linux-kernel - Re: [PATCH] oprofile: document undocumented oprofile.p4force argument

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Message-ID: <20080925201045.GK23557@erda.amd.com>
Date:	Thu, 25 Sep 2008 22:10:45 +0200
From:	Robert Richter <robert.richter@....com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	linux-kernel@...r.kernel.org, oprofile-list@...ts.sourceforge.net,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH] oprofile: document undocumented oprofile.p4force
	argument

On 20.08.08 18:40:33, Andi Kleen wrote:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> It's actually useless now, but document it anyways.

We should rework/remove this (maybe later), if it makes no longer
sense to keep it. If we had have a force_cpu_type implementation this
could be thrown away.

But as long as it is in it's better to have it documented.

-Robert

> 
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>
> ---
>  Documentation/kernel-parameters.txt |    6 ++++++
>  1 files changed, 6 insertions(+), 0 deletions(-)
> 
> diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
> index 10c8b1b..5e77e1a 100644
> --- a/Documentation/kernel-parameters.txt
> +++ b/Documentation/kernel-parameters.txt
> @@ -1491,6 +1491,12 @@ and is between 256 and 4096 characters. It is defined in the file
>  			in oprofile on Intel CPUs.  The kernel selects the
>  			correct default on its own.
>  
> +	oprofile.p4force=1 [X86]
> +			On Intel NetBurst CPUs assume new models are compatible
> +			to older ones. This might allow oprofile to be used when
> +			the kernel doesn't know the CPU, but is slightly dangerous.
> +			Should be obsolete by now.
> +
>  	osst=		[HW,SCSI] SCSI Tape Driver
>  			Format: <buffer_size>,<write_threshold>
>  			See also Documentation/scsi/st.txt.
> -- 
> 1.5.6
> 
> 

-- 
Advanced Micro Devices, Inc.
Operating System Research Center
email: robert.richter@....com

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