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SubjectRE: 2.6.12-rc5 is broken in nvidia Ck804 Opteron MB/with dual cor e dual way
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andi,

in arch/x86_64/kernel/smboot.c, function detect_siblings(),

because smp_num_siblings is always =1, so several lines can be removed.

for_each_online_cpu (cpu) {
struct cpuinfo_x86 *c = cpu_data + cpu;
*R* int siblings = 0;
int i;
*R* if (smp_num_siblings > 1) {
*R* for_each_online_cpu (i) {
*R* if (cpu_core_id[cpu] == cpu_core_id[i]) {
*R* siblings++;
*R* cpu_set(i, cpu_sibling_map[cpu]);
*R* }
*R* }
*R* } else {
*R* siblings++;
cpu_set(cpu, cpu_sibling_map[cpu]);
*R* }


*R* if (siblings != smp_num_siblings) {
*R* printk(KERN_WARNING
*R* "WARNING: %d siblings found for CPU%d, should be %d\n",
*R* siblings, cpu, smp_num_siblings);
*R* smp_num_siblings = siblings;
*R* }

Also I found the workaround for hang on second node is
adding one line in setup.c
/* Low order bits define the core id (index of core in socket) */
cpu_core_id[cpu] = phys_proc_id[cpu] & ((1 << bits)-1);
/* Convert the APIC ID into the socket ID */
phys_proc_id[cpu] >>= bits;
+ printk(KERN_INFO " CPU %d(%d) phys_proc_id %d Core %d\n",
+ cpu, c->x86_num_cores, phys_proc_id[cpu], cpu_core_id[cpu]);

My compile environment SUSE 9.2 gcc version is 3.3.3???

YH

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