git: kernel64 - Greatly reduce memory probe times, remove basemem calculation

[Matthew Dillon]

commit b4d9abe2a11fcb0cf4c8ff6296254d1bee824f2e
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Tue Feb 1 14:23:29 2011 -0800

    kernel64 - Greatly reduce memory probe times, remove basemem calculation
    
    * Greatly reduce memory probe times by testing in multiples of 128K instead
      of multiples of 4K.  Also add cpu_mfence() instructions to flush the
      cpu store buffer.
    
      This greatly reduces the startup time for x86-64 on monster machines
      with lots of memory (tested w/64G).
    
    * Remove the basemem calculation, it is no longer used.

Summary of changes:
 sys/platform/pc64/include/md_var.h |    1 -
 sys/platform/pc64/x86_64/machdep.c |  117 ++++++++++++++++++++++-------------
 2 files changed, 73 insertions(+), 45 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/b4d9abe2a11fcb0cf4c8ff6296254d1bee824f2e


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