Re: [Xen-devel] [PATCH] Make "xm mem-set" be lower bound ondomX-min-mem

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 20 May 2006, at 16:14, Puthiyaparambil, Aravindh wrote:

> In lieu of the recent emails about ballooning, do you still want me to
> look into making the balloon driver back off when it goes down the OOM
> path? Or is it better for that too to be taken care of by some of the
> higher level management tools?
The OS itself can tell best whether a given memory target is too 
restrictive and will cause major problems. So hooking off the OOM paths 
does make sense. The "2% test" is a suitable static check for now -- it 
might make sense to keep it even when we do have a more dynamic 
detection and backoff method. These in-kernel checks can complement 
safety catches in higher-level management tools which might stop a user 
from e.g. setting a target that is too low for Linux and prevent that 
target from ever being passed to the guest.
 -- Keir


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