* Problems with console io from a PV guest
@ 2013-10-30 21:17 Simon Martin
2013-10-30 21:26 ` Andrew Cooper
0 siblings, 1 reply; 3+ messages in thread
From: Simon Martin @ 2013-10-30 21:17 UTC (permalink / raw)
To: xen-devel@lists.xen.org
[-- Attachment #1.1: Type: text/plain, Size: 1150 bytes --]
Hi All,
I am using the latest and greatest 4.4 unstable and I'm having problems
with console IO. I've been playing around with it for the last couple of
days and I can't seem to find what's wrong. I start the guest with the
"xl create -c" command and I only get one line of output. Input works
fine.
My code is based on the mini-os implementation. My sequence of events is
as follows from startup is as follows:
1.- Map in the shared_info page
2.- Initialise the console event
3.- Write a line to the console. Send the console channel event. This
seems to work as I see the output in the console and the console cons
and prod indices are equal on the next write call.
4.- After writing I get an event on the console channel with no
characters.
5.- Any writes after this are not shown on the console.
Any idea what I'm doing wrong?
Regards.
--
_ _ Debian GNU User Simon Martin
| | (_)_ __ _ ___ __ Project Manager
| | | | '_ \| | | \ \/ / Milliways
| |___| | | | | |_| |> < mailto: smartin@milliways.cl
|_____|_|_| |_|\__,_/_/\_\
Si Hoc Legere Scis Nimium Eruditionis Habes
[-- Attachment #1.2: Type: text/html, Size: 2568 bytes --]
[-- Attachment #2: Type: text/plain, Size: 126 bytes --]
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Problems with console io from a PV guest
2013-10-30 21:17 Problems with console io from a PV guest Simon Martin
@ 2013-10-30 21:26 ` Andrew Cooper
2013-10-31 11:32 ` Simon Martin
0 siblings, 1 reply; 3+ messages in thread
From: Andrew Cooper @ 2013-10-30 21:26 UTC (permalink / raw)
To: Simon Martin; +Cc: xen-devel@lists.xen.org
[-- Attachment #1.1: Type: text/plain, Size: 1488 bytes --]
On 30/10/13 21:17, Simon Martin wrote:
> Hi All,
>
> I am using the latest and greatest 4.4 unstable and I'm having
> problems with console IO. I've been playing around with it for the
> last couple of days and I can't seem to find what's wrong. I start the
> guest with the "xl create -c" command and I only get one line of
> output. Input works fine.
>
> My code is based on the mini-os implementation. My sequence of events
> is as follows from startup is as follows:
>
> 1.- Map in the shared_info page
>
> 2.- Initialise the console event
>
> 3.- Write a line to the console. Send the console channel event. This
> seems to work as I see the output in the console and the console cons
> and prod indices are equal on the next write call.
>
> 4.- After writing I get an event on the console channel with no
> characters.
Do you mean that you get an event on the event channel but there is no
movement on the prod/cons indicies?
~Andrew
>
> 5.- Any writes after this are not shown on the console.
>
> Any idea what I'm doing wrong?
>
> Regards.
>
>
> --
> _ _ Debian GNU User Simon Martin
> | | (_)_ __ _ ___ __ Project Manager
> | | | | '_ \| | | \ \/ / Milliways
> | |___| | | | | |_| |> < mailto: smartin@milliways.cl
> |_____|_|_| |_|\__,_/_/\_\
> Si Hoc Legere Scis Nimium Eruditionis Habes
>
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel
[-- Attachment #1.2: Type: text/html, Size: 4201 bytes --]
[-- Attachment #2: Type: text/plain, Size: 126 bytes --]
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2013-10-31 11:32 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2013-10-30 21:17 Problems with console io from a PV guest Simon Martin
2013-10-30 21:26 ` Andrew Cooper
2013-10-31 11:32 ` Simon Martin
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).