K 10
svn:author
V 8
kuriyama
K 8
svn:date
V 27
2009-11-09T02:54:16.167813Z
K 7
svn:log
V 595
- 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

END