Messages in this thread | | | Date | Tue, 15 Jul 2014 17:05:29 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [RFC PATCH 3/11] x86, mm, pat: Change reserve_memtype() to handle WT type |
| |
On 07/15/2014 04:53 PM, Toshi Kani wrote: > > Right. > > I think using struct page table for the RAM ranges is a good way for > saving memory, but I wonder how often the RAM ranges are mapped other > than WB... If not often, reserve_memtype() could simply call > rbt_memtype_check_insert() for all ranges, including RAM. > > In this patch, I left using reserve_ram_pages_type() since I do not see > much reason to use WT for RAM, either. >
They get flipped to WC or WT or even UC for some I/O devices, but ultimately the number of ranges is pretty small.
-hpa
| |