linux-kernel - Re: [RFC PATCH v3 11/21] x86/watchdog/hardlockup: Add an HPET-based hardlockup detector

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Message-ID: <20190515155637.GC10526@ranerica-svr.sc.intel.com>
Date:   Wed, 15 May 2019 08:56:37 -0700
From:   Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>, Borislav Petkov <bp@...e.de>,
        Ashok Raj <ashok.raj@...el.com>,
        Joerg Roedel <joro@...tes.org>,
        Andi Kleen <andi.kleen@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        "Ravi V. Shankar" <ravi.v.shankar@...el.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
        Ricardo Neri <ricardo.neri@...el.com>,
        "H. Peter Anvin" <hpa@...or.com>, Tony Luck <tony.luck@...el.com>,
        Clemens Ladisch <clemens@...isch.de>,
        Arnd Bergmann <arnd@...db.de>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Jan Kiszka <jan.kiszka@...mens.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Nayna Jain <nayna@...ux.ibm.com>,
        Stephane Eranian <eranian@...gle.com>,
        Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
Subject: Re: [RFC PATCH v3 11/21] x86/watchdog/hardlockup: Add an HPET-based
 hardlockup detector

On Tue, May 14, 2019 at 07:26:58AM -0700, Randy Dunlap wrote:
> On 5/14/19 7:02 AM, Ricardo Neri wrote:
> > diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
> > index 15d0fbe27872..376a5db81aec 100644
> > --- a/arch/x86/Kconfig.debug
> > +++ b/arch/x86/Kconfig.debug
> > @@ -169,6 +169,17 @@ config IOMMU_LEAK
> >  config HAVE_MMIOTRACE_SUPPORT
> >  	def_bool y
> >  
> > +config X86_HARDLOCKUP_DETECTOR_HPET
> > +	bool "Use HPET Timer for Hard Lockup Detection"
> > +	select SOFTLOCKUP_DETECTOR
> > +	select HARDLOCKUP_DETECTOR
> > +	select HARDLOCKUP_DETECTOR_CORE
> > +	depends on HPET_TIMER && HPET && X86_64
> > +	help
> > +	  Say y to enable a hardlockup detector that is driven by an High-
> 
> 	                                                       by a
> 
I'll correct.

Thanks and BR,
Ricardo