Re: [RFC PATCH 16/23] watchdog/hardlockup: Add an HPET-based hardlockup detector
From: Randy Dunlap <hidden>
Date: 2018-06-13 05:24:18
Also in:
linux-iommu, lkml, sparclinux
Hi, On 06/12/2018 05:57 PM, Ricardo Neri wrote:
quoted hunk ↗ jump to hunk
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index c40c7b7..6e79833 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug@@ -828,6 +828,16 @@ config HARDLOCKUP_DETECTOR_PERF bool select SOFTLOCKUP_DETECTOR +config HARDLOCKUP_DETECTOR_HPET + bool "Use HPET Timer for Hard Lockup Detection" + select SOFTLOCKUP_DETECTOR + select HARDLOCKUP_DETECTOR + depends on HPET_TIMER && HPET + help + Say y to enable a hardlockup detector that is driven by an High-Precision + Event Timer. In addition to selecting this option, the command-line + parameter nmi_watchdog option. See Documentation/admin-guide/kernel-parameters.rst
The "In addition ..." thing is a broken (incomplete) sentence.
+ # # Enables a timestamp based low pass filter to compensate for perf based # hard lockup detection which runs too fast due to turbo modes.
-- ~Randy