Messages in this thread | | | Date | Fri, 21 Mar 2008 19:03:19 +0100 (CET) | From | Thomas Gleixner <> | Subject | Re: [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
| |