On Thu, 1 May 2008 01:00:34 -0700 Yinghai Lu wrote:

quoted text
> 
> loop mtrr chunk_size and gran_size from 1M to 2G to find out optimal value.

What size step (increment) is used for these loops?

quoted text
> so user don't need to add mtrr_chunk_size and mtrr_gran_size, 
> 
> if optimal value is not found, print out all list to help select less optimal
> value.
> 
> add mtrr_spare_reg_nr= so user could set 2 instead of 1, if the card need more entries.
> 
> Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
> 

quoted text
> Index: linux-2.6/Documentation/kernel-parameters.txt
> ===================================================================
> --- linux-2.6.orig/Documentation/kernel-parameters.txt
> +++ linux-2.6/Documentation/kernel-parameters.txt
> @@ -613,9 +613,17 @@ and is between 256 and 4096 characters. 
>  			that could hold holes aka. UC entries.
>  
>  	mtrr_gran_size=nn[KMG] [X86]
> -			used for mtrr cleanup. It is granity of mtrr block.
> +			used for mtrr cleanup. It is granularity of mtrr block.
> +			default is 1.

                        Default

quoted text
>  			Big value could prevent small alignment use up MTRRs.

			Large value could prevent small alignment from
			using up MTRRs.

quoted text
>  
> +	mtrr_spare_reg_nr=n [X86]
> +			Format: <integer>
> +			range: 0,7 : spare reg number
> +			default : 1
> +			used for mtrr cleanup. It is spare mtrr entries number.

			Used

quoted text
> +			set to 2 or more if your graphical card need more.

			Set                                     needs more.

quoted text
> +
>  	disable_mtrr_trim [X86, Intel and AMD only]
>  			By default the kernel will trim any uncacheable
>  			memory out of your available memory pool based on


---
~Randy
--
unsubscribe notice
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/