Bug 16322
Created attachment 26988 [details]
dmesg output
Created attachment 26989 [details]
lspci -vv
Could you provide the contents of /proc/cpuinfo ? We need to figure out why cpufreq thinks you do have mperf/aperf but the cpu feature flags disagree. Created attachment 27003 [details]
cat /proc/cpuinfo
Here we go ;)
Oh wow, look at that. For some reason cpu #1 doesn't have aperfmperf in the flags line, all others do. That is most strange for a quad core, since those are supposed to be perfectly symmetrical. We get the information from CPUID, ECX, level 6, bit 0. So for some reason your CPUID output is corrupted.. Created attachment 27028 [details]
cat /proc/cpuinfo (kernel-2.6.34)
I just took a look at the cpuinfo output under a kernel2-6-34.
Guess what, "aperfmperf" shows up on every processor.
hpa, any clue as to what could have changed between .34 and now to cause inconsistent cpu feature flags? Initially I though b0rken BIOS but if one kernel works and another not (in a reliable fashion) that seems unlikely. It does, indeed... although we have some early workarounds I don't think *off the top of my head* this particular one is involved. Probably need to trace the early code paths and look. Handled-By : H. Peter Anvin <hpa@zytor.com> Created attachment 27052 [details]
debug CPUID features init
Well, X86_FEATURE_APERFMPERF is checked for in
init_scattered_cpuid_features() so it has to be that CPUID level
verification that fails due to some strange reason.
boris64, can you try the following debug patch on the failing kernel
(attachment #27052 [details]):
---
diff --git a/arch/x86/kernel/cpu/addon_cpuid_features.c b/arch/x86/kernel/cpu/addon_cpuid_features.c
index 10fa568..5a4ab80 100644
--- a/arch/x86/kernel/cpu/addon_cpuid_features.c
+++ b/arch/x86/kernel/cpu/addon_cpuid_features.c
@@ -46,12 +46,16 @@ void __cpuinit init_scattered_cpuid_features(struct cpuinfo_x86 *c)
/* Verify that the level is valid */
max_level = cpuid_eax(cb->level & 0xffff0000);
if (max_level < cb->level ||
- max_level > (cb->level | 0xffff))
+ max_level > (cb->level | 0xffff)) {
+ pr_err("%s: invalid level: 0x%08x, cpu: %d\n", __func__, max_level, c->apicid);
continue;
+ }
cpuid(cb->level, ®s[CR_EAX], ®s[CR_EBX],
®s[CR_ECX], ®s[CR_EDX]);
+ pr_err("%s: reg: 0x%08x\n", __func__, regs[cb->reg]);
+
if (regs[cb->reg] & (1 << cb->bit))
set_cpu_cap(c, cb->feature);
}
Created attachment 27057 [details]
dmesg of kernel-2.6.35-rc4+ with cpuid debug patch
dmesg of kernel-2.6.35-rc4+ with cpuid debug patch
Created attachment 27058 [details]
debug cpuid -v2
Ok, I admit, the first patch was a bit clumsy but it shows where the problem is:
cpuid_eax(0) = 0x00000002 on core 1 which is the largest standard
function supported by cpuid. And the funny thing is that on the other
cores you're passing the checks just fine.
[ 0.020059] CPU0: Intel(R) Core(TM)2 Quad CPU Q9300 @ 2.50GHz stepping 07
[ 0.025016] Booting Node 0, Processors #1
[ 0.001999] init_scattered_cpuid_features: invalid level: 0x00000002, cpu: 0
[ 0.001999] init_scattered_cpuid_features: invalid level: 0x00000002, cpu: 0
[ 0.001999] init_scattered_cpuid_features: invalid level: 0x00000002, cpu: 0
[ 0.001999] init_scattered_cpuid_features: reg: 0x00000000
[ 0.001999] init_scattered_cpuid_features: invalid level: 0x80000008, cpu: 0
[ 0.001999] init_scattered_cpuid_features: invalid level: 0x80000008, cpu: 0
[ 0.001999] init_scattered_cpuid_features: invalid level: 0x80000008, cpu: 0
[ 0.001999] init_scattered_cpuid_features: invalid level: 0x80000008, cpu: 0
Can you try the new patch now at attachment #27058 [details] on _both_ the failing and the
working kernels. Also, can you check whether your BIOS is up to date?
Thanks.
Yep, i'll do that. PS: BIOS is up to date (last BIOS on the ASUS support site is dated 2008/11/07) Created attachment 27059 [details]
dmesg of kernel-2.6.35-rc4+ with cpuid debug patch v2
Created attachment 27060 [details]
dmesg of kernel-2.6.34.1 with cpuid debug patch v2
Created attachment 27061 [details]
restore 34.1 cpuid feat detection
Ok, the patch at attachment #27061 [details] restores the aperf/mperf detection behavior from 34 to the current failing kernel. If it works, then it looks like core1 is somehow delayed with initializing cpuid feats properly.
Please test,
thanks.
Created attachment 27062 [details]
dmesg of kernel-2.6.35-rc4+ with cpuid debug patch v3
Ok, done. The warning still seems to be there.
Created attachment 27063 [details]
Re-run get_cpu_cap() after unmasking CPUID levels
Please try the
Please try the above patch, that should have been... Hm, when i try your attachment https://bugzilla.kernel.org/attachment.cgi?id=27063, i get an adobe ppd file instead of a patch. Is konqueror tricking me or did something go wrong here? Hey Peter, any news on this? As written before, your last posted patch is a ppd file(?) instead of a proper patch. Thank you in advance. It's just konqueror being full of it. Just save it as a file. It's the same problem in mozilla/iexplorer. Are we both talking about the same attachment? "Re-run get_cpu_cap() after unmasking CPUID levels (98.40 KB, patch) 2010-07-09 23:26, H. Peter Anvin" -> https://bugzilla.kernel.org/attachment.cgi?id=27063 It really is a ppd, isn't it? You don't own a laserjet 420, do you? ;) The hell... no I don't. Created attachment 27137 [details]
Re-run get_cpu_cap() after unmasking CPUID levels (trying again)
Did the corrected patch work? Nope, sorry, didn't seem to fix it. Warning is still there. Additionally core1 now misses two flags (aperfmon+aperfmperf) instead of only missing aperfmperf. Created attachment 27158 [details]
dmesg of kernel-2.6.35-rc4+ with cpuid debug patch v4
Created attachment 27159 [details]
cat /proc/cpuinfo (2.6.35-cpuiddebug-v4)
On Sunday, August 01, 2010, Boris Cuber wrote:
> Am Sonntag, 1. August 2010 schrieben Sie:
> > This message has been generated automatically as a part of a summary report
> > of recent regressions.
> >
> > The following bug entry is on the current list of known regressions
> > from 2.6.34. Please verify if it still should be listed and let the
> > tracking team know (either way).
> >
> >
> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=16322
> > Subject : WARNING: at /arch/x86/include/asm/processor.h:1005
> > read_measured_perf_ctrs+0x5a/0x70()
> > Date : 2010-07-01 13:54 (32 days old)
>
> Warning is still there on 2.6.35-rc6+
On Monday, August 30, 2010, Boris Cuber wrote:
> Am Montag, 30. August 2010 schrieben Sie:
> > This message has been generated automatically as a part of a report
> > of regressions introduced between 2.6.34 and 2.6.35.
> >
> > The following bug entry is on the current list of known regressions
> > introduced between 2.6.34 and 2.6.35. Please verify if it still should
> > be listed and let the tracking team know (either way).
> >
> >
> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=16322
> > Subject : WARNING: at /arch/x86/include/asm/processor.h:1005
> > read_measured_perf_ctrs+0x5a/0x70() Submitter : boris64
> > <bugzilla.kernel.org@boris64.net>
> > Date : 2010-07-01 13:54 (60 days old)
> > Handled-By : H. Peter Anvin <hpa@zytor.com>
>
> The warning is still present in v2.6.35.4 and v2.6.36-rc3.
Hi! Today, I've also found out, that I seem to have affacted by this bug too. On boot, I get this: ------------[ cut here ]------------ WARNING: at /usr/src/linux-2.6.35-gentoo-r5/arch/x86/include/asm/processor.h:1005 0x81017063() Hardware name: Modules linked in: Pid: 386, comm: kondemand/0 Not tainted 2.6.35-gentoo-r5 #1 Call Trace: [<81030349>] ? 0x81030349 [<81017063>] ? 0x81017063 [<81017063>] ? 0x81017063 [<81017020>] ? 0x81017020 [<8103039c>] ? 0x8103039c [<81017063>] ? 0x81017063 [<810562b9>] ? 0x810562b9 [<81016f71>] ? 0x81016f71 [<81129d6f>] ? 0x81129d6f [<812a75a6>] ? 0x812a75a6 [<812a976a>] ? 0x812a976a [<81040954>] ? 0x81040954 [<813c4876>] ? 0x813c4876 [<81044420>] ? 0x81044420 [<81040860>] ? 0x81040860 [<810440c4>] ? 0x810440c4 [<81044050>] ? 0x81044050 [<810031be>] ? 0x810031be ---[ end trace f21826c06392746e ]--- Created attachment 29622 [details]
dmesg output
Created attachment 29632 [details]
lspci -vv output
Created attachment 29642 [details]
/proc/cpuinfo output
The Error also accours, when I am using the "vanilla" kernel and not the gentoo kernel (aka gentoo-sources).
On Sunday, September 12, 2010, Boris Cuber wrote:
> Am Sunday 12 September 2010 schrieben Sie:
> > This message has been generated automatically as a part of a report
> > of regressions introduced between 2.6.34 and 2.6.35.
> >
> > The following bug entry is on the current list of known regressions
> > introduced between 2.6.34 and 2.6.35. Please verify if it still should
> > be listed and let the tracking team know (either way).
> >
> >
> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=16322
> > Subject : WARNING: at /arch/x86/include/asm/processor.h:1005
> > read_measured_perf_ctrs+0x5a/0x70() Submitter : boris64
> > <bugzilla.kernel.org@boris64.net>
> > Date : 2010-07-01 13:54 (74 days old)
> > Handled-By : H. Peter Anvin <hpa@zytor.com>
>
> Not fixed yet.
> Warning is still there in 2.6.35.4 & 2.6.36-rc3+.
Still present in 2.6.36-rc4 cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 28 model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz stepping : 2 cpu MHz : 800.000 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm bogomips : 3192.41 clflush size : 64 cache_alignment : 64 address sizes : 32 bits physical, 32 bits virtual power management: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 28 model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz stepping : 2 cpu MHz : 800.000 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 1 initial apicid : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm bogomips : 3191.95 clflush size : 64 cache_alignment : 64 address sizes : 32 bits physical, 32 bits virtual power management: Something to do with this patch? http://lkml.org/lkml/2010/3/26/119 Hi Ritz,
removing
{ X86_FEATURE_APERFMPERF, CR_ECX, 0, 0x00000006 },
{ X86_FEATURE_CPB, CR_EDX, 9, 0x80000007 },
on a 2.6.35 kernel fixes the bug on my i5-650. I guess X86_FEATURE_CPB only would be enough, but did not have the time for testing :/
Thank you alot for the hint.
From: bugzilla-daemon@bugzilla.kernel.org Date: Sun, Sep 19, 2010 at 09:43:54AM +0000 > https://bugzilla.kernel.org/show_bug.cgi?id=16322 .. > --- Comment #42 from alexwild@gmx.de 2010-09-19 09:43:50 --- > Hi Ritz, > > removing > { X86_FEATURE_APERFMPERF, CR_ECX, 0, 0x00000006 }, > { X86_FEATURE_CPB, CR_EDX, 9, 0x80000007 }, > on a 2.6.35 kernel fixes the bug on my i5-650. I guess X86_FEATURE_CPB only > would be enough, but did not have the time for testing :/ > Thank you alot for the hint. (switching to mail since bugzilla.kernel.org is kinda broken right now): Alex, Jonas, can you guys both paste the error message you see. It looks like I've mixed up APERF with CPB and so the X86_FEATURE_CPB is wrong there but you shouldn't be seeing the warning in the bugzilla title but something else. Thanks. Hi Borislav, disabling X86_FEATURE_APERFMPERF does the trick. [ 1.346334] ------------[ cut here ]------------ [ 1.346397] WARNING: at /usr/src/linux-2.6.35.4/arch/x86/include/asm/processor.h:1005 read_measured_perf_ctrs+0x43/0x50() [ 1.346484] Hardware name: System Product Name [ 1.346530] Modules linked in: [ 1.346590] Pid: 422, comm: kondemand/2 Not tainted 2.6.35.4 #1 [ 1.346640] Call Trace: [ 1.346685] [<c1032c38>] ? warn_slowpath_common+0x78/0xb0 [ 1.346735] [<c1016ef3>] ? read_measured_perf_ctrs+0x43/0x50 [ 1.346786] [<c1016ef3>] ? read_measured_perf_ctrs+0x43/0x50 [ 1.346804] ------------[ cut here ]------------ Created attachment 30622 [details]
Unbreak CPB CPUID feature
(In reply to comment #44) > Hi Borislav, > > disabling X86_FEATURE_APERFMPERF does the trick. How do you do that? Do you mean you do what you do in comment #42? Because removing the X86_FEATURE_APERFMPERF line is not the right thing to do. Please try this patch instead: https://bugzilla.kernel.org/attachment.cgi?id=30622. It is against latest Linus git, let me know if you need a version against a different kernel. Thanks, Boris. [Resending since Bugzilla seems to have spat it out] I'm confused - I don't see CPB set in the CPUID dump that the posted, so how could this be a misdetect of CPB? Furthermore: a) I'd really like to verify that there is a non-AMD CPU which uses this bit for another purpose and b) If that is, rather than duplicating code it would be better to add an optional vendor ID to the scatter table. -hpa Reply-To: bp@amd64.org From: "H. Peter Anvin" <hpa@zytor.com> Date: Mon, Sep 20, 2010 at 11:22:08AM -0400 > [Resending since Bugzilla seems to have spat it out] Yeah this message somehow got delayed - I just got it so this is why I didn't know that you've asked for information. > I'm confused - I don't see CPB set in the CPUID dump that the posted, so > how could this be a misdetect of CPB? Furthermore: > > a) I'd really like to verify that there is a non-AMD CPU which uses this > bit for another purpose and > b) If that is, rather than duplicating code it would be better to add an > optional vendor ID to the scatter table. Here's the whole story as I see it: 1) I just thought that the CPB bit should be in AMD-only path, since Intel's turbo boost bit is somewhere else, i.e. Function 06h, EAX[1] and I'd rather put the AMD-one of Fn8000_0007_EDX[9] in AMD-only path. But I'm fine with you wanting to keep it in scattered.c for brevity too. 2) Totally unrelated, obviously, the couple users on the bugzilla have conflicting features reported over CPUID: core 0 reports, for example, max base level for base CPUID functions as being 0x0000000b while the remaining cores 1,2,3 report as max level 0x00000002 and therefore the APERFMPERF check fails since boot_cpu_data's bitmasks get cleared when AND-ing it with the capabilities of the remaining cores at the end of identify_cpu(). For example, https://bugzilla.kernel.org/attachment.cgi?id=29642, has aperfmperf set only on core0 but not on core1. The initial reporter has it set on cores 0,2,3 but not on 1: https://bugzilla.kernel.org/attachment.cgi?id=27159 One other user sent me the debug output after applying --- diff --git a/arch/x86/kernel/cpu/addon_cpuid_features.c b/arch/x86/kernel/cpu/addon_cpuid_features.c index 10fa568..8037c7a 100644 --- a/arch/x86/kernel/cpu/addon_cpuid_features.c +++ b/arch/x86/kernel/cpu/addon_cpuid_features.c @@ -45,6 +45,9 @@ void __cpuinit init_scattered_cpuid_features(struct cpuinfo_x86 *c) /* Verify that the level is valid */ max_level = cpuid_eax(cb->level & 0xffff0000); + pr_err("%s: cpu %d: max_level: 0x%08x for 0x%08x\n", + __func__, smp_processor_id(), max_level, cb->level); + if (max_level < cb->level || max_level > (cb->level | 0xffff)) continue; @@ -52,6 +55,9 @@ void __cpuinit init_scattered_cpuid_features(struct cpuinfo_x86 *c) cpuid(cb->level, ®s[CR_EAX], ®s[CR_EBX], ®s[CR_ECX], ®s[CR_EDX]); + pr_err("%s: cpu %d: reg: %d, value 0x%08x\n", + __func__, smp_processor_id(), cb->reg, regs[cb->reg]); + if (regs[cb->reg] & (1 << cb->bit)) set_cpu_cap(c, cb->feature); } --- and very strangely, max_level is different on core0 vs the remaining ones: [ 0.000282] init_scattered_cpuid_features: cpu 0: max_level: 0x0000000b for 0x00000006 [ 0.000357] init_scattered_cpuid_features: cpu 0: reg: 0, value 0x00000007 [ 0.000410] init_scattered_cpuid_features: cpu 0: max_level: 0x0000000b for 0x00000006 [ 0.000484] init_scattered_cpuid_features: cpu 0: reg: 0, value 0x00000007 [ 0.000537] init_scattered_cpuid_features: cpu 0: max_level: 0x0000000b for 0x00000006 [ 0.000612] init_scattered_cpuid_features: cpu 0: reg: 1, value 0x00000001 [ 0.000666] init_scattered_cpuid_features: cpu 0: max_level: 0x80000008 for 0x80000007 [ 0.000740] init_scattered_cpuid_features: cpu 0: reg: 2, value 0x00000100 [ 0.000794] init_scattered_cpuid_features: cpu 0: max_level: 0x80000008 for 0x8000000a [ 0.000868] init_scattered_cpuid_features: cpu 0: max_level: 0x80000008 for 0x8000000a [ 0.000942] init_scattered_cpuid_features: cpu 0: max_level: 0x80000008 for 0x8000000a [ 0.001016] init_scattered_cpuid_features: cpu 0: max_level: 0x80000008 for 0x8000000a ... [ 0.051000] CPU0: Intel(R) Core(TM) i5 CPU 650 @ 3.20GHz stepping 02 [ 0.157410] Booting Node 0, Processors #1 [ 0.167758] Initializing CPU#1 [ 0.245379] init_scattered_cpuid_features: cpu 1: max_level: 0x00000002 for 0x00000006 [ 0.245380] init_scattered_cpuid_features: cpu 1: max_level: 0x00000002 for 0x00000006 [ 0.245382] init_scattered_cpuid_features: cpu 1: max_level: 0x00000002 for 0x00000006 [ 0.245384] init_scattered_cpuid_features: cpu 1: max_level: 0x80000008 for 0x80000007 [ 0.245385] init_scattered_cpuid_features: cpu 1: reg: 2, value 0x00000100 [ 0.245387] init_scattered_cpuid_features: cpu 1: max_level: 0x80000008 for 0x8000000a [ 0.245388] init_scattered_cpuid_features: cpu 1: max_level: 0x80000008 for 0x8000000a [ 0.245390] init_scattered_cpuid_features: cpu 1: max_level: 0x80000008 for 0x8000000a [ 0.245391] init_scattered_cpuid_features: cpu 1: max_level: 0x80000008 for 0x8000000a [ 0.265526] #2 [ 0.276404] Initializing CPU#2 [ 0.353381] init_scattered_cpuid_features: cpu 2: max_level: 0x00000002 for 0x00000006 [ 0.353382] init_scattered_cpuid_features: cpu 2: max_level: 0x00000002 for 0x00000006 [ 0.353384] init_scattered_cpuid_features: cpu 2: max_level: 0x00000002 for 0x00000006 [ 0.353385] init_scattered_cpuid_features: cpu 2: max_level: 0x80000008 for 0x80000007 [ 0.353387] init_scattered_cpuid_features: cpu 2: reg: 2, value 0x00000100 [ 0.353389] init_scattered_cpuid_features: cpu 2: max_level: 0x80000008 for 0x8000000a [ 0.353390] init_scattered_cpuid_features: cpu 2: max_level: 0x80000008 for 0x8000000a [ 0.353392] init_scattered_cpuid_features: cpu 2: max_level: 0x80000008 for 0x8000000a [ 0.353394] init_scattered_cpuid_features: cpu 2: max_level: 0x80000008 for 0x8000000a ... so it doesn't look like some kind of software issue but like inconsistent values between core0 and the remaining cores. Hmmm... On 09/20/2010 08:55 AM, Borislav Petkov wrote: > > Yeah this message somehow got delayed - I just got it so this is why I > didn't know that you've asked for information. > >> I'm confused - I don't see CPB set in the CPUID dump that the posted, so >> how could this be a misdetect of CPB? Furthermore: >> >> a) I'd really like to verify that there is a non-AMD CPU which uses this >> bit for another purpose and >> b) If that is, rather than duplicating code it would be better to add an >> optional vendor ID to the scatter table. > > Here's the whole story as I see it: > > 1) I just thought that the CPB bit should be in AMD-only path, since > Intel's turbo boost bit is somewhere else, i.e. Function 06h, EAX[1] and > I'd rather put the AMD-one of Fn8000_0007_EDX[9] in AMD-only path. But > I'm fine with you wanting to keep it in scattered.c for brevity too. > I'd rather leave it scattered.c; if we have to put a vendor ID into the table on it I'd be fine with that, but I'd prefer to only do so as necessary. > 2) Totally unrelated, obviously, the couple users on the bugzilla have > conflicting features reported over CPUID: core 0 reports, for example, > max base level for base CPUID functions as being 0x0000000b while the > remaining cores 1,2,3 report as max level 0x00000002 and therefore the > APERFMPERF check fails since boot_cpu_data's bitmasks get cleared when > AND-ing it with the capabilities of the remaining cores at the end of > identify_cpu(). Which is correct in the sense that only some CPUs report the features. However, I would have thought the feature-enabling code should have taken care of that. I'll have to look into why that doesn't happen. > > so it doesn't look like some kind of software issue but like > inconsistent values between core0 and the remaining cores. > Right. -hpa It looks like all the affected systems are Atom N270? Created attachment 30842 [details]
Test patch; should fix Atom N270 at least
Could someone who can reproduce this problem test this patch, please?
(In reply to comment #51) > Created an attachment (id=30842) [details] > Test patch; should fix Atom N270 at least > > Could someone who can reproduce this problem test this patch, please? Did not fix the problem on my N270. Could you include a dmidecode of your system, please? Created attachment 30852 [details] dmidecode output (In reply to comment #53) > Could you include a dmidecode of your system, please? Sure :) OK, what machine is that? The dmidecode fields are empty... OK, one more question: Could you install the "msr-tools" package and then run the following commands: rdmsr -cx -p 0 0x1a0 rdmsr -cx -p 1 0x1a0 Thanks! (In reply to comment #50) > It looks like all the affected systems are Atom N270? Nope, this is a Core2Quad (Q9300). OK, could you try the same experiment (but with -p 0 ... -p 3)? Geez, this bug is getting to be old enough that I just wrote up a patch that I had already done. Are you *sure* that https://bugzilla.kernel.org/attachment.cgi?id=27137 above didn't fix the problem? rdmsr -cx -p 0 0x1a0 0x4062972489 rdmsr -cx -p 1 0x1a0 0x4062972489 rdmsr -cx -p 2 0x1a0 0x4062972489 rdmsr -cx -p 3 0x1a0 0x4062972489 (In reply to comment #59) > Geez, this bug is getting to be old enough that I just wrote up a patch that > I > had already done. > > Are you *sure* that https://bugzilla.kernel.org/attachment.cgi?id=27137 above > didn't fix the problem? I really feel sorry somehow, but it didn't fix the warning. Additionally core #1 misses flag "arch_perfmon" (dunno what's that good for but it's gone). I just recompiled my new kernel-2.6.35.5 with the patch from https://bugzilla.kernel.org/attachment.cgi?id=27137 again to be sure. (In reply to comment #55) > OK, what machine is that? The dmidecode fields are empty... This is an "Flepo Delta". An Atom MiniPC. See: http://www.flepo.de/minipc-delta.html (There seems no english site to be available) (In reply to comment #56) > OK, one more question: > > Could you install the "msr-tools" package and then run the following > commands: > > rdmsr -cx -p 0 0x1a0 > rdmsr -cx -p 1 0x1a0 > > Thanks! Ok, here are the results: Galactica msr-tools-1.2 # ./rdmsr -cx -p 0 0x1a0 0x62972489 Galactica msr-tools-1.2 # ./rdmsr -cx -p 1 0x1a0 0x62972489 (In reply to comment #59) > Geez, this bug is getting to be old enough that I just wrote up a patch that > I > had already done. > > Are you *sure* that https://bugzilla.kernel.org/attachment.cgi?id=27137 above > didn't fix the problem? Well, I just now recompiled my kernel again with this patch applied. And the error still accours. In /proc/cpuinfo, core1 (ht) is now missing: arch_perfmon aperfmperf monitor tried rdmsr -cx p 0 0x1a0 and rdmsr -cx p 1 0x1a0 on the following kernels 2.6.35-22 (standard ubuntu kernel) 2.6.34-7 from mainline ubuntu 2.6.36rc4 from mainline ubuntu output of rdmsr is the same on all 3 kernels, but there is no warning with the .34 kernel output is 0x364972488 But /proc/cpuinfo is different on all of the kernels? cilie@cilie-laptop:~$ uname -a Linux cilie-laptop 2.6.34-02063407-generic #201009140905 SMP Tue Sep 14 10:10:14 UTC 2010 i686 GNU/Linux cilie@cilie-laptop:~$ sudo rdmsr -cx -p 0 0x1a0 0x364972488 /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 28 model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz stepping : 2 cpu MHz : 1067.000 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm bogomips : 3192.30 clflush size : 64 cache_alignment : 64 address sizes : 32 bits physical, 32 bits virtual power management: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 28 model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz stepping : 2 cpu MHz : 1600.000 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 1 initial apicid : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm bogomips : 3191.94 clflush size : 64 cache_alignment : 64 address sizes : 32 bits physical, 32 bits virtual power management: cilie@cilie-laptop:~$ uname -a Linux cilie-laptop 2.6.36-020636rc4-generic #201009130905 SMP Mon Sep 13 10:15:27 UTC 2010 i686 GNU/Linux cilie@cilie-laptop:~$ sudo modprobe msr [sudo] password for cilie: cilie@cilie-laptop:~$ sudo rdmsr -cx -p 0 0x1a0 0x364972488 cilie@cilie-laptop:~$ dmesg |grep WARNING [ 85.676247] WARNING: at /home/kernel-ppa/COD/linux/arch/x86/include/asm/processor.h:1006 read_measured_perf_ctrs+0x6e/0x80() /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 28 model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz stepping : 2 cpu MHz : 1600.000 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm bogomips : 3192.11 clflush size : 64 cache_alignment : 64 address sizes : 32 bits physical, 32 bits virtual power management: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 28 model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz stepping : 2 cpu MHz : 1067.000 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 1 initial apicid : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm bogomips : 3192.03 clflush size : 64 cache_alignment : 64 address sizes : 32 bits physical, 32 bits virtual power management: cilie@cilie-laptop:~$ uname -a Linux cilie-laptop 2.6.35-22-generic #33-Ubuntu SMP Sun Sep 19 20:34:50 UTC 2010 i686 GNU/Linux cilie@cilie-laptop:~$ sudo modprobe msr [sudo] password for cilie: cilie@cilie-laptop:~$ sudo rdmsr -cx -p 0 0x1a0 0x364972488 cilie@cilie-laptop:~$ dmesg |grep WARNING [ 97.305065] WARNING: at /build/buildd/linux-2.6.35/arch/x86/include/asm/processor.h:1005 read_measured_perf_ctrs+0x6c/0x80() /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 28 model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz stepping : 2 cpu MHz : 1067.000 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm bogomips : 3191.88 clflush size : 64 cache_alignment : 64 address sizes : 32 bits physical, 32 bits virtual power management: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 28 model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz stepping : 2 cpu MHz : 1600.000 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 1 initial apicid : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm bogomips : 3191.94 clflush size : 64 cache_alignment : 64 address sizes : 32 bits physical, 32 bits virtual power management: Maybee this is way older than we think....(some flags are missing on the .31 kernel as well) This is a standard updated Ubuntu 9.04 running on a eeePC 1000H. klaphat@eee:~$ uname -a Linux eee 2.6.31-22-generic #65-Ubuntu SMP Thu Sep 16 15:48:58 UTC 2010 i686 GNU/Linux klaphat@eee:~$ sudo rdmsr -cx -p 1 0x1a0 0x364972488 klaphat@eee:~$ dmesg |grep WARNING klaphat@eee:~$ dmesg |grep Error [ 140.709191] ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.SBRG.EC0_.BST1] (Node f7012dc8), AE_TIME [ 140.709299] ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.CBST] (Node f70156f0), AE_TIME [ 140.709385] ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.BAT0._BST] (Node f7015630), AE_TIME klaphat@eee:~$ dmesg |grep Exception [ 140.709141] ACPI Exception: AE_TIME, Returned by Handler for [EmbeddedControl] 20090521 evregion-424 [ 140.709483] ACPI Exception: AE_TIME, Evaluating _BST 20090521 battery-385 klaphat@eee:~$ /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 28 model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz stepping : 2 cpu MHz : 800.000 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm bogomips : 3191.92 clflush size : 64 power management: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 28 model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz stepping : 2 cpu MHz : 1600.000 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 1 initial apicid : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm bogomips : 3191.93 clflush size : 64 power management: That's actually quite likely; the reason it's failing now is because something is using it. I'm going to attach a CPUID dumping program; I would greatly appreciate it if all the reporters for this bug could run it on each processor (the processor number is an argument, e.g.): ./cpuid 0 Thanks, -hpa Created attachment 31132 [details]
CPUID dumping program (C source)
Created attachment 31252 [details]
CPUID strace output
Galactica ~ # ./cpuid 0
Leaf Subleaf EAX EBX ECX EDX
Segmentation fault
Galactica ~ # ./cpuid 1
Leaf Subleaf EAX EBX ECX EDX
Segmentation fault
:( Does not work. Attaching strace output
cilie@cilie-laptop:~/Documents$ uname -a Linux cilie-laptop 2.6.35-22-generic #33-Ubuntu SMP Sun Sep 19 20:34:50 UTC 2010 i686 GNU/Linux cilie@cilie-laptop:~/Documents$ cpuid -cpuid0 eax in eax ebx ecx edx 00000000 0000000a 756e6547 6c65746e 49656e69 00000001 000106c2 00020800 0040c39d bfe9fbff 00000002 4fba5901 0e3080c0 00000000 00000000 00000003 00000000 00000000 00000000 00000000 00000004 00000000 00000000 00000000 00000000 00000005 00000040 00000040 00000003 00020220 00000006 00000001 00000002 00000001 00000000 00000007 00000000 00000000 00000000 00000000 00000008 00000000 00000000 00000000 00000000 00000009 00000000 00000000 00000000 00000000 0000000a 07280203 00000000 00000000 00002501 80000000 80000008 00000000 00000000 00000000 80000001 00000000 00000000 00000001 00100000 80000002 20202020 20202020 746e4920 52286c65 80000003 74412029 54286d6f 4320294d 4e205550 80000004 20303732 20402020 30362e31 007a4847 80000005 00000000 00000000 00000000 00000000 80000006 00000000 00000000 02008040 00000000 80000007 00000000 00000000 00000000 00000000 80000008 00002020 00000000 00000000 00000000 Vendor ID: "GenuineIntel"; CPUID level 10 Intel-specific functions: Version 000106c2: Type 0 - Original OEM Family 6 - Pentium Pro Model 12 - Stepping 2 Reserved 4 Extended brand string: " Intel(R) Atom(TM) CPU N270 @ 1.60GHz" CLFLUSH instruction cache line size: 8 Hyper threading siblings: 2 Feature flags bfe9fbff: FPU Floating Point Unit VME Virtual 8086 Mode Enhancements DE Debugging Extensions PSE Page Size Extensions TSC Time Stamp Counter MSR Model Specific Registers PAE Physical Address Extension MCE Machine Check Exception CX8 COMPXCHG8B Instruction APIC On-chip Advanced Programmable Interrupt Controller present and enabled SEP Fast System Call MTRR Memory Type Range Registers PGE PTE Global Flag MCA Machine Check Architecture CMOV Conditional Move and Compare Instructions FGPAT Page Attribute Table CLFSH CFLUSH instruction DS Debug store ACPI Thermal Monitor and Clock Ctrl MMX MMX instruction set FXSR Fast FP/MMX Streaming SIMD Extensions save/restore SSE Streaming SIMD Extensions instruction set SSE2 SSE2 extensions SS Self Snoop HT Hyper Threading TM Thermal monitor 31 reserved TLB and cache info: 59: unknown TLB/cache descriptor ba: unknown TLB/cache descriptor 4f: unknown TLB/cache descriptor c0: unknown TLB/cache descriptor 80: unknown TLB/cache descriptor 30: unknown TLB/cache descriptor 0e: unknown TLB/cache descriptor Processor serial: 0001-06C2-0000-0000-0000-0000 cilie@cilie-laptop:~/Documents$ cpuid -cpuid1 eax in eax ebx ecx edx 00000000 0000000a 756e6547 6c65746e 49656e69 00000001 000106c2 01020800 0040c39d bfe9fbff 00000002 4fba5901 0e3080c0 00000000 00000000 00000003 00000000 00000000 00000000 00000000 00000004 00000000 00000000 00000000 00000000 00000005 00000040 00000040 00000003 00020220 00000006 00000001 00000002 00000001 00000000 00000007 00000000 00000000 00000000 00000000 00000008 00000000 00000000 00000000 00000000 00000009 00000000 00000000 00000000 00000000 0000000a 07280203 00000000 00000000 00002501 80000000 80000008 00000000 00000000 00000000 80000001 00000000 00000000 00000001 00100000 80000002 20202020 20202020 746e4920 52286c65 80000003 74412029 54286d6f 4320294d 4e205550 80000004 20303732 20402020 30362e31 007a4847 80000005 00000000 00000000 00000000 00000000 80000006 00000000 00000000 02008040 00000000 80000007 00000000 00000000 00000000 00000000 80000008 00002020 00000000 00000000 00000000 Vendor ID: "GenuineIntel"; CPUID level 10 Intel-specific functions: Version 000106c2: Type 0 - Original OEM Family 6 - Pentium Pro Model 12 - Stepping 2 Reserved 4 Extended brand string: " Intel(R) Atom(TM) CPU N270 @ 1.60GHz" CLFLUSH instruction cache line size: 8 Initial APIC ID: 1 Hyper threading siblings: 2 Feature flags bfe9fbff: FPU Floating Point Unit VME Virtual 8086 Mode Enhancements DE Debugging Extensions PSE Page Size Extensions TSC Time Stamp Counter MSR Model Specific Registers PAE Physical Address Extension MCE Machine Check Exception CX8 COMPXCHG8B Instruction APIC On-chip Advanced Programmable Interrupt Controller present and enabled SEP Fast System Call MTRR Memory Type Range Registers PGE PTE Global Flag MCA Machine Check Architecture CMOV Conditional Move and Compare Instructions FGPAT Page Attribute Table CLFSH CFLUSH instruction DS Debug store ACPI Thermal Monitor and Clock Ctrl MMX MMX instruction set FXSR Fast FP/MMX Streaming SIMD Extensions save/restore SSE Streaming SIMD Extensions instruction set SSE2 SSE2 extensions SS Self Snoop HT Hyper Threading TM Thermal monitor 31 reserved TLB and cache info: 59: unknown TLB/cache descriptor ba: unknown TLB/cache descriptor 4f: unknown TLB/cache descriptor c0: unknown TLB/cache descriptor 80: unknown TLB/cache descriptor 30: unknown TLB/cache descriptor 0e: unknown TLB/cache descriptor Processor serial: 0001-06C2-0000-0000-0000-0000 I'm not getting any data at all. Could something be missing in my custom kernel? What am i doing wrong? boris64 tmp # for i in 0 1 2 3; do ./cpuid $i; done Leaf Subleaf EAX EBX ECX EDX Leaf Subleaf EAX EBX ECX EDX Leaf Subleaf EAX EBX ECX EDX Leaf Subleaf EAX EBX ECX EDX boris64 tmp # Program does not work as it should :( Leaf Subleaf EAX EBX ECX EDX 00000000 00000000: 0000000b .... 756e6547 Genu 6c65746e ntel 49656e69 ineI 00000001 00000000: 00020652 R... 04100800 .... 0298e3ff .... bfebfbff .... 00000002 00000000: 55035a01 .Z.U 00f0b2e3 .... 00000000 .... 09ca212c ,!.. 00000003 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000004 00000000: 1c004121 !A.. 01c0003f ?... 0000003f ?... 00000000 .... 00000004 00000001: 1c004121 !A.. 01c0003f ?... 0000003f ?... 00000000 .... after this Subleaf increases infinitely, rest same output as last 2 lines. boris64: looks like your missing the CPUID driver in the kernel. Alex: will look at. Created attachment 31432 [details]
Updated CPUID-dumping program
boris64: try doing "modprobe cpuid" if you have it as a module. Otherwise you need to enable CONFIG_X86_CPUID in your kernel compile. Hm, that's strange, i _have_ CONFIG_X86_CPUID=y in my config. I also have these cpuid-files in /dev/cpu/%d/ that your dumping program seems to look at. Well, whatever, perhaps i'll try a newer live-cd of ubuntu or something like that tomorrow. No idea then... I just tried an ubuntu cd (v10.10pre, kernel-2.6.35-19(?)) with the very same result. No data from ./cpuid 0/1/2/3. (Yep, i did a 'modprobe cpuid' first). What does strace show? [strace output]
execve("./cpuid", ["./cpuid", "0"], [/* 43 vars */]) = 0
brk(0) = 0x673000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f44365b2000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=193011, ...}) = 0
mmap(NULL, 193011, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f4436582000
close(3) = 0
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360\355\341z6\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1483104, ...}) = 0
mmap(0x367ae00000, 3586888, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x367ae00000
mprotect(0x367af62000, 2097152, PROT_NONE) = 0
mmap(0x367b162000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x162000) = 0x367b162000
mmap(0x367b167000, 19272, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x367b167000
close(3) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f4436581000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f4436580000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f443657f000
arch_prctl(ARCH_SET_FS, 0x7f4436580700) = 0
mprotect(0x367b162000, 16384, PROT_READ) = 0
mprotect(0x601000, 4096, PROT_READ) = 0
mprotect(0x367ac1e000, 4096, PROT_READ) = 0
munmap(0x7f4436582000, 193011) = 0
fstat(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 9), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f44365b1000
write(1, "Leaf Subleaf EAX "..., 81) = 81
open("/dev/cpu/0/cpuid", O_RDONLY) = 3
pread(3, "\n\0\0\0GenuntelineI", 16, 0) = 16
pread(3, "\2\2(\7\0\0\0\0\0\0\0\0\3\5\0\0", 16, 65536) = 16
pread(3, "\2\2(\7\0\0\0\0\0\0\0\0\3\5\0\0", 16, 131072) = 16
pread(3, "\2\2(\7\0\0\0\0\0\0\0\0\3\5\0\0", 16, 196608) = 16
pread(3, "\2\2(\7\0\0\0\0\0\0\0\0\3\5\0\0", 16, 262144) = 16
pread(3, "\2\2(\7\0\0\0\0\0\0\0\0\3\5\0\0", 16, 327680) = 16
pread(3, "\2\2(\7\0\0\0\0\0\0\0\0\3\5\0\0", 16, 393216) = 16
... <cut> ...
pread(3, "\2\2(\7\0\0\0\0\0\0\0\0\3\5\0\0", 16, 4294705152) = 16
pread(3, "\2\2(\7\0\0\0\0\0\0\0\0\3\5\0\0", 16, 4294770688) = 16
pread(3, "\2\2(\7\0\0\0\0\0\0\0\0\3\5\0\0", 16, 4294836224) = 16
pread(3, "\2\2(\7\0\0\0\0\0\0\0\0\3\5\0\0", 16, 4294901760) = 16
exit_group(0) = ?
[/strace output]
Created attachment 31452 [details]
Fixed CPUID program (v3)
OK, stupid error on my part trying to fix another problem. Forgot to turn warnings on, that's why I didn't catch it in the first place.
Ok, this one (v3) looks definitly better ;) [cpuid output] cpuid 0: Leaf Subleaf EAX EBX ECX EDX 00000000 00000000: 0000000a .... 756e6547 Genu 6c65746e ntel 49656e69 ineI 00000001 00000000: 00010677 w... 00040800 .... 0008e3fd .... bfebfbff .... 00000002 00000000: 05b0b101 .... 005657f0 .WV. 00000000 .... 2cb43048 H0., 00000003 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000004 00000000: 0c000121 !... 01c0003f ?... 0000003f ?... 00000001 .... 00000004 00000001: 0c000122 "... 01c0003f ?... 0000003f ?... 00000001 .... 00000004 00000002: 0c004143 CA.. 02c0003f ?... 00000fff .... 00000001 .... 00000005 00000000: 00000040 @... 00000040 @... 00000003 .... 00000020 ... 00000006 00000000: 00000001 .... 00000002 .... 00000001 .... 00000000 .... 00000007 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000008 00000000: 00000400 .... 00000000 .... 00000000 .... 00000000 .... 00000009 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 0000000a 00000000: 07280202 ..(. 00000000 .... 00000000 .... 00000503 .... 80000000 00000000: 80000008 .... 00000000 .... 00000000 .... 00000000 .... 80000001 00000000: 00000000 .... 00000000 .... 00000001 .... 20100800 ... 80000002 00000000: 65746e49 Inte 2952286c l(R) 726f4320 Cor 4d542865 e(TM 80000003 00000000: 51203229 )2 Q 20646175 uad 55504320 CPU 51202020 Q 80000004 00000000: 30303339 9300 20402020 @ 30352e32 2.50 007a4847 GHz. 80000005 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 80000006 00000000: 00000000 .... 00000000 .... 0c006040 @`.. 00000000 .... 80000007 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 80000008 00000000: 00003024 $0.. 00000000 .... 00000000 .... 00000000 .... cpuid 1: Leaf Subleaf EAX EBX ECX EDX 00000000 00000000: 0000000a .... 756e6547 Genu 6c65746e ntel 49656e69 ineI 00000001 00000000: 00010677 w... 02040800 .... 0008e3fd .... bfebfbff .... 00000002 00000000: 05b0b101 .... 005657f0 .WV. 00000000 .... 2cb43048 H0., 00000003 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000004 00000000: 0c000121 !... 01c0003f ?... 0000003f ?... 00000001 .... 00000004 00000001: 0c000122 "... 01c0003f ?... 0000003f ?... 00000001 .... 00000004 00000002: 0c004143 CA.. 02c0003f ?... 00000fff .... 00000001 .... 00000005 00000000: 00000040 @... 00000040 @... 00000003 .... 00000020 ... 00000006 00000000: 00000001 .... 00000002 .... 00000001 .... 00000000 .... 00000007 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000008 00000000: 00000400 .... 00000000 .... 00000000 .... 00000000 .... 00000009 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 0000000a 00000000: 07280202 ..(. 00000000 .... 00000000 .... 00000503 .... 80000000 00000000: 80000008 .... 00000000 .... 00000000 .... 00000000 .... 80000001 00000000: 00000000 .... 00000000 .... 00000001 .... 20100800 ... 80000002 00000000: 65746e49 Inte 2952286c l(R) 726f4320 Cor 4d542865 e(TM 80000003 00000000: 51203229 )2 Q 20646175 uad 55504320 CPU 51202020 Q 80000004 00000000: 30303339 9300 20402020 @ 30352e32 2.50 007a4847 GHz. 80000005 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 80000006 00000000: 00000000 .... 00000000 .... 0c006040 @`.. 00000000 .... 80000007 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 80000008 00000000: 00003024 $0.. 00000000 .... 00000000 .... 00000000 .... cpuid 2: Leaf Subleaf EAX EBX ECX EDX 00000000 00000000: 0000000a .... 756e6547 Genu 6c65746e ntel 49656e69 ineI 00000001 00000000: 00010677 w... 01040800 .... 0008e3fd .... bfebfbff .... 00000002 00000000: 05b0b101 .... 005657f0 .WV. 00000000 .... 2cb43048 H0., 00000003 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000004 00000000: 0c000121 !... 01c0003f ?... 0000003f ?... 00000001 .... 00000004 00000001: 0c000122 "... 01c0003f ?... 0000003f ?... 00000001 .... 00000004 00000002: 0c004143 CA.. 02c0003f ?... 00000fff .... 00000001 .... 00000005 00000000: 00000040 @... 00000040 @... 00000003 .... 00000020 ... 00000006 00000000: 00000001 .... 00000002 .... 00000001 .... 00000000 .... 00000007 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000008 00000000: 00000400 .... 00000000 .... 00000000 .... 00000000 .... 00000009 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 0000000a 00000000: 07280202 ..(. 00000000 .... 00000000 .... 00000503 .... 80000000 00000000: 80000008 .... 00000000 .... 00000000 .... 00000000 .... 80000001 00000000: 00000000 .... 00000000 .... 00000001 .... 20100800 ... 80000002 00000000: 65746e49 Inte 2952286c l(R) 726f4320 Cor 4d542865 e(TM 80000003 00000000: 51203229 )2 Q 20646175 uad 55504320 CPU 51202020 Q 80000004 00000000: 30303339 9300 20402020 @ 30352e32 2.50 007a4847 GHz. 80000005 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 80000006 00000000: 00000000 .... 00000000 .... 0c006040 @`.. 00000000 .... 80000007 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 80000008 00000000: 00003024 $0.. 00000000 .... 00000000 .... 00000000 .... cpuid 3: Leaf Subleaf EAX EBX ECX EDX 00000000 00000000: 0000000a .... 756e6547 Genu 6c65746e ntel 49656e69 ineI 00000001 00000000: 00010677 w... 03040800 .... 0008e3fd .... bfebfbff .... 00000002 00000000: 05b0b101 .... 005657f0 .WV. 00000000 .... 2cb43048 H0., 00000003 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000004 00000000: 0c000121 !... 01c0003f ?... 0000003f ?... 00000001 .... 00000004 00000001: 0c000122 "... 01c0003f ?... 0000003f ?... 00000001 .... 00000004 00000002: 0c004143 CA.. 02c0003f ?... 00000fff .... 00000001 .... 00000005 00000000: 00000040 @... 00000040 @... 00000003 .... 00000020 ... 00000006 00000000: 00000001 .... 00000002 .... 00000001 .... 00000000 .... 00000007 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000008 00000000: 00000400 .... 00000000 .... 00000000 .... 00000000 .... 00000009 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 0000000a 00000000: 07280202 ..(. 00000000 .... 00000000 .... 00000503 .... 80000000 00000000: 80000008 .... 00000000 .... 00000000 .... 00000000 .... 80000001 00000000: 00000000 .... 00000000 .... 00000001 .... 20100800 ... 80000002 00000000: 65746e49 Inte 2952286c l(R) 726f4320 Cor 4d542865 e(TM 80000003 00000000: 51203229 )2 Q 20646175 uad 55504320 CPU 51202020 Q 80000004 00000000: 30303339 9300 20402020 @ 30352e32 2.50 007a4847 GHz. 80000005 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 80000006 00000000: 00000000 .... 00000000 .... 0c006040 @`.. 00000000 .... 80000007 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 80000008 00000000: 00003024 $0.. 00000000 .... 00000000 .... 00000000 .... [/cpuid output] cilie@cilie-laptop:~$ uname -a Linux cilie-laptop 2.6.36-020636rc4-generic #201009130905 SMP Mon Sep 13 10:15:27 UTC 2010 i686 GNU/Linux cilie@cilie-laptop:~$ ./cpuid -cpuid0 Leaf Subleaf EAX EBX ECX EDX 00000000 00000000: 0000000a .... 756e6547 Genu 6c65746e ntel 49656e69 ineI 00000001 00000000: 000106c2 .... 00020800 .... 0040c39d ..@. bfe9fbff .... 00000002 00000000: 4fba5901 .Y.O 0e3080c0 ..0. 00000000 .... 00000000 .... 00000003 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000004 00000000: 00004121 !A.. 0140003f ?.@. 0000003f ?... 00000001 .... 00000004 00000001: 00004122 "A.. 01c0003f ?... 0000003f ?... 00000001 .... 00000004 00000002: 00004143 CA.. 01c0003f ?... 000003ff .... 00000001 .... 00000005 00000000: 00000040 @... 00000040 @... 00000003 .... 00020220 ... 00000006 00000000: 00000001 .... 00000002 .... 00000001 .... 00000000 .... 00000007 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000008 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000009 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 0000000a 00000000: 07280203 ..(. 00000000 .... 00000000 .... 00002501 .%.. 80000000 00000000: 80000008 .... 00000000 .... 00000000 .... 00000000 .... 80000001 00000000: 00000000 .... 00000000 .... 00000001 .... 00100000 .... 80000002 00000000: 20202020 20202020 746e4920 Int 52286c65 el(R 80000003 00000000: 74412029 ) At 54286d6f om(T 4320294d M) C 4e205550 PU N 80000004 00000000: 20303732 270 20402020 @ 30362e31 1.60 007a4847 GHz. 80000005 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 80000006 00000000: 00000000 .... 00000000 .... 02008040 @... 00000000 .... 80000007 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 80000008 00000000: 00002020 .. 00000000 .... 00000000 .... 00000000 .... cilie@cilie-laptop:~$ ./cpuid -cpuid1 Leaf Subleaf EAX EBX ECX EDX 00000000 00000000: 0000000a .... 756e6547 Genu 6c65746e ntel 49656e69 ineI 00000001 00000000: 000106c2 .... 00020800 .... 0040c39d ..@. bfe9fbff .... 00000002 00000000: 4fba5901 .Y.O 0e3080c0 ..0. 00000000 .... 00000000 .... 00000003 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000004 00000000: 00004121 !A.. 0140003f ?.@. 0000003f ?... 00000001 .... 00000004 00000001: 00004122 "A.. 01c0003f ?... 0000003f ?... 00000001 .... 00000004 00000002: 00004143 CA.. 01c0003f ?... 000003ff .... 00000001 .... 00000005 00000000: 00000040 @... 00000040 @... 00000003 .... 00020220 ... 00000006 00000000: 00000001 .... 00000002 .... 00000001 .... 00000000 .... 00000007 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000008 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000009 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 0000000a 00000000: 07280203 ..(. 00000000 .... 00000000 .... 00002501 .%.. 80000000 00000000: 80000008 .... 00000000 .... 00000000 .... 00000000 .... 80000001 00000000: 00000000 .... 00000000 .... 00000001 .... 00100000 .... 80000002 00000000: 20202020 20202020 746e4920 Int 52286c65 el(R 80000003 00000000: 74412029 ) At 54286d6f om(T 4320294d M) C 4e205550 PU N 80000004 00000000: 20303732 270 20402020 @ 30362e31 1.60 007a4847 GHz. 80000005 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 80000006 00000000: 00000000 .... 00000000 .... 02008040 @... 00000000 .... 80000007 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 80000008 00000000: 00002020 .. 00000000 .... 00000000 .... 00000000 .... cpuid 0-4 on Intel(R) Core(TM) i5 CPU 650 @ 3.20GHz Leaf Subleaf EAX EBX ECX EDX 00000000 00000000: 0000000b .... 756e6547 Genu 6c65746e ntel 49656e69 ineI 00000001 00000000: 00020652 R... 00100800 .... 0298e3ff .... bfebfbff .... 00000002 00000000: 55035a01 .Z.U 00f0b2e3 .... 00000000 .... 09ca212c ,!.. 00000003 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000004 00000000: 1c004121 !A.. 01c0003f ?... 0000003f ?... 00000000 .... 00000005 00000000: 00000040 @... 00000040 @... 00000003 .... 00001120 ... 00000006 00000000: 00000007 .... 00000002 .... 00000001 .... 00000000 .... 00000007 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000008 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000009 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 0000000a 00000000: 07300403 ..0. 00000004 .... 00000000 .... 00000603 .... 0000000b 00000000: 00000001 .... 00000002 .... 00000100 .... 00000000 .... Leaf Subleaf EAX EBX ECX EDX 00000000 00000000: 0000000b .... 756e6547 Genu 6c65746e ntel 49656e69 ineI 00000001 00000000: 00020652 R... 04100800 .... 0298e3ff .... bfebfbff .... 00000002 00000000: 55035a01 .Z.U 00f0b2e3 .... 00000000 .... 09ca212c ,!.. 00000003 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000004 00000000: 1c004121 !A.. 01c0003f ?... 0000003f ?... 00000000 .... 00000005 00000000: 00000040 @... 00000040 @... 00000003 .... 00001120 ... 00000006 00000000: 00000007 .... 00000002 .... 00000001 .... 00000000 .... 00000007 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000008 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000009 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 0000000a 00000000: 07300403 ..0. 00000004 .... 00000000 .... 00000603 .... 0000000b 00000000: 00000001 .... 00000002 .... 00000100 .... 00000004 .... Leaf Subleaf EAX EBX ECX EDX 00000000 00000000: 0000000b .... 756e6547 Genu 6c65746e ntel 49656e69 ineI 00000001 00000000: 00020652 R... 01100800 .... 0298e3ff .... bfebfbff .... 00000002 00000000: 55035a01 .Z.U 00f0b2e3 .... 00000000 .... 09ca212c ,!.. 00000003 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000004 00000000: 1c004121 !A.. 01c0003f ?... 0000003f ?... 00000000 .... 00000005 00000000: 00000040 @... 00000040 @... 00000003 .... 00001120 ... 00000006 00000000: 00000007 .... 00000002 .... 00000001 .... 00000000 .... 00000007 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000008 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000009 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 0000000a 00000000: 07300403 ..0. 00000004 .... 00000000 .... 00000603 .... 0000000b 00000000: 00000001 .... 00000002 .... 00000100 .... 00000001 .... Leaf Subleaf EAX EBX ECX EDX 00000000 00000000: 0000000b .... 756e6547 Genu 6c65746e ntel 49656e69 ineI 00000001 00000000: 00020652 R... 05100800 .... 0298e3ff .... bfebfbff .... 00000002 00000000: 55035a01 .Z.U 00f0b2e3 .... 00000000 .... 09ca212c ,!.. 00000003 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000004 00000000: 1c004121 !A.. 01c0003f ?... 0000003f ?... 00000000 .... 00000005 00000000: 00000040 @... 00000040 @... 00000003 .... 00001120 ... 00000006 00000000: 00000007 .... 00000002 .... 00000001 .... 00000000 .... 00000007 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000008 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 00000009 00000000: 00000000 .... 00000000 .... 00000000 .... 00000000 .... 0000000a 00000000: 07300403 ..0. 00000004 .... 00000000 .... 00000603 .... 0000000b 00000000: 00000001 .... 00000002 .... 00000100 .... 00000005 .... On Monday, September 27, 2010, Boris Cuber wrote:
> Am Sunday 26 September 2010 schrieben Sie:
> > This message has been generated automatically as a part of a report
> > of regressions introduced between 2.6.34 and 2.6.35.
> >
> > The following bug entry is on the current list of known regressions
> > introduced between 2.6.34 and 2.6.35. Please verify if it still should
> > be listed and let the tracking team know (either way).
> >
> >
> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=16322
> > Subject : WARNING: at /arch/x86/include/asm/processor.h:1005
> > read_measured_perf_ctrs+0x5a/0x70() Submitter : boris64
> > <bugzilla.kernel.org@boris64.net>
> > Date : 2010-07-01 13:54 (88 days old)
> > Handled-By : H. Peter Anvin <hpa@zytor.com>
> Not fixed yet.
OK, I have managed to reproduce at least one variant of this problem locally... let's see if I can nail it down from here. Created attachment 31802 [details]
Patch, version 3
Okay, it turns out I had the right idea the first time, but I just made a slight mistake in the actual implementation (I thought get_cpu_cap() included the setting of cpuid_level, it turns out that it does not.)
Here is a fixed patch that resolves this problem on my test system. Please test it out, but since I have been able to confirm that it works locally on at least one system I'm going to push it to Linus.
I confirm that this patch works for me on my core2duo cpu. No warning anymore plus no more missing flags /proc/cpuinfo. Thanks for your time and effort Peter ;) Still not working on my i5-650: uname -a Linux i5-650 2.6.35.7 #1 SMP Wed Sep 29 07:12:59 CEST 2010 i686 GNU/Linux [ 1.390419] ------------[ cut here ]------------ [ 1.390481] WARNING: at /usr/src/linux-2.6.35.7/arch/x86/include/asm/processor.h:1005 read_measured_perf_ctrs+0x43/0x50() [ 1.390569] Hardware name: System Product Name [ 1.390614] Modules linked in: [ 1.390675] Pid: 422, comm: kondemand/2 Not tainted 2.6.35.7 #1 [ 1.390725] Call Trace: [ 1.390770] [<c1032d28>] ? warn_slowpath_common+0x78/0xb0 [ 1.390820] [<c1016fe3>] ? read_measured_perf_ctrs+0x43/0x50 [ 1.390869] [<c1016fe3>] ? read_measured_perf_ctrs+0x43/0x50 [ 1.390893] ------------[ cut here ]------------ [ 1.390897] WARNING: at /usr/src/linux-2.6.35.7/arch/x86/include/asm/processor.h:1005 read_measured_perf_ctrs+0x43/0x50() [ 1.390898] Hardware name: System Product Name [ 1.390899] Modules linked in: [ 1.390900] Pid: 423, comm: kondemand/3 Not tainted 2.6.35.7 #1 [ 1.390901] Call Trace: [ 1.390904] [<c1032d28>] ? warn_slowpath_common+0x78/0xb0 [ 1.390906] [<c1016fe3>] ? read_measured_perf_ctrs+0x43/0x50 [ 1.390907] [<c1016fe3>] ? read_measured_perf_ctrs+0x43/0x50 [ 1.390909] [<c1016fa0>] ? read_measured_perf_ctrs+0x0/0x50 [ 1.390911] [<c1032d7b>] ? warn_slowpath_null+0x1b/0x20 [ 1.390912] [<c1016fe3>] ? read_measured_perf_ctrs+0x43/0x50 [ 1.390916] [<c105a068>] ? smp_call_function_single+0x68/0x120 [ 1.390918] [<c1016ef0>] ? cpufreq_get_measured_perf+0x30/0xe0 [ 1.390920] [<c10372d6>] ? ns_to_timeval+0x6/0x20 [ 1.390923] [<c11a6c9f>] ? kobject_get+0xf/0x20 [ 1.390926] [<c1295302>] ? __cpufreq_driver_getavg+0x62/0x70 [ 1.390928] [<c1296d5c>] ? do_dbs_timer+0xdc/0x3f0 [ 1.390929] [<c1296c80>] ? do_dbs_timer+0x0/0x3f0 [ 1.390932] [<c104448f>] ? worker_thread+0xcf/0x160 [ 1.390934] [<c1047830>] ? autoremove_wake_function+0x0/0x40 [ 1.390935] [<c10443c0>] ? worker_thread+0x0/0x160 [ 1.390937] [<c10474b4>] ? kthread+0x74/0x80 [ 1.390938] [<c1047440>] ? kthread+0x0/0x80 [ 1.390940] [<c1002ff6>] ? kernel_thread_helper+0x6/0x10 [ 1.390942] ---[ end trace c524a9ecdd3a096a ]--- [ 1.392182] [<c1016fa0>] ? read_measured_perf_ctrs+0x0/0x50 [ 1.392231] [<c1032d7b>] ? warn_slowpath_null+0x1b/0x20 [ 1.392280] [<c1016fe3>] ? read_measured_perf_ctrs+0x43/0x50 [ 1.392331] [<c105a068>] ? smp_call_function_single+0x68/0x120 [ 1.392382] [<c1016ef0>] ? cpufreq_get_measured_perf+0x30/0xe0 [ 1.392432] [<c10372d6>] ? ns_to_timeval+0x6/0x20 [ 1.392480] [<c11a6c9f>] ? kobject_get+0xf/0x20 [ 1.392527] [<c1295302>] ? __cpufreq_driver_getavg+0x62/0x70 [ 1.392577] [<c1296d5c>] ? do_dbs_timer+0xdc/0x3f0 [ 1.392625] [<c1296c80>] ? do_dbs_timer+0x0/0x3f0 [ 1.392672] [<c104448f>] ? worker_thread+0xcf/0x160 [ 1.392721] [<c1047830>] ? autoremove_wake_function+0x0/0x40 [ 1.392771] [<c10443c0>] ? worker_thread+0x0/0x160 [ 1.392819] [<c10474b4>] ? kthread+0x74/0x80 [ 1.392866] [<c1047440>] ? kthread+0x0/0x80 [ 1.392912] [<c1002ff6>] ? kernel_thread_helper+0x6/0x10 [ 1.392960] ---[ end trace c524a9ecdd3a096b ]--- No luck with the patch in comment #90 here either on a machine with a sandybridge CPU, but disabling the "Enable CPUID limit" feature in bios makes the warnings go away as well. The "CPUID limit" thing is the fundamental problem -- what seems to not be working quite right is the part of the kernel which turns *off* the CPUID limit if it was found to be enabled. Robert and Alex: if you could please do the cpuid and rdmsr dump thing (I need both), that would be extremely useful. I would also like to know the exact systems that you both are on. Created attachment 31972 [details]
dmidecode
Created attachment 31982 [details]
/proc/cpuinfo
root@i5-650:/usr/src# rdmsr -cx -p 0 0x1a0 0x850089 root@i5-650:/usr/src# rdmsr -cx -p 1 0x1a0 0x850089 root@i5-650:/usr/src# rdmsr -cx -p 2 0x1a0 0x850089 root@i5-650:/usr/src# rdmsr -cx -p 3 0x1a0 0x850089 cpuid output already postet in #87 hope this helps Created attachment 32092 [details]
cpu info (cpuid and /proc/cpuinfo output)
info obtained on 2.6.35-22-generic x64 ubuntu kernel with the v3 patch applied and the bios option which causes the warning enabled.
rdmsr returns this for all 4 CPU's
0x850089
Alex, Robert: could you please put a printk() statement immediately after the call to get_cpu_cap() in arch/x86/kernel/cpu/intel.c and see if the printk appears in the resulting dmesg output? Something like this: printk(KERN_NOTICE "Uncapping CPUID on CPU#%d\n", smp_processor_id()); dmesg |grep Uncapping [ 0.244613] Uncapping CPUID on CPU#1 [ 0.352277] Uncapping CPUID on CPU#2 [ 0.459941] Uncapping CPUID on CPU#3 Hmm, no 0? Doesn't look like CPU #0 needed uncapping, or perhaps it just got run before printk is available unless you're using earlyprintk (the code gets run on CPU #0 *way* earlier than on the other CPUs.) hmm.. Something happend now. Before the Warning only happend once or twice about 30 seconds after boot. But on 2.6.36-rc6 it keeps on. See attached file. dmesg_2.6.36_rc6.txt Created attachment 32162 [details]
-rc6 dmesg.txt
-sorry #102 + #103 is probally bug 19062 This time I patched 2.6.36-rc6 with the patch in comment #90 and added the printk and I am not getting the warning that I was getting on the 2.6.35 based kernel, things appear to be working properly. [ 0.000000] Uncapping CPUID on CPU#0 [ 0.394873] Uncapping CPUID on CPU#1 [ 0.574638] Uncapping CPUID on CPU#2 [ 0.754400] Uncapping CPUID on CPU#3 With the 2.6.35.4 based kernel patched with the patch in comment #90 and the printk added the previous the warnings do indeed return, so it appears it does fix things on 2.6.36 but not .35 at least. Hm, okay. That makes more sense. I suspect 2.6.35 needs 1dedefd1a066a795a87afca9c0236e1a94de9bf6 from the 2.6.36 tree in addition to this patch. Could you try adding http://git.kernel.org/linus/1dedefd1a066a795a87afca9c0236e1a94de9bf6 ... in addition to patch #3 and see if this fixes the problem on 2.6.35? A fix that works on top of 2.6.36 is sufficient for marking this bug as resolved. Patch : https://bugzilla.kernel.org/attachment.cgi?id=31802 Yes, 1dedefd1a066a795a87afca9c0236e1a94de9bf6 and patch #3 works on 2.6.35 :) Thank you Alright, I think we have this one nailed. Finally. :) Email sent to the stable guys to request these patches be promoted into stable. I can confirm 1dedefd1a066a795a87afca9c0236e1a94de9bf6 and patchv3 works on 2.6.35 running on N270 atom hardware. /Thanks Fixed by commit d900329e20f4476db6461752accebcf7935a8055 . |
Created attachment 26987 [details] kernel .config While booting an up2date kernel from git i get the following warning: [ 1.604263] ------------[ cut here ]------------ [ 1.604270] WARNING: at /home/files/src/git-repos/linux-2.6-t3R/arch/x86/include/asm/processor.h:1005 read_measured_perf_ctrs+0x5a/0x70() [ 1.604272] Hardware name: P5K [ 1.604273] Modules linked in: [ 1.604277] Pid: 521, comm: kondemand/2 Not tainted 2.6.35-rc3-v2k11+-testing-00336-g980019d-dirty #160 [ 1.604279] Call Trace: [ 1.604284] [<ffffffff8103c04a>] warn_slowpath_common+0x7a/0xb0 [ 1.604288] [<ffffffff8101a330>] ? read_measured_perf_ctrs+0x0/0x70 [ 1.604291] [<ffffffff8103c095>] warn_slowpath_null+0x15/0x20 [ 1.604294] [<ffffffff8101a38a>] read_measured_perf_ctrs+0x5a/0x70 [ 1.604298] [<ffffffff81066fc3>] smp_call_function_single+0x83/0x170 [ 1.604301] [<ffffffff8101a2b7>] cpufreq_get_measured_perf+0x27/0xa0 [ 1.604305] [<ffffffff81435379>] __cpufreq_driver_getavg+0x59/0x80 [ 1.604309] [<ffffffff81437284>] do_dbs_timer+0xf4/0x3a0 [ 1.604312] [<ffffffff81437190>] ? do_dbs_timer+0x0/0x3a0 [ 1.604315] [<ffffffff8104fc71>] worker_thread+0x161/0x240 [ 1.604319] [<ffffffff810541f0>] ? autoremove_wake_function+0x0/0x40 [ 1.604322] [<ffffffff8104fb10>] ? worker_thread+0x0/0x240 [ 1.604325] [<ffffffff81053d5e>] kthread+0x8e/0xa0 [ 1.604329] [<ffffffff81003154>] kernel_thread_helper+0x4/0x10 [ 1.604332] [<ffffffff81053cd0>] ? kthread+0x0/0xa0 [ 1.604336] [<ffffffff81003150>] ? kernel_thread_helper+0x0/0x10 [ 1.604338] ---[ end trace f6ca9c5ff403e784 ]--- If you need more infos please tell me what you need. If i need to enable more debug stuff inside my kernel, tell me what to include!