- Original Message -
From: "Chris Metcalf"
[...]
> On 04/22/2015 04:20 AM, Ulrich Obergfell wrote:
>> Chris,
>>
>> in principle the change looks o.k. to me, even though I'm not really familiar
>> with the watchdog_nmi_disable_all() and watchdog_nmi_enable_all() functions.
>> It is my under
On 04/22/2015 04:20 AM, Ulrich Obergfell wrote:
Chris,
in principle the change looks o.k. to me, even though I'm not really familiar
with the watchdog_nmi_disable_all() and watchdog_nmi_enable_all() functions.
It is my understanding that those functions are only called once via 'initcall'
early
Chris,
in principle the change looks o.k. to me, even though I'm not really familiar
with the watchdog_nmi_disable_all() and watchdog_nmi_enable_all() functions.
It is my understanding that those functions are only called once via 'initcall'
early during kernel startup as shown in the following f
On 04/16/2015 09:31 PM, Chai Wen wrote:
On 04/15/2015 03:37 AM, Chris Metcalf wrote:
+/*
+ * The cpumask is the mask of possible cpus that the watchdog can run
+ * on, not the mask of cpus it is actually running on. This allows the
+ * user to specify a mask that will include cpus that have not
On 04/16/2015 06:46 AM, Ulrich Obergfell wrote:
if a user changes watchdog parameters in /proc/sys/kernel, the watchdog threads
are not stopped and restarted in all cases. Parameters can also be changed 'on
the fly', for example like 'watchdog_thresh' in the following flow of execution:
proc_
On 04/15/2015 03:37 AM, Chris Metcalf wrote:
> Change the default behavior of watchdog so it only runs on the
> housekeeping cores when nohz_full is enabled at build and boot time.
> Allow modifying the set of cores the watchdog is currently running
> on with a new kernel.watchdog_cpumask sysctl.
k you also need to
review watchdog_nmi_disable_all() and watchdog_nmi_enable_all() because those
functions call for_each_online_cpu() too.
Regards,
Uli
Subject: [PATCH v8 2/3] watchdog: add watchdog_cpumask sysctl to assist nohz
Change the default behavior of watchdog so it only runs on the
hou
Change the default behavior of watchdog so it only runs on the
housekeeping cores when nohz_full is enabled at build and boot time.
Allow modifying the set of cores the watchdog is currently running
on with a new kernel.watchdog_cpumask sysctl.
If we allowed the watchdog to run on nohz_full cores,
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