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Re: [Qemu-devel] KVM "fake DAX" flushing interface - discussion


From: Rik van Riel
Subject: Re: [Qemu-devel] KVM "fake DAX" flushing interface - discussion
Date: Wed, 26 Jul 2017 17:27:33 -0400

On Wed, 2017-07-26 at 09:47 -0400, Pankaj Gupta wrote:
> > 
> Just want to summarize here(high level):
> 
> This will require implementing new 'virtio-pmem' device which
> presents 
> a DAX address range(like pmem) to guest with read/write(direct
> access)
> & device flush functionality. Also, qemu should implement
> corresponding
> support for flush using virtio.
> 
Alternatively, the existing pmem code, with
a flush-only block device on the side, which
is somehow associated with the pmem device.

I wonder which alternative leads to the least
code duplication, and the least maintenance
hassle going forward.

-- 
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