # CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set > CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y > # CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set > # CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set > CONFIG_CPU_FREQ_GOV_PERFORMANCE=m > CONFIG_CPU_FREQ_GOV_POWERSAVE=m > CONFIG_CPU_FREQ_GOV_USERSPACE=y > CONFIG_CPU_FREQ_GOV_ONDEMAND=m > CONFIG_CPU_FREQ_GOV_CONSERVATIVE=m > # CPUFreq processor drivers > # CONFIG_X86_PCC_CPUFREQ is not set > CONFIG_X86_ACPI_CPUFREQ=m > CONFIG_X86_CPUFREQ_NFORCE2=m > -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
