Re: [Xen-devel] [PATCH, RFC] linux Potential clean up of console transition

[Bill Burns <bburns@xxxxxxxxxx>]

Keir Fraser wrote:
> On 04/12/2008 22:22, "Bill Burns" <bburns@xxxxxxxxxx> wrote:
> 
>> Below is a crude little loop that could be used to
>> avoid the issue by outputting newlines to push
>> the beginning of dom0's output to the bottom of
>> the screen. Other suggestions are welcome. Note
>> is uses KERN_ERR since "quiet" blocks output
>> at the default printk level.
> 
> I think it's better for Xen to clear the screen when it relinquishes the
> console. I've checked in a patch to do that. It still leaves the screen
> uncleared if the 'keep vga' option is specified to Xen (that's the mode
> where Xen tries to share with dom0, for debugging purposes). In that mode it
> seems unwise to clear screen data when we don't have to.
> 
> Jan talked about orig_x and orig_y but we don't actually pass such data to
> dom0 for vesa consoles, so there's no trivial solution there. I think what
> we have now is fine, since debuggability is still available by specifying
> that Xen share the vga console with dom0.
> 

Hmm, looked at the patch and you did the work in vesa_endboot,
which really only exists in x86_64. So this only solves the issue
for that platform. I had been fiddling in vga_endboot to work around
that when I was looking at a HV fix.

 Bill

>  -- Keir
> 
> 
> 
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