On Wed, 18 Oct 2017, Guenter Roeck wrote:
> On 10/18/2017 07:28 PM, Shu Wang wrote:
> > > > > > Fix kernel warning on my 4cpus 2core_id system. The cpu0 and cpu1
> > > > > > have same core_id 0, so both cpu0 and cpu1 will try to create file
> > > > > > temp2_label when it's online.
> > > > > >
> > > > >
> > > > > > - coretemp_cpu_online(cpu=0)
> > > > > > - create_core_data(cpu=0, attr_no=2)
> > > > > > - create_core_attrs(attr_no=2)
> > > > > > - coretemp_cpu_online(cpu=1)
> > > > > > - create_core_data(cpu=1, attr_no=2)
> > > > > > - create_core_attrs(attr_no=2)
> > > > > >
> > > > > > $ grep -e processor -e 'core id' /proc/cpuinfo
> > > > > > processor : 0
> > > > > > core id : 0
> > > > > > processor : 1
> > > > > > core id : 0
> > > > > > processor : 2
> > > > > > core id : 1
> > > > > > processor : 3
> > > > > > core id : 1
> > > > >
> > > > > Complete output of /proc/cpuinfo might be helpful.
> > > >
> > > > $ cat /proc/cpuinfo
> > > > processor : 0
> > > > vendor_id : GenuineIntel
> > > > cpu family : 6
> > > > model : 61
> > > > model name : Intel(R) Core(TM) i7-5600U CPU @ 2.60GHz
> > >
> > > This is a hyperthreading CPU, which should already be handled,
> >
> > Do you mean that for my system, coretemp_cpu_online should only
> > be called twice instead of four times to create two core attrs?
> >
>
> coretemp_add_core() should only be called twice, and cpumask_intersects()
> should filter out the duplicate ones.
>
> /*
> * Check whether a thread sibling is already online. If not add the
> * interface for this CPU core.
> */
> if (!cpumask_intersects(&pdata->cpumask,
> topology_sibling_cpumask(cpu)))
> coretemp_add_core(pdev, cpu, 0);
>
> Thomas, is it possible that something is wrong with this code ?
Hrmm. Not that I can see. The only thing I can think of is that the logical
package association of the CPUs is screwed.
Debug patch below.
Thanks,
tglx
8<------------
--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -611,6 +611,9 @@ static int coretemp_cpu_online(unsigned
if (cpuhp_tasks_frozen)
return 0;
+ pr_info("CPU %u %u pkgid %d\n", cpu, smp_processor_id(),
+ topology_logical_package_id(cpu));
+
/*
* CPUID.06H.EAX[0] indicates whether the CPU has thermal
* sensors. We check this bit only, all the early CPUs
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