lkml.org 
[lkml]   [2008]   [Mar]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] [4/7] Don't use large pages to map the first 2/4MB of memory
On Fri, 21 Mar 2008, Andi Kleen wrote:
> > Also we split the first GB mapping anyway due to the various regions
> > (NX, RO, UC) in there.
>
> I didn't think so unless you have DEBUG_RODATA enabled?

NX is independent of DEBUG_RODATA and the RODATA protection should be
made unconditional on anyway.

> Also there
> should be no UC region there as known by the kernel. There might
> be a WC region there from the frame buffer code, but that is an MTRR,
> not a pageattr.

The first ioremap of the PCI space splits the GB page as well.

Thanks,

tglx


\
 
 \ /
  Last update: 2008-03-21 19:05    [W:1.584 / U:0.088 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site