linux-kernel - Re: [Patch] panic.c

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Message-ID: <20070805201428.GA18654@osiris.ibm.com>
Date:	Sun, 5 Aug 2007 22:14:28 +0200
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Jan Engelhardt <jengelh@...putergmbh.de>
Cc:	Jörg Hoffmann <jh2000@...t24.eu>,
	linux-kernel@...r.kernel.org
Subject: Re: [Patch] panic.c

> >The idea behind this is to keep the power usage on panicd machines
> >(without auto-reboot) low. Another point is in an Virtual Machine
> >environment the process of the VM is using 100% of the host-cpu. This
> >would stuck other programs or VMs. This patch brings the VM to stop and
> >keeps the cpu usage below 1%.

For VM environments it would be better to have an interface that tells
the hypervisor that your guest is dead. That's what the disabled_wait()
line in panic() is good for on s390.
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