linux-kernel - Re: [RFC PATCH 2/4] kvm: Add host side support for free memory hints

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Message-ID: <39c915a7-e317-db01-0286-579230f37da2@intel.com>
Date:   Mon, 11 Feb 2019 09:41:19 -0800
From:   Dave Hansen <dave.hansen@...el.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>,
        Alexander Duyck <alexander.duyck@...il.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, rkrcmar@...hat.com,
        alexander.h.duyck@...ux.intel.com, x86@...nel.org,
        mingo@...hat.com, bp@...en8.de, hpa@...or.com, pbonzini@...hat.com,
        tglx@...utronix.de, akpm@...ux-foundation.org
Subject: Re: [RFC PATCH 2/4] kvm: Add host side support for free memory hints

On 2/9/19 4:44 PM, Michael S. Tsirkin wrote:
> So the policy should not leak into host/guest interface.
> Instead it is better to just keep the pages pinned and
> ignore the hint for now.

It does seems a bit silly to have guests forever hinting about freed
memory when the host never has a hope of doing anything about it.

Is that part fixable?