Messages in this thread |  | | | Date | Mon, 28 Apr 2008 15:08:26 +0200 | | From | Ingo Molnar <> | | Subject | Re: [PATCH] x86: mtrr cleanup for converting continuous to discrete layout v2 |
* Yinghai Lu <yhlu.kernel.send@gmail.com> wrote:
> some BIOS like to use continus MTRR layout, and X driver can not add
> WB entries for graphical cards when 4g or more RAM installed.
>
> the patch will change MTRR to discrete.
>
> mtrr_chunk_size= could be used to have smaller continuous block to
> hold holes. default is 256m, could be set according to size of
> graphics card memory.
hm.
> +static int disable_mtrr_cleanup;
i think this should be default-disabled. Touching MTRRs on a live system
could interact with SMM and MCE handlers.
how relevant is this feature with modern Xorg? I thought modern Xorg
would get its mappings via /sys, hence it would not have to touch MTRRs
at all.
Ingo
|  |