On multi-socket Nehalem systems, where DIMMs are installed on only one CPU, the system panics during boot with the following kernel panic error message:
Too many lgrps for platform (4)
Workaround: Disable the use of the ACPI System Resource Affinity Table (SRAT) by performing one of the following two options:
Boot into kmdb(1) by adding '-k' to the GRUB menu kernel line, booting, and typing the following commands to kmdb(1):
lgrp_plat_srat_enable/W 0 :c
When the system is booted, set the <lgrp_srat_enable> boot property to 0 using eeprom(1M). This setting disables the use of SRAT across reboots.