diff options
| author |   Ashok Raj <ashok.raj@intel.com> | 2006-01-06 00:12:09 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-06 08:33:37 -0800 |
| commit | e72c8585e09f127a69a1608bb5ccd1e3fc0dd41e (patch) | |
| tree | 7ad1aae88ae4e9d7cd14899ad5a62ca3a6cdb0c7 /arch | |
| parent | [PATCH] x86: convert bigsmp to use flat physical mode (diff) | |
| download | linux-dev-e72c8585e09f127a69a1608bb5ccd1e3fc0dd41e.tar.xz linux-dev-e72c8585e09f127a69a1608bb5ccd1e3fc0dd41e.zip | |
[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: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/i386/kernel/mpparse.c | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/arch/i386/kernel/mpparse.c b/arch/i386/kernel/mpparse.c index 1ca5269b1e86..91a64016956e 100644 --- a/arch/i386/kernel/mpparse.c +++ b/arch/i386/kernel/mpparse.c @@ -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; } |