Hi,
SXCE build 76 includes generic machine check architecture (MCA) support
for all x86 class cpus that advertise MCA and MCE in CPUID info. On old,
odd or virtualized hardware there is the possibility of shaking out
some misbehaviour and also of suffering a couple of dumb bugs:
1) Build 76 will not boot (to install, or after live upgrade) on
pre-Pentium-4 Intel processors (P6, PII, Mobile PII, PII Xeon,
PIII, Mobile PIII, PIII Xeon). This is due to 6617465. The CR
includes a workaround that will let you boot an affected system,
but the workaround must be reapplied at each boot.
If your systems 'psrinfo -vp' output shows an Intel cpu with
family 6 and model any one of 1, 3, 5, 6, 7, 8, 10 or 11
(see IS_LEGACY_P6 in cpuid.c) then it will not boot build 76.
2) CR 6620982 applies when hardware or hypervisor indicates MCA/MCE
support in CPUID, but then presents zero MCA banks on a cpu.
This will lead to a NULL pointer dereference in gcpu_mca_logout
call from gcpu_ntv_mca_poll.
CR 6620982 is known to apply on at least some VMware versions,
and to Via C7 hardware. It does not apply to Solaris xVM.
The CR includes a workaround that can be applied in /etc/system
(set cmi_no_init=1).
These problems are fixed in build 77.
Cheers
Gavin
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