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MFi386: revision 1.1170

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Yoshihiro Takahashi 2004-11-10 12:24:30 +00:00
parent 81755e6eb6
commit 2fc297fbd7
1 changed files with 5 additions and 3 deletions
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8
sys/pc98/conf/NOTES
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@ -88,9 +88,11 @@ cpu I686_CPU # aka Pentium Pro(tm)
# I/O device(s).
#
# CPU_DISABLE_CMPXCHG disables the CMPXCHG instruction on > i386 IA32
# machines. VmWare seems to emulate this instruction poorly, causing
# the guest OS to run very slowly. Enabling this with an SMP kernel
# will cause the kernel to be unusable.
# machines. VmWare 3.x seems to emulate this instruction poorly, causing
# the guest OS to run very slowly. This problem appears to be fixed in
# VmWare 4.x, at least in version 4.5.2, so that enabling this option with
# VmWare 4.x will result in locking operations to be 20-30 times slower.
# Enabling this with an SMP kernel will cause the kernel to be unusable.
#
# CPU_DISABLE_SSE explicitly prevents I686_CPU from turning on SSE.
#