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Date:   Tue, 26 Jan 2021 17:11:21 +0000
From:   Wei Liu <wei.liu@kernel.org>
To:     Sunil Muthuswamy <sunilmut@microsoft.com>
Cc:     Matheus Castello <matheus@castello.eng.br>,
        "linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        Stephen Hemminger <sthemmin@microsoft.com>,
        Wei Liu <liuwe@microsoft.com>,
        Michael Kelley <mikelley@microsoft.com>,
        Tianyu Lan <Tianyu.Lan@microsoft.com>,
        Wei Liu <wei.liu@kernel.org>, vkuznets <vkuznets@redhat.com>,
        KY Srinivasan <kys@microsoft.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3] x86/Hyper-V: Support for free page reporting
Message-ID: <20210126171121.ujxojhmkjhuilry6@liuwe-devbox-debian-v2>
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On Wed, Jan 06, 2021 at 11:20:33PM +0000, Sunil Muthuswamy wrote:
> Linux has support for free page reporting now (36e66c554b5c) for
> virtualized environment. On Hyper-V when virtually backed VMs are
> configured, Hyper-V will advertise cold memory discard capability,
> when supported. This patch adds the support to hook into the free
> page reporting infrastructure and leverage the Hyper-V cold memory
> discard hint hypercall to report/free these pages back to the host.
> 
> Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com>
> Tested-by: Matheus Castello <matheus@castello.eng.br>

Reviewed-by: Wei Liu <wei.liu@kernel.org>