linux-kernel - Re: [PATCH 3/5] cpuidle: replace xen access to x86 pm_idle and default

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Message-ID: <4E39CD3C.8010801@zytor.com>
Date:	Wed, 03 Aug 2011 15:35:40 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Len Brown <lenb@...nel.org>
CC:	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	Len Brown <len.brown@...el.com>, xen-devel@...ts.xensource.com
Subject: Re: [PATCH 3/5] cpuidle: replace xen access to x86 pm_idle and default_idle

On 08/03/2011 12:44 PM, Len Brown wrote:
> From: Len Brown <len.brown@...el.com>
> 
> When a Xen Dom0 kernel boots on a hypervisor, it gets access
> to the raw-hardware ACPI tables.  While it parses the idle tables
> for the hypervisor's beneift, it uses HLT for its own idle.
> 
> Rather than have xen scribble on pm_idle and access default_idle,
> have it simply disable_cpuidle() so acpi_idle will not load and
> architecture default HLT will be used.
> 
> cc: xen-devel@...ts.xensource.com
> Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> Signed-off-by: Len Brown <len.brown@...el.com>
> ---
>  arch/x86/xen/setup.c      |    3 ++-
>  drivers/cpuidle/cpuidle.c |    4 ++++
>  include/linux/cpuidle.h   |    2 ++
>  3 files changed, 8 insertions(+), 1 deletions(-)
> 

Acked-by: H. Peter Anvin <hpa@...ux.intel.com>

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