https://bugzilla.kernel.org/show_bug.cgi?id=58761
Summary: related_cpus truncated with acpi-cpufreq driver on kernel 3.9.3 Product: ACPI Version: 2.5 Kernel Version: 3.9.3 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Config-Processors AssignedTo: acpi_config-process...@kernel-bugs.osdl.org ReportedBy: jean-philippe.hal...@exascale-computing.eu Regression: No Created an attachment (id=102441) --> (https://bugzilla.kernel.org/attachment.cgi?id=102441) cpufreq-info trace Hello, I have just installed the 3.9.3 kernel on my Debian 7 installation. Linux 3.9.3-exa #7 SMP Fri May 24 11:12:58 CEST 2013 x86_64 GNU/Linux CPU Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz (Ivy Bridge) Since then, the related_cpus file in /sys/devices/system/cpu/cpu*/cpufreq/related_cpus just returns the id of the current core: /sys/devices/system/cpu/cpu0/cpufreq/related_cpus contains 0 /sys/devices/system/cpu/cpu6/cpufreq/related_cpus contains 6 etc I read on an archive thread (http://lkml.indiana.edu/hypermail/linux/kernel/1303.3/00144.html) that this could happen when the new intel_pstate driver is activated, but I have deactivated it in the kernel options. I have attached my cpufreq-info trace which proves I am using the default acpi-cpufreq driver. Therefore, there must be some problem with related_cpus when using the acpi-cpufreq driver. Here is a listing of my files in /sys/devices/system/cpu/cpu0/cpufreq/: affected_cpus:0 bios_limit:3401000 cpuinfo_cur_freq:3401000 cpuinfo_max_freq:3401000 cpuinfo_min_freq:1600000 cpuinfo_transition_latency:10000 related_cpus:0 scaling_available_frequencies:3401000 3400000 3300000 3100000 3000000 2900000 2800000 2600000 2500000 2400000 2200000 2100000 2000000 1900000 1700000 1600000 scaling_available_governors:conservative userspace powersave ondemand performance scaling_cur_freq:3401000 scaling_driver:acpi-cpufreq scaling_governor:ondemand scaling_max_freq:3401000 scaling_min_freq:1600000 scaling_setspeed:<unsupported> -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla