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Diffstat (limited to 'arch/x86/kernel/smpboot.c')
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 9320285a5e29..85f6e242b6b4 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -610,6 +610,9 @@ void set_cpu_sibling_map(int cpu) if (threads > __max_smt_threads) __max_smt_threads = threads; + for_each_cpu(i, topology_sibling_cpumask(cpu)) + cpu_data(i).smt_active = threads > 1; + /* * This needs a separate iteration over the cpus because we rely on all * topology_sibling_cpumask links to be set-up. @@ -1552,8 +1555,13 @@ static void remove_siblinginfo(int cpu) for_each_cpu(sibling, topology_die_cpumask(cpu)) cpumask_clear_cpu(cpu, topology_die_cpumask(sibling)); - for_each_cpu(sibling, topology_sibling_cpumask(cpu)) + + for_each_cpu(sibling, topology_sibling_cpumask(cpu)) { cpumask_clear_cpu(cpu, topology_sibling_cpumask(sibling)); + if (cpumask_weight(topology_sibling_cpumask(sibling)) == 1) + cpu_data(sibling).smt_active = false; + } + for_each_cpu(sibling, cpu_llc_shared_mask(cpu)) cpumask_clear_cpu(cpu, cpu_llc_shared_mask(sibling)); cpumask_clear(cpu_llc_shared_mask(cpu)); |