Re: [Qemu-devel] [QEMU 3/7] Add the hmp and qmp interface for dropping cache

[Paolo Bonzini]

On 13/06/2016 12:50, Daniel P. Berrange wrote:
> More generally, it feels like this is taking as down a path towards
> actively managing the guest kernel VM from the host. Is this really
> a path we want to be going down, given that its going to take us into
> increasing non-portable concepts which are potentially different for
> each guest OS kernel.  Is this drop caches feature at all applicable
> to Windows, OS-X, *BSD guest OS impls of the balloon driver ? If it
> is applicable, are the 3 fixed constants you've defined at all useful
> to those other OS ?
> 
> I'm warying of us taking a design path which is so Linux specific it
> isn't useful elsewhere. IOW, just because we can do this, doesn't mean
> we should do this...

I agree.  And if anything, this should be handled through the guest agent.

Paolo