Re: [Xen-devel] [PATCH 2/2] libxl: xl mem-set should not enforce memory limits

[George Dunlap <dunlapg@xxxxxxxxx>]

On Fri, Mar 15, 2013 at 5:09 PM, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx> wrote:
> Daniel Kiper writes ("Re: [PATCH 2/2] libxl: xl mem-set should not enforce 
> memory limits"):
>> I think that xl mem-max should be used to enforce limits. If admin
>> would like to enforce "hard" limit it should call xl mem-set and
>> xl mem-max in sequence. If we would like to leave old xl mem-set
>> behavior we should change comment for this command because now
>> it does not mention anythig about limit enforcement. Or we should
>> add an option which explicitly disables memory limit enforment
>> (this behavior is in line with xm mem-set behavior).
>
> I think this conversation is related to the fact that at Oracle you
> have a different model of the Xen memory allocation model to everyone
> else.
>
> Outside Oracle, guests are supposed to aim for the balloon target and
> are not permitted to exceed it (when ballooning up) or to regress
> (when ballooning down).

Would it make sense to make the current behavior the default, but have
it override-able by a configuration variable in xl.conf?

 -George

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