Re: [virtio-dev] [PATCH v5] Add lifetime metrics to virtio-blk

[Stefan Hajnoczi <stefanha@redhat.com>]

On Tue, Mar 09, 2021 at 02:20:14PM -0700, Enrico Granata wrote:
> In many embedded systems, virtio-blk implementations are
> backed by eMMC or UFS storage devices, which are subject to
> predictable and measurable wear over time due to repeated write
> cycles.
> 
> For such systems, it can be important to be able to track
> accurately the amount of wear imposed on the storage over
> time and surface it to applications. In a native deployments
> this is generally handled by the physical block device driver
> but no such provision is made in virtio-blk to expose these
> metrics for devices where it makes sense to do so.
> 
> This patch adds support to virtio-blk for lifetime and wear
> metrics to be exposed to the guest when a deployment of
> virtio-blk is done over compatible eMMC or UFS storage.
> 
> Signed-off-by: Enrico Granata <egranata@google.com>
> Fixes: https://github.org/oasis-tcs/virtio-spec/issues/97
> ---
>  content.tex | 35 +++++++++++++++++++++++++++++++++--
>  1 file changed, 33 insertions(+), 2 deletions(-)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

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