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From: Alan Cox <alc@FreeBSD.org>
Date: Sat, 27 Feb 2010 18:00:57 +0000 (UTC)
To: cvs-src-old@freebsd.org
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Subject: cvs commit: src/sys/amd64/amd64 pmap.c src/sys/i386/i386 pmap.c
 src/sys/kern subr_param.c src/sys/sys systm.h
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alc         2010-02-27 18:00:57 UTC

  FreeBSD src repository

  Modified files:
    sys/amd64/amd64      pmap.c 
    sys/i386/i386        pmap.c 
    sys/kern             subr_param.c 
    sys/sys              systm.h 
  Log:
  SVN rev 204420 on 2010-02-27 18:00:57Z by alc
  
  When running as a guest operating system, the FreeBSD kernel must assume
  that the virtual machine monitor has enabled machine check exceptions.
  Unfortunately, on AMD Family 10h processors the machine check hardware
  has a bug (Erratum 383) that can result in a false machine check exception
  when a superpage promotion occurs.  Thus, I am disabling superpage
  promotion when the FreeBSD kernel is running as a guest operating system
  on an AMD Family 10h processor.
  
  Reviewed by:    jhb, kib
  MFC after:      3 days
  
  Revision  Changes    Path
  1.682     +9 -0      src/sys/amd64/amd64/pmap.c
  1.663     +9 -0      src/sys/i386/i386/pmap.c
  1.93      +4 -4      src/sys/kern/subr_param.c
  1.283     +3 -0      src/sys/sys/systm.h