Re: Linux 2.5.71 - random console corruption

James Simmons (jsimmons@infradead.org)
Tue, 17 Jun 2003 00:34:49 +0100 (BST)

> On Mon, 2003-06-16 at 14:27, James Simmons wrote:
>
> > Preempt and the VT console system are not friends. There are way to many
> > global variables which have there states altered in many spots.
>
> So why is this not an SMP race, too?

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.

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