RE: [Xen-ia64-devel] Shortage of Xen heap problem

["Magenheimer, Dan (HP Labs Fort Collins)" <dan.magenheimer@xxxxxx>]

Is it assumed that the entire Xen heap is mapped by
a TR?   If so, expanding the Xen heap size might
cause problems. 

> -----Original Message-----
> From: xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf 
> Of Masaki Kanno
> Sent: Tuesday, December 20, 2005 1:11 AM
> To: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-ia64-devel] Shortage of Xen heap problem
> 
> Hi,
> 
> When Xen SMP is supported, it becomes Xen heap shortage with 
> 3 CPUs or more.
> Because Xen heap is required 16MB per CPU for VHPT. 
> (Refer to attached file Xenheapshortage.txt)
> 
> I think that I will expand the size of Xen heap according to 
> the value of NR_CPUS. 
> I have the idea as follows.
> 
> #ifdef CONFIG_SMP
>   Xen heap size = 63MB(default) + 16MB * NR_CPUS;
> #else
>   Xen heap size = 63MB(default);
> #endif
> 
> Any idea and comment?
> 
> Best Regards,
>  Kan
> 
> 

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