* netconsole as normal console for userspace messages?
@ 2009-08-30 0:12 Arkadiusz Miskiewicz
2009-09-01 10:16 ` Jarek Poplawski
0 siblings, 1 reply; 5+ messages in thread
From: Arkadiusz Miskiewicz @ 2009-08-30 0:12 UTC (permalink / raw)
To: netdev
Hi,
Can netconsole be somehow used to see userspace messages, too? Something
similar to console=ttySX... just =netconsole.
--
Arkadiusz Miśkiewicz PLD/Linux Team
arekm / maven.pl http://ftp.pld-linux.org/
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: netconsole as normal console for userspace messages?
2009-08-30 0:12 netconsole as normal console for userspace messages? Arkadiusz Miskiewicz
@ 2009-09-01 10:16 ` Jarek Poplawski
2009-09-01 15:15 ` Matt Mackall
0 siblings, 1 reply; 5+ messages in thread
From: Jarek Poplawski @ 2009-09-01 10:16 UTC (permalink / raw)
To: Arkadiusz Miskiewicz; +Cc: netdev, Matt Mackall
On 30-08-2009 02:12, Arkadiusz Miskiewicz wrote:
> Hi,
Hi,
>
> Can netconsole be somehow used to see userspace messages, too? Something
> similar to console=ttySX... just =netconsole.
>
AFAIK it can't, but AFAICR some time ago the netconsole maintainer
gave some hope to some Debian guy with a similar question.
Jarek P.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: netconsole as normal console for userspace messages?
2009-09-01 10:16 ` Jarek Poplawski
@ 2009-09-01 15:15 ` Matt Mackall
2009-09-01 16:00 ` Arkadiusz Miskiewicz
0 siblings, 1 reply; 5+ messages in thread
From: Matt Mackall @ 2009-09-01 15:15 UTC (permalink / raw)
To: Jarek Poplawski; +Cc: Arkadiusz Miskiewicz, netdev
On Tue, 2009-09-01 at 10:16 +0000, Jarek Poplawski wrote:
> On 30-08-2009 02:12, Arkadiusz Miskiewicz wrote:
> > Hi,
> Hi,
>
> >
> > Can netconsole be somehow used to see userspace messages, too? Something
> > similar to console=ttySX... just =netconsole.
> >
>
> AFAIK it can't, but AFAICR some time ago the netconsole maintainer
> gave some hope to some Debian guy with a similar question.
It is, as they say, just a simple matter of programming to get a full
bidirectional console out of it. As cool as that would be, I just
haven't had time for it.
--
http://selenic.com : development and support for Mercurial and Linux
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: netconsole as normal console for userspace messages?
2009-09-01 15:15 ` Matt Mackall
@ 2009-09-01 16:00 ` Arkadiusz Miskiewicz
2009-09-01 17:34 ` Matt Mackall
0 siblings, 1 reply; 5+ messages in thread
From: Arkadiusz Miskiewicz @ 2009-09-01 16:00 UTC (permalink / raw)
To: Matt Mackall; +Cc: Jarek Poplawski, netdev
On Tuesday 01 of September 2009, Matt Mackall wrote:
> On Tue, 2009-09-01 at 10:16 +0000, Jarek Poplawski wrote:
> > On 30-08-2009 02:12, Arkadiusz Miskiewicz wrote:
> > > Hi,
> >
> > Hi,
> >
> > > Can netconsole be somehow used to see userspace messages, too?
> > > Something similar to console=ttySX... just =netconsole.
> >
> > AFAIK it can't, but AFAICR some time ago the netconsole maintainer
> > gave some hope to some Debian guy with a similar question.
>
> It is, as they say, just a simple matter of programming to get a full
> bidirectional console out of it. As cool as that would be, I just
> haven't had time for it.
Unidirectional console would be enough for me but it seems that netconsole
isn't capable even for that (userspace messages).
--
Arkadiusz Miśkiewicz PLD/Linux Team
arekm / maven.pl http://ftp.pld-linux.org/
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: netconsole as normal console for userspace messages?
2009-09-01 16:00 ` Arkadiusz Miskiewicz
@ 2009-09-01 17:34 ` Matt Mackall
0 siblings, 0 replies; 5+ messages in thread
From: Matt Mackall @ 2009-09-01 17:34 UTC (permalink / raw)
To: Arkadiusz Miskiewicz; +Cc: Jarek Poplawski, netdev
On Tue, 2009-09-01 at 18:00 +0200, Arkadiusz Miskiewicz wrote:
> On Tuesday 01 of September 2009, Matt Mackall wrote:
> > On Tue, 2009-09-01 at 10:16 +0000, Jarek Poplawski wrote:
> > > On 30-08-2009 02:12, Arkadiusz Miskiewicz wrote:
> > > > Hi,
> > >
> > > Hi,
> > >
> > > > Can netconsole be somehow used to see userspace messages, too?
> > > > Something similar to console=ttySX... just =netconsole.
> > >
> > > AFAIK it can't, but AFAICR some time ago the netconsole maintainer
> > > gave some hope to some Debian guy with a similar question.
> >
> > It is, as they say, just a simple matter of programming to get a full
> > bidirectional console out of it. As cool as that would be, I just
> > haven't had time for it.
>
> Unidirectional console would be enough for me but it seems that netconsole
> isn't capable even for that (userspace messages).
Yes. What's needed is to add a low-level tty interface and register it
with the tty core. Most of that is attaching the tty_ops->write() method
to netpoll's send_msg in the obvious way. Just about all the other
methods are optional or trivial.
Once you've got unidirectional working, bidirectional is approximately
one line of additional code to attach the read side: call
tty_insert_flip_string(my_tty, buf, len) in netpoll's receive function.
--
http://selenic.com : development and support for Mercurial and Linux
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2009-09-01 17:35 UTC | newest]
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2009-08-30 0:12 netconsole as normal console for userspace messages? Arkadiusz Miskiewicz
2009-09-01 10:16 ` Jarek Poplawski
2009-09-01 15:15 ` Matt Mackall
2009-09-01 16:00 ` Arkadiusz Miskiewicz
2009-09-01 17:34 ` Matt Mackall
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