diff options
| author | Siddha, Suresh B <suresh.b.siddha@intel.com> | 2005-11-05 17:25:54 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-14 19:55:16 -0800 |
| commit | 94605eff572b727aaad9b4b29bc358b919096503 (patch) | |
| tree | 657a848d8ef34d2f94bbad3aa4e5458d2d3f2d2b /arch/i386/kernel/cpu/intel_cacheinfo.c | |
| parent | e90f22edf432512219cc2952f5811961abbd164f (diff) | |
[PATCH] x86-64/i386: Intel HT, Multi core detection fixes
Fields obtained through cpuid vector 0x1(ebx[16:23]) and
vector 0x4(eax[14:25], eax[26:31]) indicate the maximum values and might not
always be the same as what is available and what OS sees. So make sure
"siblings" and "cpu cores" values in /proc/cpuinfo reflect the values as seen
by OS instead of what cpuid instruction says. This will also fix the buggy BIOS
cases (for example where cpuid on a single core cpu says there are "2" siblings,
even when HT is disabled in the BIOS.
http://bugzilla.kernel.org/show_bug.cgi?id=4359)
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/kernel/cpu/intel_cacheinfo.c')
| -rw-r--r-- | arch/i386/kernel/cpu/intel_cacheinfo.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/i386/kernel/cpu/intel_cacheinfo.c b/arch/i386/kernel/cpu/intel_cacheinfo.c index 4dc42a189ae..e66d1409956 100644 --- a/arch/i386/kernel/cpu/intel_cacheinfo.c +++ b/arch/i386/kernel/cpu/intel_cacheinfo.c @@ -307,7 +307,7 @@ static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index) #ifdef CONFIG_X86_HT else if (num_threads_sharing == smp_num_siblings) this_leaf->shared_cpu_map = cpu_sibling_map[cpu]; - else if (num_threads_sharing == (c->x86_num_cores * smp_num_siblings)) + else if (num_threads_sharing == (c->x86_max_cores * smp_num_siblings)) this_leaf->shared_cpu_map = cpu_core_map[cpu]; else printk(KERN_DEBUG "Number of CPUs sharing cache didn't match " |