Re: Linux 2.5.71 - random console corruption

[James Simmons]

> > 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.