Bug 123963
| Summary: | longrun fails with /dev/cpu/0/cpuid: Invalid argument | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | David A. Cafaro <dac> |
| Component: | kernel-utils | Assignee: | Dave Jones <davej> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 2 | CC: | alan, pfrields, wayne |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i686 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2005-01-11 01:23:52 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
longrun attempts to read from the offset 0xFFFFFFFFFFFF80860000 using pread(). Looks like a sign extension bug in the longrun code from a first glance at it - it would have stopped working at the point we switched to 64bit file offsets when building it. If there is anyway I can help with getting this fixed let me know. I'm not a kernel hacker, but I've worked with C code in the past, and am more than willing to test things on my laptop to get this up and running (my laptop has volunteered to be a test machine). Would realy like to get this up and running, these new Efficeon processors seem pretty slick from what I've been able to play with so far and power management is the only thing not working. (Side note, the touchpad (i8042.nomux) things is a kernel specific thing that is not part of this bug report, I filed a seperate bug report for it at kernel.org since it is present in the 2.6.6 kernel as well, just wanted to make that clear) New update! Ok, I went and downloaded the source files from the debian group and the patch file. After compling those on the machine, that version of longrun works. http://packages.debian.org/unstable/utils/longrun.html Files used: longrun_0.9.orig.tar.gz longrun_0.9-13.diff.gz Results: # ./longrun -p LongRun: disabled LongRun Thermal Extensions (LTX): inactive Current performance window: 0 to 100 Current performance level: 100 LongRun flags: performance # ./longrun -l # % MHz Volts usage 0 533 0.850 0.228 14 600 0.925 0.304 36 700 1.000 0.414 64 833 1.150 0.652 100 1000 1.300 1.000 Umm yes it is a bug. Until someone fixes our kernel-utils its broken. duh, not thinking. for some reason I thought this had been dropped from kernel-utils. Is there any reason it shouldn't be ? What does it do that cpufreq doesn't ? I'm not sure if you are referring to /sys/devices/system/cpu/cpu0/cpufreq that cpuspeed uses, but that was going to be the next bug I reported. The cpuspeed utility doesn't work. It fails with: # cpuspeed Error: Cannot write to speed control file: /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed Errir: No such file or directy An ls of the /sys/devices/system/cpu/cpu0/cpufreq directy returns the following: # ls /sys/devices/system/cpu/cpu0/cpufreq/ cpuinfo_max_freq scaling_available_governors scaling_governor scaling_min_freq cpuinfo_min_freq scaling_driver scaling_max_freq I thought it was because there was no longrun module driver built with the kernel, but as I was going back to rebuild the kernel rpm I noticed that longrun had been compiled into the kernel as oposed to as a module. So it's there, but it's not working with cpuspeed. Another small note on the longrun from debian, they added contol over thermal scaling to the .13 patch, but that doesn't work with my laptop, it actualy locks it up pretty good. All other functions seem to work fine though. If you need another bug open for just the cpuspeed issue, please let me know. This is what I've figured out so far: The default FC2 configuration supposedly has USERSPACE chosen, which would allow 'userspace" as a governor. However, cat scaling_available_governors does not list userspace, and you cannot echo userspace > scaling_governor So the first problem is that 'userspace' should be available. The second problem is that 'cpuspeed' itself assumes "userspace" is an available governor without actually checking for it first. My laptop is a Fujitsu P2110, which has the Transmeta Crusoe chip. longrun is supposedly compiled into the kernel. Latest longrun from Debian is 0.9.14 which fixes other bits too. Still doesn't seem to address the 64bit sign extend bug with pread and 64bit file offset. I've got a local merge of this with kernel-utils-2.4 if you want it Arjan Using the Debian 0.9.14 patch also fixes longrun on a Toshiba Libretto L1. I think the fixed version should be included wether or not it is still buggy with 64bits, it's better than the current one. this should be fixed in the latest release. I can't confirm this in Fedora Core 2 I have already migrated to Fedora Core 3. I can confirm that longrun does function in Fedora Core 3, so this is probably fixed in FC2 as well (just can't confirm, sorry). |
Description of problem: When trying to run longrun on a Sharp MM20 laptop with a Transmeta Efficeon processor I get the following error: # longrun -p longrun: error reading /dev/cpu/0/cpuid Invalid argument I have the msr and cpuid modules loaded (had to load manualy). Doing "cat /dev/cpu/0/cpuid" returns: GenuMx86ineT$ / Running the kernel-2.6.5-1.358 i686 kernel as chosen by the Fedora Core 2 installer. Kernel arguments past at boot include: acpi=on i8042.nomux idebus=66 rhgb quiet. The i8042.nomux argument is needed for the Laptops synaptics touchpad to function. With-out that argument the touchpad won't respond at all and doesn't show in dmesg. In dmesg I see these messages: CPU: Transmeta Efficeon(tm) Processor TM8000 stepping 04 ACPI: Processor [CPU0] (supports C1 C2 C3) ACPI: Thermal Zone [THRM] (33 C) agpgart: Detected Transmeta Efficeon TM8000 series chipset Those are just some of the relevant ones I thought to mark down. ---------------------------------------------------------------- Version-Release number of selected component (if applicable): kernel-utils-2.4-9.1.131 How reproducible: Always Steps to Reproduce: 1. Install Fedora Core 2 on Sharp MM20 Efficeon laptop 2. modprobe cpuid;modprobe msr 3. run longrun -p or longrun -l Actual Results: # longrun -p longrun: error reading /dev/cpu/0/cpuid: Invalid argument Expected Results: A list of current longrun settings and status. Additional info: