From: Ashok Raj Date: Tue, 14 Feb 2006 23:01:12 +0000 (-0800) Subject: [IA64] Count disabled cpus as potential hot-pluggable CPUs X-Git-Tag: v2.6.16-rc4~27^2~2^2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a6b14fa6fdc01ab3519c2729624f808677539b59;p=pandora-kernel.git [IA64] Count disabled cpus as potential hot-pluggable CPUs Have a facility to account for potentially hot-pluggable CPUs. ACPI doesnt give a determinstic method to find hot-pluggable CPUs. Hence we use 2 methods to assist. - BIOS can mark potentially hot-pluggable CPUs as disabled in the MADT tables. - User can specify the number of hot-pluggable CPUs via parameter additional_cpus=X The option is enabled only if ACPI_CONFIG_HOTPLUG_CPU=y which enables the physical hotplug option. Without which user can still use logical onlining and offlining of CPUs by enabling CONFIG_HOTPLUG_CPU=y Adds more bits to cpu_possible_map for potentially hot-pluggable cpus. Signed-off-by: Ashok Raj Signed-off-by: Tony Luck --- Reading git-diff-tree failed