[lkml]   [2008]   [Jan]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [patch 02/11] PAT x86: Map only usable memory in x86_64 identity map and kernel text

On Thu, 10 Jan 2008, wrote:
> x86_64: Map only usable memory in identity map. All reserved memory maps to a
> zero page.

I don't mind this horribly per se, but why a zero page?

Accessing that page without mapping it explicitly would be a bug with
your change - if only because you'd get the wrong value!

So why map it at all? The only thing mapping it can do is to hide bugs.


 \ /
  Last update: 2008-01-10 22:13    [W:0.094 / U:1.736 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site