Re: Intel's response Linux/MTRR/8GB Memory Support / Why doesn't the kernel realize the BIOS has problems and re-map appropriately?

On Tue, 5 Jun 2007, Andi Kleen wrote:

So the only safe thing we can do is not use memory that is not
write-back cached.  That we can positively detect and is a
conservative action so if anything will work that will.

Jesse wrote such a patch (or rather it limitted end_pfn), but it broke
the X server for so far unknown reasons.

-Andi

So the best solution is for a patch/function that calculates the E820 memory map subtracts the non-cached memory and does the equivilant of append= in LILO config with the proper amount of memory?

Justin.
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• References:
  • Intel's response Linux/MTRR/8GB Memory Support / Why doesn't the kernel realize the BIOS has problems and re-map appropriately?
    • From: Justin Piszcz <[email protected]>
  • Re: Intel's response Linux/MTRR/8GB Memory Support / Why doesn't the kernel realize the BIOS has problems and re-map appropriately?
    • From: Jesse Barnes <[email protected]>
  • Re: Intel's response Linux/MTRR/8GB Memory Support / Why doesn't the kernel realize the BIOS has problems and re-map appropriately?
    • From: Andi Kleen <[email protected]>
  • Re: Intel's response Linux/MTRR/8GB Memory Support / Why doesn't the kernel realize the BIOS has problems and re-map appropriately?
    • From: Jesse Barnes <[email protected]>
  • Re: Intel's response Linux/MTRR/8GB Memory Support / Why doesn't the kernel realize the BIOS has problems and re-map appropriately?
    • From: [email protected] (Eric W. Biederman)
  • Re: Intel's response Linux/MTRR/8GB Memory Support / Why doesn't the kernel realize the BIOS has problems and re-map appropriately?
    • From: Justin Piszcz <[email protected]>
  • Re: Intel's response Linux/MTRR/8GB Memory Support / Why doesn't the kernel realize the BIOS has problems and re-map appropriately?
    • From: Alan Cox <[email protected]>
  • Re: Intel's response Linux/MTRR/8GB Memory Support / Why doesn't the kernel realize the BIOS has problems and re-map appropriately?
    • From: [email protected] (Eric W. Biederman)
  • Re: Intel's response Linux/MTRR/8GB Memory Support / Why doesn't the kernel realize the BIOS has problems and re-map appropriately?
    • From: "Yinghai Lu" <[email protected]>
  • Re: Intel's response Linux/MTRR/8GB Memory Support / Why doesn't the kernel realize the BIOS has problems and re-map appropriately?
    • From: [email protected] (Eric W. Biederman)
  • Re: Intel's response Linux/MTRR/8GB Memory Support / Why doesn't the kernel realize the BIOS has problems and re-map appropriately?
    • From: Andi Kleen <[email protected]>

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