Messages in this thread | | | Date | Mon, 19 May 2003 12:37:17 +0200 | From | Andi Kleen <> | Subject | Re: [PATCH] Use MTRRs by default for vesafb on x86-64 |
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On Sat, May 17, 2003 at 12:58:39AM +0200, Eric W. Biederman wrote: > I don't know if this affects the frame buffers per se. > > But often BIOS's on systems with large amounts of memory configure > overlapping mtrrs (where an uncacheable mtrr would override a larger > cacheable range). To date this has confused the linux mtrr code when > it tries to modify things, and you cannot properly setup mtrrs. I > believe this applies to both the fb case as well as X.
Interesting. Perhaps it would be really better to use change_page_attr() with PAT for this. It would avoid these problems.
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