Re: Linux 2.5.71 - random console corruption

[Grzegorz Jaskiewicz <gj@pointblue.com.pl>]

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On Wednesday 18 of June 2003 02:50, Gerhard Mack wrote:
> On Tue, 17 Jun 2003, James Simmons wrote:
> > > > For userland<->kernel transactions we have the console_semaphore to
> > > > protect us. It is also used for console_callback. The
> > > > console_semaphore is not used internally to protect global variables
> > > > :-( To do this properly would take quite a bit of work.
> > >
> > > It looks like all these globals need a lock -- they can race on SMP or
> > > with kernel preemption.
> > >
> > > Is it really going to be that hard to wrap a lock around their access,
> > > because I think this is going to bite SMP users.
> >
> > For things like fg_console and currcon it will be. Those variables are
> > used everyway like mad. That is a whole lot of locks. I doubt this issue
> > will be solved until 2.7.X.
>
> Interestingly enough it's not console switching that does it.. it's
> scrolling also as I mentioned before it's not just with preempt enabled.
>
> I wonder if theres another problem somewhere?
I've got simmilar problem with 2.5.72, sometimes keyboard stops to respond (in 
X windows). Mouse is usefull, all i have to do is restart Xwindows and 
everything is running well.

- --
Grzegorz Jaskiewicz
K4 Labs
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