[Xen-devel] Re: [PATCH][BALLOON] Fix minimum target

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 27 May 2006, at 06:18, Puthiyaparambil, Aravindh wrote:

> We tried a few experiments with your 2% patch. We found that 2% is not
> good enough. The magic numbers seem to be 3% for DomUs and 5% for Dom0.
> Any idea why the difference in percentages?
The minimum should probably include a fixed-size base value, plus some 
percentage of maximum possible memory size. The patch I applied does 
not include the fixed-size base value as it isn't obvious what to set 
it to.
The percentage you need (5%) for domain0 may appear bigger for a few 
reasons:
 * There's a bigger static allocation of memory in domain0, independent 
of maximum memory size
 * You allocate less initial memory to domain0, so the fixed-size 
reserved memory is a bigger proprtion of total reserved memory.
What happens if you set the min to 16MB + 2% of max-mem?

 -- Keir

> If this patch is fine by you, could you please apply to both
> xen-unstable and xen-3.0-testing?

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