question about MTRR and XFree86 4.0

[Peter Jay Salzman <p@dirac.org>]

according to /usr/src/linux/Documentation/mtrr.txt...

  A patch is being written for XFree86 which will make this automatic:
  in other words the X server will manipulate /proc/mtrr using the
  ioctl() interface, so users won't have to do anything.

does anybody know if this has been done yet?  it looks like my mtrr was set:

  reg00: base=0x00000000 (   0MB), size= 128MB: write-back, count=1
  reg01: base=0x08000000 ( 128MB), size=  64MB: write-back, count=1
  reg02: base=0x0c000000 ( 192MB), size=  32MB: write-back, count=1
  reg03: base=0xe8000000 (3712MB), size=  64MB: write-combining, count=2

but i haven't echo'd anything to /proc/mtrr.

has this patch already been integrated into X 4.0?

pete

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