cvs commit: src/sys/i386/i386 vm_machdep.c

[Alan Cox]

alc         2004-10-16 22:32:50 UTC

  FreeBSD src repository

  Modified files:
    sys/i386/i386        vm_machdep.c 
  Log:
  When sf_buf_alloc() replaces a virtual-to-physical mapping, it needn't
  invalidate the TLB(s) if the old mapping wasn't used by the CPU.  With
  network interfaces that implement checksum off-loading, the old mapping is
  almost never used by the CPU, only by the device driver for setting up the
  DMA operation.
  
  Reviewed by: tegge@
  
  Revision  Changes    Path
  1.242     +15 -1     src/sys/i386/i386/vm_machdep.c