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

On Tue, 9 Mar 2021 14:20:14 -0700
Enrico Granata <egranata@google.com> 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(-)
> diff --git a/content.tex b/content.tex
> index b72bad0..75631ba 100644
> --- a/content.tex
> +++ b/content.tex
> @@ -4418,6 +4418,9 @@ \subsection{Feature bits}\label{sec:Device Types
> / Block Device / Feature bits}

There still seems to be something wrong with the line wrapping in this
patch (won't apply without manual massaging) -- can you please
double-check your setup?

That said, I think we can still vote on this patch; please add the link
to this version to the github issue if you think it's time for voting.

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