Messages in this thread | | | Date | Mon, 28 Apr 2008 22:15:06 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH] x86: mtrr cleanup for converting continuous to discrete layout v3 |
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* Yinghai Lu <yhlu.kernel.send@gmail.com> wrote:
> some BIOS like to use continus MTRR layout, and some 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. > > v2: fix -1 for UC checking
> v3: default to disable, and need use enable_mtrr_cleanup to enable > this feature > skip the var state change warning. > remove next_basek in range_to_mtrr()
a boot option is often inconvenient though - could you perhaps also make this a Kconfig option, with it defaulting to off? Something like CONFIG_MTRR_SANITIZE=y or so? That way distros can make a conscious decision as well whether they want this feature (for the Xorg they pick) or not.
Ingo
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