Re: [tip:x86/boot] x86/boot/compressed/64: Prepare trampoline memory

[Kirill A. Shutemov]

On Mon, Feb 26, 2018 at 11:15:34AM +0300, Cyrill Gorcunov wrote:
> On Mon, Feb 26, 2018 at 11:02:56AM +0300, Kirill A. Shutemov wrote:
> ...
> > > Also, could do a puts() hexdump of the affected memory area _before_ we overwrite 
> > > it? Is it empty? Could we add some debug warning that checks that it's all zeroes?
> > 
> > The problem is that we don't really have a way get a message out of there.
> > 
> > http://lkml.kernel.org/r/793b9c55-e85b-97b5-c857-dd8edcda4081@xxxxxxxxx
> > 
> 
> I'm sorry for stepping in (since I didn't follow the series in details)
> but can't we use vga memory here and print this early data tere?

I have no idea how to do this :/

And what about systems without monitor at all?

-- 
 Kirill A. Shutemov