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Subject: Re: [virtio-dev] [PATCH v3 0/2] virtio-fs: add virtio file system device


On Wed, Feb 20, 2019 at 12:46:11PM +0000, Stefan Hajnoczi wrote:
> v3:
>  * Remove notifications virtqueue, it's unimplemented and can be added when
>    needed [Miklos]
>  * Add Security Considerations and Live Migration Considerations sections
>    [Michael]
> v2:
>  * Clean up core virtio file system device spec
>  * Add DAX window
> 
> These patches add the virtio file system device, which is based on Linux FUSE
> but includes the DAX window extension.  Similar to virtio-scsi, which
> transports SCSI commands, virtio-fs transports FUSE requests and the protocol
> documentation is not duplicated here.

I think I prefer virtio-fuse as a name. Let's be a bit more
specific: we might want to add more filesystem devices later on.


> The DAX window allows file contents to be accessed directly from shared memory.
> This eliminates copying of data, reduces the number of vmexits, and reduces the
> guest's memory footprint.  It also allows coherent mmap MAP_SHARED semantics
> between guests on the same host.
> 
> Stefan Hajnoczi (2):
>   content: add virtio file system device
>   virtio-fs: add DAX window
> 
>  content.tex      |   3 +
>  introduction.tex |   3 +
>  virtio-fs.tex    | 221 +++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 227 insertions(+)
>  create mode 100644 virtio-fs.tex
> 
> -- 
> 2.20.1
> 
> 
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