Description of problem: When booting a RHEL 4.7.z Kernel on a SGI Altix machine, the following has been seen, No logical to physical processor mapping available ACPI: Local APIC address c0000000fee00000 ACPI: Error parsing MADT - no IOSAPIC entries register_intr: No IOSAPIC for GSI 52 acpi_register_gsi: error -19 4 CPUs available, 4 CPUs total Registering legacy COM ports for serial console ... SELinux: Initializing. SELinux: Starting in permissive mode selinux_register_security: Registering secondary module capability Capability LSM initialized as secondary Mount-cache hash table entries: 1024 (order: 0, 16384 bytes) ACPI-0100: *** Warning: Zero-length AML block in table [DSDT] ... # cat /proc/acpi/dsdt DSDT SGIDSDTSN2 Dmidecode did not show anything on RHEL 4. # dmidecode # dmidecode 2.2 There is no such problem on RHEL 5 Kernels, No logical to physical processor mapping available cpu_init: PAL max_purges is overridden to 1 PALO is required for multiple outsanding ptc.g ACPI: Local APIC address c0000000fee00000 register_intr: No IOSAPIC for GSI 52 4 CPUs available, 4 CPUs total ... SELinux: Initializing. SELinux: Starting in permissive mode selinux_register_security: Registering secondary module capability Capability LSM initialized as secondary Dentry cache hash table entries: 1048576 (order: 9, 8388608 bytes) Inode-cache hash table entries: 524288 (order: 8, 4194304 bytes) Mount-cache hash table entries: 1024 ACPI: Core revision 20060707 ... Version-Release number of selected component (if applicable): kernel-2.6.9-78.0.1.EL How reproducible: always on altix3 or altix4.rhts.bos.redhat.com.
Created attachment 317894 [details] Dmesg from altix4 with a RHEL 4.7.z Kernel
Created attachment 317895 [details] Dmesg from altix4 with a RHEL 5 Kernel
Assigning to gbeshers, SGI onsite partner engineer. P.
Hi George, do you have a chance to look at this issue? Let me know if you need any help like reservation of this machine.
SGI considers the error message harmless and lacks the engineering resources to fix it. Closing.