Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory)

[Chandra Seetharaman <sekharan@us.ibm.com>]

On Fri, 2006-09-15 at 12:49 +0400, Kirill Korotaev wrote:
> > <snip>
> > 
> >>Reserving in advance means that sometimes you won't be able to start a
> >>new group without taking back some of reserved pages. This is ... strange.
> > 
> > 
> > I do not see it strange. At the time of creation, user sees the failure
> > (that there isn't enough resource to provide the required/requested
> > guarantee) and can act accordingly.
> > 
> > BTW, VMware does it this way.
> This is not true at least for ESX server.

Hmm, from what I have seen, in ESX server, creation of a VM will fail,
if the specified guarantees cannot meet at the time of creation.
 
> It overcommits memory and does dirty tricks like balooning to free memory then.

This is how they handle over commit, which is not what I was talking
about.

<snip>

-- 

----------------------------------------------------------------------
    Chandra Seetharaman               | Be careful what you choose....
              - sekharan@us.ibm.com   |      .......you may get it.
----------------------------------------------------------------------


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