Commit e72c8585 authored by Ashok Raj's avatar Ashok Raj Committed by Linus Torvalds
Browse files

[PATCH] make bigsmp the default mode if CONFIG_HOTPLUG_CPU



If we are using hotplug enabled kernel, then make bigsmp the default mode.
Signed-off-by: default avatarAshok Raj <ashok.raj@intel.com>
Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 1855a2c4
......@@ -38,6 +38,12 @@
int smp_found_config;
unsigned int __initdata maxcpus = NR_CPUS;
#ifdef CONFIG_HOTPLUG_CPU
#define CPU_HOTPLUG_ENABLED (1)
#else
#define CPU_HOTPLUG_ENABLED (0)
#endif
/*
* Various Linux-internal data structures created from the
* MP-table.
......@@ -219,14 +225,18 @@ static void __devinit MP_processor_info (struct mpc_config_processor *m)
cpu_set(num_processors, cpu_possible_map);
num_processors++;
if ((num_processors > 8) &&
((APIC_XAPIC(ver) &&
(boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)) ||
(boot_cpu_data.x86_vendor == X86_VENDOR_AMD)))
def_to_bigsmp = 1;
else
def_to_bigsmp = 0;
if (CPU_HOTPLUG_ENABLED || (num_processors > 8)) {
switch (boot_cpu_data.x86_vendor) {
case X86_VENDOR_INTEL:
if (!APIC_XAPIC(ver)) {
def_to_bigsmp = 0;
break;
}
/* If P4 and above fall through */
case X86_VENDOR_AMD:
def_to_bigsmp = 1;
}
}
bios_cpu_apicid[num_processors - 1] = m->mpc_apicid;
}
......
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