(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Mon, 5 Jan 2009 03:22:43 -0800 (PST) bugme-daemon at bugzilla.kernel.org wrote: > http://bugzilla.kernel.org/show_bug.cgi?id=12362 > > Summary: Extremely high cpu usage and temps starting 2.6.25 > Product: Platform Specific/Hardware > Version: 2.5 > KernelVersion: 2.6.28 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: x86-64 > AssignedTo: platform_x86_64 at kernel-bugs.osdl.org > ReportedBy: curaga at operamail.com > > > Latest working kernel version: 2.6.24 > Earliest failing kernel version: 2.6.25 (regression) > Distribution: None > Hardware Environment: X86_64 > Software Environment: pure 64-bit software > Problem Description: Starting with 2.6.25, my CPU temperatures are reported as > 55C when idle (30C in 2.6.24). Load avg stays over 0.5 even when completely > idle, and mpg123 takes 38% of cpu when it took 3% in 2.6.24 (from top). > > While the temperature readings of coretemp might be wrong in all kernels, > afterall .24 claims using undocumented features and .25-.28 claim to use a > relative scale, the cpu usage of all processes has greatly increased starting > with .25 kernel. > > I have tried various configs with .25, .26, and .28, both identical with my .24 > config and variations such as enabling tickless, hpet, and using different IO > schedulers etc. No matter the config, all kernels starting .25 show this huge > cpu usage in all processes. > > I'm not at all sure what causes this, so marking as platform-specific. > > Pentium Dual Core E2160 overclocked to 3Ghz > > Steps to reproduce: Boot a 64-bit kernel 2.6.25 or later > So I take it that you beleive that this regression was added into drivers/hwmon/coretemp.c during 2.6.25 development? If so, possible culprits would be: commit 561d9a969455cb009bb15b63e1d925dc527e7a9d Author: Rafael J. Wysocki <rjw at sisk.pl> Date: Mon Dec 3 18:01:50 2007 +0100 HWMON: coretemp, suspend fix commit 6369a2887a1b35fde91573adc650528e3efea8e9 Author: Rudolf Marek <r.marek at assembler.cz> Date: Fri Jan 18 00:42:54 2008 +0100 hwmon: (coretemp) Add maximum cooling temperature readout commit 118a88718886a6cb7fb2cf7fb77ef2eea30c73a1 Author: Rudolf Marek <r.marek at assembler.cz> Date: Sun Feb 17 22:59:39 2008 +0100 hwmon: (coretemp) Add TjMax detection for mobile CPUs commit ae770152c801f10a91e5e86597a39b5f9ccf2d0d Author: Rudolf Marek <r.marek at assembler.cz> Date: Fri Jan 18 00:50:04 2008 +0100 hwmon: (coretemp) Add Penryn CPU to coretemp commit 34c86c1e622ec77ba81c01969003bbc8e15156f3 Author: Darrick J. Wong <djwong at us.ibm.com> Date: Fri Aug 15 00:40:41 2008 -0700 coretemp: recognize Nehalem CPUs None of which look very likely :(
