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Re: [Xen-devel] [PATCH 3/4] docs/sphinx: Introduction


  • To: Lars Kurth <lars.kurth@xxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Date: Fri, 18 Oct 2019 19:19:56 -0700
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On 08/10/2019 13:34, Lars Kurth wrote:
>
> On 03/10/2019, 21:59, "Andrew Cooper" <andrew.cooper3@xxxxxxxxxx> wrote:
>
>     Put together an introduction page for the Sphinx/RST docs, along with a
>     glossary which will accumulate over time.
>     
>     Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
>
> Reviewed-by: Lars Kurth <lars.kurth@xxxxxxxxxx>

Thanks.

>
> There were a few minor improvements which could be made, I am listing these
> below, but none are show-stoppers.
>
>     +Xen is an open source, bare metal hypervisor.  It runs as the most 
> privileged
>     +piece of software, and shares the resources of the hardware between 
> virtual
> Maybe better: s/software/software on the system/ or s/software/software on 
> the host/

Fixed.

>     +machines.
>
>     +   hardware domain
>     +     A :term:`domain`, commonly dom0, which shares responsibility with 
> Xen
>     +     about the system as a whole.
>     +
>     +     By default it gets all devices, including all disks and network 
> cards, so
>     +     is responsible for multiplexing guest I/O
>
> This is a little unclear: in particular the 1st paragraph. Earlier you talk 
> about hardware
> domain="responsible for hardware and marshalling guest I/O", which is 
> clearer. 
>
> Maybe: 
>
> A :term:`domain`, commonly dom0, which hosts all devices, including disks
> and network cards and is responsible for multiplexing guest I/O
>
> is better

Sadly, its not accurate.

Multiplexing of I/O is only in the case that device driver domains
aren't in use.  The other example you cite is a description of the
associated image.

There are things besides I/O which the hardware domain is responsible
for, such as APCI OPSM (but only in x86), and system reboot etc.

I have left the description as-is, for lack of an obviously better way
of expressing things.

~Andrew

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