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

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [QEMU 3/7] Add the hmp and qmp interface for dropping cache
Date: Mon, 13 Jun 2016 13:41:47 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.0

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.


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