Re: [uml-devel] [patch 094/241] uml: fix error output during early boot

[Blaisorblade <blaisorblade@yahoo.it>]

On Saturday 10 February 2007 23:21, Jeff Dike wrote:
> On Sat, Feb 10, 2007 at 01:31:20PM +0100, Blaisorblade wrote:
> > libc's printf has an enormous stack usage, so that my_printf is used for
> > direct output instead of printf; if this is ok because it's bootup
> > code,
>
> It is bootup code only.
>
> > then *fatal* should be marked as "bootup code only";
>
> OK.
>
> > otherwise
> > we may reuse vsprintf() and write() or fputs(); this should match
> > what happens in my_printf, to avoid any unlikely problem with libc's
> > buffering.
>
> Offhand, I would say that if we are on a kernel stack, printk is safe
> to use, and should be used, so there's no need for things like
> my_printf.  Maybe there are some exceptions in early boot when the
> kernel is running, but before the console is working, but I can't
> think of any problems we've had like that.

It's for no_config_chan (don't recall the right name), i.e. for when the 
console will never work because of a misconfiguration. Indeed it's static 
(and otherwise it ought to have a better name!).

-- 
Inform me of my mistakes, so I can add them to my list!
Paolo Giarrusso, aka Blaisorblade
http://www.user-mode-linux.org/~blaisorblade
Chiacchiera con i tuoi amici in tempo reale! 
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