> take 500msec. If printk() wants guarantees about being able to print
> any time, whole fbcon has to be cli-ed even for normal
> operation. Ouch.
>
> Or we could give something up. Like giving up printk altogether [not
> good] or declaring that printk is emergency-only and may mess up
> screen.
We actually sort of do the latter for text console - it is less likely
to occur but can happen. Do a printk() in a tight loop and you'll see the
console sometimes jump maybe 40 characters to the right then jump back
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