Messages in this thread | | | Date | Tue, 06 Apr 2010 23:04:54 -0700 | From | "H. Peter Anvin" <> | Subject | Re: why choose 896MB to the start point of ZONE_HIGHMEM |
| |
On 04/06/2010 10:57 PM, Venkatram Tummala wrote: > Just a note Chetan. > > We can't exactly say that we require "page table settings" to map that > 896 MB of physical ram. It is an identity mapped segment (1-1 mapping). > So, we dont require the "page tables". Virtual address will be equal to > Physical Address + Page Offset. It is just an addition of offset >
No, we still need page tables for the identity-mapped segment.
-hpa
-- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.
| |