From: "H. Peter Anvin" <hpa@zytor.com>
To: Len Brown <lenb@kernel.org>
Cc: linux-pm@lists.linux-foundation.org,
linux-kernel@vger.kernel.org, Len Brown <len.brown@intel.com>,
xen-devel@lists.xensource.com
Subject: Re: [PATCH 3/5] cpuidle: replace xen access to x86 pm_idle and default_idle
Date: Wed, 03 Aug 2011 15:35:40 -0700 [thread overview]
Message-ID: <4E39CD3C.8010801@zytor.com> (raw)
In-Reply-To: <0c70c6b12c37ececbfa9b7734495835514f273a4.1312400543.git.len.brown@intel.com>
On 08/03/2011 12:44 PM, Len Brown wrote:
> From: Len Brown <len.brown@intel.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@lists.xensource.com
> Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> Signed-off-by: Len Brown <len.brown@intel.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@linux.intel.com>
WARNING: multiple messages have this Message-ID (diff)
From: "H. Peter Anvin" <hpa@zytor.com>
To: Len Brown <lenb@kernel.org>
Cc: Len Brown <len.brown@intel.com>,
linux-pm@lists.linux-foundation.org,
xen-devel@lists.xensource.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/5] cpuidle: replace xen access to x86 pm_idle and default_idle
Date: Wed, 03 Aug 2011 15:35:40 -0700 [thread overview]
Message-ID: <4E39CD3C.8010801@zytor.com> (raw)
In-Reply-To: <0c70c6b12c37ececbfa9b7734495835514f273a4.1312400543.git.len.brown@intel.com>
On 08/03/2011 12:44 PM, Len Brown wrote:
> From: Len Brown <len.brown@intel.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@lists.xensource.com
> Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> Signed-off-by: Len Brown <len.brown@intel.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@linux.intel.com>
next prev parent reply other threads:[~2011-08-03 22:35 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-03 19:44 idle patch queue for Linux 3.1 Len Brown
2011-08-03 19:44 ` [PATCH 1/5] mrst_pmu: driver for Intel Moorestown Power Management Unit Len Brown
2011-08-03 19:44 ` [PATCH 2/5] cpuidle: create bootparam "cpuidle.off=1" Len Brown
2011-08-03 19:44 ` Len Brown
2011-08-03 19:44 ` [PATCH 3/5] cpuidle: replace xen access to x86 pm_idle and default_idle Len Brown
2011-08-03 22:35 ` H. Peter Anvin [this message]
2011-08-03 22:35 ` H. Peter Anvin
2011-08-03 22:35 ` H. Peter Anvin
2011-08-03 19:44 ` Len Brown
2011-08-03 19:44 ` [PATCH 4/5] x86 idle: move mwait_idle_with_hints() to where it is used Len Brown
2011-08-03 22:36 ` H. Peter Anvin
2011-08-03 22:36 ` H. Peter Anvin
2011-08-03 19:44 ` Len Brown
2011-08-03 19:44 ` [PATCH 5/5] cpuidle: stop depending on pm_idle Len Brown
2011-08-03 19:44 ` Len Brown
2011-08-03 22:36 ` H. Peter Anvin
2011-08-03 22:36 ` H. Peter Anvin
2011-08-04 17:21 ` Trinabh Gupta
2011-08-05 9:48 ` [linux-pm] " Deepthi Dharwar
2011-08-05 9:48 ` Deepthi Dharwar
2011-08-05 12:18 ` [PATCH 5/5] cpuidle: stop depending on pm_idle --build break Deepthi Dharwar
2011-08-05 12:18 ` [linux-pm] " Deepthi Dharwar
2011-08-03 23:04 ` [PATCH 1/5] mrst_pmu: driver for Intel Moorestown Power Management Unit H. Peter Anvin
2011-08-03 23:04 ` H. Peter Anvin
2011-08-03 19:44 ` Len Brown
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