diff options
| author | Yoshihiro Takahashi <nyan@FreeBSD.org> | 2004-11-10 12:24:30 +0000 |
|---|---|---|
| committer | Yoshihiro Takahashi <nyan@FreeBSD.org> | 2004-11-10 12:24:30 +0000 |
| commit | 2fc297fbd7feff59737035859f0d4e7bc81e86e1 (patch) | |
| tree | 9c72b61fe37d813d71028c4ddddd3423a444479b /sys/pc98 | |
| parent | 81755e6eb6bb3fa6f6fe59c45dcbc9bc4e1cc94b (diff) | |
Notes
Diffstat (limited to 'sys/pc98')
| -rw-r--r-- | sys/pc98/conf/NOTES | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/sys/pc98/conf/NOTES b/sys/pc98/conf/NOTES index 8bf59790f7c2..1345cc76645c 100644 --- a/sys/pc98/conf/NOTES +++ b/sys/pc98/conf/NOTES @@ -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. # |