linux-kernel - Re: [RFC 2/2] KVM: add virtio-pmem driver

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Message-ID: <20171017071633.GA9207@infradead.org>
Date:   Tue, 17 Oct 2017 00:16:33 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Pankaj Gupta <pagupta@...hat.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        qemu-devel@...gnu.org, linux-nvdimm@...1.01.org,
        linux-mm@...ck.org, jack@...e.cz, stefanha@...hat.com,
        dan.j.williams@...el.com, riel@...hat.com,
        haozhong.zhang@...el.com, nilal@...hat.com, kwolf@...hat.com,
        pbonzini@...hat.com, ross.zwisler@...el.com, david@...hat.com,
        xiaoguangrong.eric@...il.com
Subject: Re: [RFC 2/2] KVM: add virtio-pmem driver

I think this driver is at entirely the wrong level.

If you want to expose pmem to a guest with flushing assist do it
as pmem, and not a block driver.