linux-kernel - Re: [RFC PATCH 04/33] Add XEN config options and disable unsupported config options.

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Message-Id: <1153216752.3038.20.camel@laptopd505.fenrus.org>
Date:	Tue, 18 Jul 2006 11:59:12 +0200
From:	Arjan van de Ven <arjan@...radead.org>
To:	Chris Wright <chrisw@...s-sol.org>
Cc:	linux-kernel@...r.kernel.org, virtualization@...ts.osdl.org,
	xen-devel@...ts.xensource.com,
	Jeremy Fitzhardinge <jeremy@...p.org>, Andi Kleen <ak@...e.de>,
	Andrew Morton <akpm@...l.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Zachary Amsden <zach@...are.com>,
	Ian Pratt <ian.pratt@...source.com>,
	Christian Limpach <Christian.Limpach@...cam.ac.uk>
Subject: Re: [RFC PATCH 04/33] Add XEN config options and disable
	unsupported config options.


> The disabled config options are:
> - DOUBLEFAULT: are trapped by Xen and not virtualized
> - HZ: defaults to 100 in Xen VMs

Hi,

this makes no real sense with dynamic ticks coming up... HZ=1000 should
be perfectly fine then...

>  config KEXEC
>  	bool "kexec system call (EXPERIMENTAL)"
> -	depends on EXPERIMENTAL
> +	depends on EXPERIMENTAL && !X86_XEN
>  	help
>  	  kexec is a system call that implements the ability to shutdown your
>  	  current kernel, and to start another kernel.  It is like a reboot

hmmm why is kexec incompatible with xen? Don't you want to support crash
dumps from guests?

> +config XEN_SHADOW_MODE
> +	bool
> +	default y
> +	help
> +	  Fakes out a shadow mode kernel
> +

this probably wants a better description...


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