Re: [Xen-devel] [PATCH v3 3/4] docs: add pvscsi.txt

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Fri, Mar 06, 2015 at 10:45:55AM +0100, Olaf Hering wrote:
> Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
> Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
> Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
> Cc: Jan Beulich <jbeulich@xxxxxxxx>
> Cc: Keir Fraser <keir@xxxxxxx>
> Cc: Tim Deegan <tim@xxxxxxx>
> ---
>  docs/misc/pvscsi.txt | 188 
> +++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 188 insertions(+)
> 
> diff --git a/docs/misc/pvscsi.txt b/docs/misc/pvscsi.txt
> new file mode 100644
> index 0000000..988a12b
> --- /dev/null
> +++ b/docs/misc/pvscsi.txt
> @@ -0,0 +1,188 @@
> +. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
> . .
> +PVSCSI
> +
> +== Overview ==
> +
> +PVSCSI allows to assing a "physical" SCSI device from dom0 to a domU. The 
> device
> +is not limited to be a native SCSI device. Everything visible as SCSI device 
> in
> +dom0 can be used. Currently PVSCSI is only available in Linux dom0 and domU.
> +
> +== TODO ===
> +
> +How to do live migration?
> + - pdev will likely be evaluated again on the target host if it came from
> +   domU.cfg. But what about pdev from 'xl scsi-attach pdev vdev'? Its 
> required
> +   to adjust h:c:t:l on the target host.
> +
> +How to handle FIXME in libxl_retrieve_domain_configuration?
> + - "MERGE(vscsi, vscsis, COMPARE_DEVID, {});", when does this code run?
> + 

I don't think this kind of information that relates to libxl internal
belongs here.

Anyway, to answer you question. libxl_retrieve_domain_configuration is
called by xl when you do migration / detailed domain configuration
listing etc.

I think the comment above MERGE macro states what it does and how to use
it. Is there anything that's not clear to you?

Wei.

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