On Wed, Oct 04, 2006 at 12:52:52PM -0500, Anthony Liguori wrote:
> Daniel P. Berrange wrote:
> >On Wed, Oct 04, 2006 at 11:49:56AM -0500, Anthony Liguori wrote:
> >
> >>Considering that today in Xen we have a default buffer size, it seems
> >>considerably easier to me to just get rid of xenconsoled completely and
> >>expand the domU-kernel ring queue to be the actual size of what we're
> >>buffering today.
> >>
> >>This eliminates all of these problems and gets rid of a dom0 daemon.
> >>Plus, the domU gets taxed for the buffer memory instead of dom0.
> >>
> >>We would then change xenconsole to read the buffer directly.
> >>
> >
> >Its very useful to be able to expose the data as a Psuedo-TTY, as
> >it lets people use standard toolset for dealing the DomU log data.
> >eg virt-manager can just connect up a VTE terminal widget straight
> >to the TTY for a terminal UI. Or tools like ttywatch can log the
> >data to file, or network, etc. Or minicom for a standard text based
> >interactive client, etc Forcing everything to use the custom
> >xenconsole client program would be a step backward.
> >
>
> Xenconsole could still spit out on a PTY. You don't necessarily need a
> daemon though (you could launch a xenconsole for each domain that was
> started).
The xenconsole would still need the rate-limiting, and once you're launching
one xenconsole per domain, where's the gain over the single xenconsoled
process ?
> That also gives you a bit more choice in how you expose the console (you
> could have a xenconsole that spit out via TCP).
Given a TTY, there are already tools which can do this & more. So I don't see
any point in writing such functionality again for Xen. If using HVM domains
one would already typically be exposing a serial console from the guest via
a pseudo-TTY, so doing all PV console stuff via a TTY gives parity in the
management toolset.
Regards,
Dan.
--
|=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=|
|=- Perl modules: http://search.cpan.org/~danberr/ -=|
|=- Projects: http://freshmeat.net/~danielpb/ -=|
|=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
Home