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    SubjectRe: [PATCH] x86: mtrr cleanup for converting continuous to discrete - auto detect
    On Thu, May 1, 2008 at 5:09 AM, Mika Fischer <> wrote:
    > Yinghai Lu schrieb:
    > > loop mtrr chunk_size and gran_size from 1M to 2G to find out optimal value.
    > >
    > > so user don't need to add mtrr_chunk_size and mtrr_gran_size,
    > >
    > > if optimal value is not found, print out all list to help select less optimal
    > > value.
    > >
    > > add mtrr_spare_reg_nr= so user could set 2 instead of 1, if the card need more entries.
    > On my system x86-latest + this patch and using no boot options gives me
    > this /proc/mtrr:
    > reg00: base=0x00000000 ( 0MB), size=2048MB: write-back, count=1
    > reg01: base=0x80000000 (2048MB), size= 512MB: write-back, count=1
    > reg02: base=0xa0000000 (2560MB), size= 256MB: write-back, count=1
    > reg03: base=0xb0000000 (2816MB), size= 256MB: write-back, count=1
    > reg04: base=0xbf700000 (3063MB), size= 1MB: uncachable, count=1
    > reg05: base=0xbf800000 (3064MB), size= 8MB: uncachable, count=1
    > reg06: base=0x100000000 (4096MB), size=1024MB: write-back, count=1
    > Which is OK. It could probably collapse reg01-reg03 into one but that's
    > a minor issue (for me at least, there are probably cases where
    > collapsing them might save the user from having to specify the
    > mtrr_spare_reg_nr boot option).

    yes. please try mtrr_spare_reg_nr=3 or etc.


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