diff options
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/smp.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 3a3e6bbab29c..917c8598cf61 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -1401,6 +1401,8 @@ int setup_profiling_timer(unsigned int multiplier) static void fixup_topology(void) { + int i; + #ifdef CONFIG_SCHED_SMT if (has_big_cores) { pr_info("Big cores detected but using small core scheduling\n"); @@ -1410,6 +1412,30 @@ static void fixup_topology(void) if (!has_coregroup_support()) powerpc_topology[mc_idx].mask = powerpc_topology[cache_idx].mask; + + /* + * Try to consolidate topology levels here instead of + * allowing scheduler to degenerate. + * - Dont consolidate if masks are different. + * - Dont consolidate if sd_flags exists and are different. + */ + for (i = 1; i <= die_idx; i++) { + if (powerpc_topology[i].mask != powerpc_topology[i - 1].mask) + continue; + + if (powerpc_topology[i].sd_flags && powerpc_topology[i - 1].sd_flags && + powerpc_topology[i].sd_flags != powerpc_topology[i - 1].sd_flags) + continue; + + if (!powerpc_topology[i - 1].sd_flags) + powerpc_topology[i - 1].sd_flags = powerpc_topology[i].sd_flags; + + powerpc_topology[i].mask = powerpc_topology[i + 1].mask; + powerpc_topology[i].sd_flags = powerpc_topology[i + 1].sd_flags; +#ifdef CONFIG_SCHED_DEBUG + powerpc_topology[i].name = powerpc_topology[i + 1].name; +#endif + } } void __init smp_cpus_done(unsigned int max_cpus) |