Re: Is it possible to implement interrupt time printk's reliably?

[Jon Smirl]

So how long is the delay between PCI probe time (when the framebuffer goes
active) and when early user space is up with initrd? Or is initrd up first? If
initrd is up first then early user space mode setting will occur at the same
time that it does currently.

--- James Simmons <jsimmons@xxxxxxxxxxxxx> wrote:
> 
> > So how do printk's work in the very early boot? Is the video card active
> before
> > the kernel probes it's module, or are these very early printk's being queued
> > until the video driver is probed?
> 
> printk messages are stored in log_buf in printk.c. The console driver just 
> reads the buffer and displays what is in the buffer. Look at printk.c 
> carefully.
> 
>  
> 


=====
Jon Smirl
jonsmirl@xxxxxxxxx


	
		
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