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[PATCH] x86: fix smp_num_siblings on buggy BIOSes

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This fixes 'smp_num_siblings' value on the systems with a buggy bios,
which sets number of siblings to '2' even when HT is disabled.  (more
details are at http://bugzilla.kernel.org/show_bug.cgi?id=4359)

I am planning to do more cleanup in this area (like moving smp_num_siblings
to per cpuinfo) shortly.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Siddha, Suresh B 2005-05-27 12:53:01 -07:00 committed by Linus Torvalds
parent b60c1f6ffd
commit 49f384b82b
1 changed files with 3 additions and 1 deletions
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4
arch/i386/kernel/smpboot.c
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@ -1074,8 +1074,10 @@ static void __init smp_boot_cpus(unsigned int max_cpus)
cpu_set(cpu, cpu_sibling_map[cpu]);
}
if (siblings != smp_num_siblings)
if (siblings != smp_num_siblings) {
printk(KERN_WARNING "WARNING: %d siblings found for CPU%d, should be %d\n", siblings, cpu, smp_num_siblings);
smp_num_siblings = siblings;
}
if (c->x86_num_cores > 1) {
for (i = 0; i < NR_CPUS; i++) {