linux-kernel - Re: [PATCH 2/3] watchdog: control hard lockup detection default

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Message-ID: <53D0F1EB.9080504@redhat.com>
Date:	Thu, 24 Jul 2014 13:45:47 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Ulrich Obergfell <uobergfe@...hat.com>
CC:	Andrew Jones <drjones@...hat.com>, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org, dzickus@...hat.com, akpm@...ux-foundation.org,
	mingo@...hat.com
Subject: Re: [PATCH 2/3] watchdog: control hard lockup detection default

Il 24/07/2014 13:44, Ulrich Obergfell ha scritto:
> > But this means that it is not possible to re-enable softlockup detection
> > only.  I think that should be the effect of echo 0 + echo 1, if
> > hardlockup detection was disabled by either the command line or patch 3.
>
> The idea was to give the user two options to override the effect of patch 3/3.
> Either via the kernel command line ('nmi_watchdog=') at boot time or via /proc
> ('echo 0' + 'echo 1') when the system is up and running.

I think the kernel command line is enough; another alternative is to
split the nmi_watchdog /proc entry in two.

Paolo
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