Re: [PATCH] x86: use 'dom0_mem' to limit the number of pages for dom0

[David Vrabel <david.vrabel@citrix.com>]

Keir,

Since Konrad is considering submitting the Linux kernel patch needing
this Xen patch to the 3.0 stable tree, I think this should be a
candidate for Xen 4.1.2.

Thanks.

David

On 15/08/11 19:08, David Vrabel wrote:
> # HG changeset patch
> # User David Vrabel <david.vrabel@citrix.com>
> # Date 1313404957 -3600
> # Node ID 1ec6c392d40f37032b0c845094c7ee6ba69740fd
> # Parent  8d6edc3d26d26931f3732a2008fb4818bc7bab2d
> x86: use 'dom0_mem' to limit the number of pages for dom0
> 
> Use the 'dom0_mem' command line option to set the maximum number of
> pages for dom0.  dom0 can use then use the XENMEM_maximum_reservation
> memory op to automatically find this limit and reduce the size of any
> page tables etc.
> 
> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
> 
> diff -r 8d6edc3d26d2 -r 1ec6c392d40f xen/arch/x86/domain_build.c
> --- a/xen/arch/x86/domain_build.c	Sat Aug 13 10:14:58 2011 +0100
> +++ b/xen/arch/x86/domain_build.c	Mon Aug 15 11:42:37 2011 +0100
> @@ -254,6 +254,8 @@ static unsigned long __init compute_dom0
>      }
>  #endif
>  
> +    d->max_pages = min(max_pages, avail);
> +
>      return nr_pages;
>  }
>  
> 
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