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From: Jun Kuriyama <kuriyama@FreeBSD.org>
Date: Mon, 9 Nov 2009 02:54:16 +0000 (UTC)
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Subject: cvs commit: src/sys/amd64/amd64 initcpu.c src/sys/i386/i386
 initcpu.c
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kuriyama    2009-11-09 02:54:16 UTC

  FreeBSD src repository

  Modified files:
    sys/amd64/amd64      initcpu.c 
    sys/i386/i386        initcpu.c 
  Log:
  SVN rev 199067 on 2009-11-09 02:54:16Z by kuriyama
  
  - Add hw.clflush_disable loader tunable to avoid panic (trap 9) at
    map_invalidate_cache_range() even if CPU is not Intel.
  - This tunable can be set to -1 (default), 0 and 1.  -1 is same as
    current behavior, which automatically disable CLFLUSH on Intel CPUs
    without CPUID_SS (should be occured on Xen only).  You can specify 1
    when this panic happened on non-Intel CPUs (such as AMD's).  Because
    disabling CLFLUSH may reduce performance, you can try with setting 0
    on Intel CPUs without SS to use CLFLUSH feature.
  
  Reviewed by:    kib
  Reported by:    karl, kuriyama
  Related to:     kern/138863
  
  Revision  Changes    Path
  1.57      +18 -1     src/sys/amd64/amd64/initcpu.c
  1.64      +18 -1     src/sys/i386/i386/initcpu.c