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Expand on the reasons for and against defining NO_F00F_HACK. This is one of

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those options that is frequently misunderstood, and ends up on -questions.

PR:		21852
This commit is contained in:
Doug Barton 2000-10-27 10:57:33 +00:00
parent 445516e4e0
commit c9e6ddc6af
2 changed files with 4 additions and 4 deletions
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4
sys/conf/NOTES
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@ -225,8 +225,8 @@ cpu I686_CPU # aka Pentium Pro(tm)
#
# NO_F00F_HACK disables the hack that prevents Pentiums (and ONLY
# Pentiums) from locking up when a LOCK CMPXCHG8B instruction is
# executed. This should be included for ALL kernels that won't run
# on a Pentium.
# executed. This option is only needed if I586_CPU is also defined,
# and should be included for any non-Pentium CPU that defines it.
#
# NO_MEMORY_HOLE is an optimisation for systems with AMD K6 processors
# which indicates that the 15-16MB range is *definitely* not being

4
sys/i386/conf/NOTES
View File

@ -225,8 +225,8 @@ cpu I686_CPU # aka Pentium Pro(tm)
#
# NO_F00F_HACK disables the hack that prevents Pentiums (and ONLY
# Pentiums) from locking up when a LOCK CMPXCHG8B instruction is
# executed. This should be included for ALL kernels that won't run
# on a Pentium.
# executed. This option is only needed if I586_CPU is also defined,
# and should be included for any non-Pentium CPU that defines it.
#
# NO_MEMORY_HOLE is an optimisation for systems with AMD K6 processors
# which indicates that the 15-16MB range is *definitely* not being