eixner; linux-arm-ker...@lists.infradead.org
> Subject: Re: [PATCH] hardlockup: detect hard lockups without NMIs using
> secondary cpus
>
> On Thu, Jan 10, 2013 at 9:57 PM, Liu, Chuansheng
> wrote:
> >
> >
> >> -Original Message-
> >> From: ccr...@google.com
kernel@vger.kernel.org; Andrew Morton; Don Zickus; Ingo Molnar;
>> Thomas Gleixner; linux-arm-ker...@lists.infradead.org
>> Subject: Re: [PATCH] hardlockup: detect hard lockups without NMIs using
>> secondary cpus
>>
>> On Thu, Jan 10, 2013 at 5:39 PM, Liu, Chuansheng
>&
eixner; linux-arm-ker...@lists.infradead.org
> Subject: Re: [PATCH] hardlockup: detect hard lockups without NMIs using
> secondary cpus
>
> On Thu, Jan 10, 2013 at 5:39 PM, Liu, Chuansheng
> wrote:
> >
> >
> >> -Original Message-
> >> From: Colin Cross [mailto
s; Ingo Molnar; Thomas Gleixner; Liu,
>> Chuansheng; linux-arm-ker...@lists.infradead.org; Colin Cross
>> Subject: [PATCH] hardlockup: detect hard lockups without NMIs using
>> secondary cpus
>>
>> Emulate NMIs on systems where they are not available by using timer
>> i
in Cross
> Subject: [PATCH] hardlockup: detect hard lockups without NMIs using
> secondary cpus
>
> Emulate NMIs on systems where they are not available by using timer
> interrupts on other cpus. Each cpu will use its softlockup hrtimer
> to check that the next cpu is processi
* Colin Cross [130110 14:37]:
> On Thu, Jan 10, 2013 at 12:38 PM, Tony Lindgren wrote:
> >
> > * Colin Cross [130109 18:05]:
> > > +static void watchdog_check_hardlockup_other_cpu(void)
> > > +{
> > > + int cpu;
> > > + cpumask_t cpus = watchdog_cpus;
> > > +
> > > + /*
> > > +
On Thu, Jan 10, 2013 at 12:38 PM, Tony Lindgren wrote:
>
> * Colin Cross [130109 18:05]:
> > +static void watchdog_check_hardlockup_other_cpu(void)
> > +{
> > + int cpu;
> > + cpumask_t cpus = watchdog_cpus;
> > +
> > + /*
> > + * Test for hardlockups every 3 samples. The sample
* Colin Cross [130109 18:05]:
> +static void watchdog_check_hardlockup_other_cpu(void)
> +{
> + int cpu;
> + cpumask_t cpus = watchdog_cpus;
> +
> + /*
> + * Test for hardlockups every 3 samples. The sample period is
> + * watchdog_thresh * 2 / 5, so 3 samples gets us back
On Thu, Jan 10, 2013 at 09:27:28AM -0800, Colin Cross wrote:
> On Thu, Jan 10, 2013 at 6:02 AM, Don Zickus wrote:
> > On Wed, Jan 09, 2013 at 05:57:39PM -0800, Colin Cross wrote:
> >> Emulate NMIs on systems where they are not available by using timer
> >> interrupts on other cpus. Each cpu will
On Thu, Jan 10, 2013 at 6:02 AM, Don Zickus wrote:
> On Wed, Jan 09, 2013 at 05:57:39PM -0800, Colin Cross wrote:
>> Emulate NMIs on systems where they are not available by using timer
>> interrupts on other cpus. Each cpu will use its softlockup hrtimer
>> to check that the next cpu is processin
On Thu, Jan 10, 2013 at 05:18:40PM +0100, Frederic Weisbecker wrote:
> 2013/1/10 Russell King - ARM Linux :
> > On Thu, Jan 10, 2013 at 09:02:15AM -0500, Don Zickus wrote:
> >> On Wed, Jan 09, 2013 at 05:57:39PM -0800, Colin Cross wrote:
> >> > Emulate NMIs on systems where they are not available b
2013/1/10 Russell King - ARM Linux :
> On Thu, Jan 10, 2013 at 09:02:15AM -0500, Don Zickus wrote:
>> On Wed, Jan 09, 2013 at 05:57:39PM -0800, Colin Cross wrote:
>> > Emulate NMIs on systems where they are not available by using timer
>> > interrupts on other cpus. Each cpu will use its softlocku
On Thu, Jan 10, 2013 at 09:02:15AM -0500, Don Zickus wrote:
> On Wed, Jan 09, 2013 at 05:57:39PM -0800, Colin Cross wrote:
> > Emulate NMIs on systems where they are not available by using timer
> > interrupts on other cpus. Each cpu will use its softlockup hrtimer
> > to check that the next cpu i
On Wed, Jan 09, 2013 at 05:57:39PM -0800, Colin Cross wrote:
> Emulate NMIs on systems where they are not available by using timer
> interrupts on other cpus. Each cpu will use its softlockup hrtimer
> to check that the next cpu is processing hrtimer interrupts by
> verifying that a counter is inc
Emulate NMIs on systems where they are not available by using timer
interrupts on other cpus. Each cpu will use its softlockup hrtimer
to check that the next cpu is processing hrtimer interrupts by
verifying that a counter is increasing.
This patch is useful on systems where the hardlockup detect
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