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 |
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* 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
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