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authorLinus Torvalds <torvalds@linux-foundation.org>2016-10-03 13:39:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-03 13:39:00 -0700
commitaf79ad2b1f337a00aa150b993635b10bc68dc842 (patch)
tree06abe1d9735b27a449443d7d29a9801f690080be /arch/x86/kernel
parente606d81d2d9596ab2b4fd0dc052eea0485b7e8c2 (diff)
parent447976ef4fd09b1be88b316d1a81553f1aa7cd07 (diff)
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler changes from Ingo Molnar: "The main changes are: - irqtime accounting cleanups and enhancements. (Frederic Weisbecker) - schedstat debugging enhancements, make it more broadly runtime available. (Josh Poimboeuf) - More work on asymmetric topology/capacity scheduling. (Morten Rasmussen) - sched/wait fixes and cleanups. (Oleg Nesterov) - PELT (per entity load tracking) improvements. (Peter Zijlstra) - Rewrite and enhance select_idle_siblings(). (Peter Zijlstra) - sched/numa enhancements/fixes (Rik van Riel) - sched/cputime scalability improvements (Stanislaw Gruszka) - Load calculation arithmetics fixes. (Dietmar Eggemann) - sched/deadline enhancements (Tommaso Cucinotta) - Fix utilization accounting when switching to the SCHED_NORMAL policy. (Vincent Guittot) - ... plus misc cleanups and enhancements" * 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (64 commits) sched/irqtime: Consolidate irqtime flushing code sched/irqtime: Consolidate accounting synchronization with u64_stats API u64_stats: Introduce IRQs disabled helpers sched/irqtime: Remove needless IRQs disablement on kcpustat update sched/irqtime: No need for preempt-safe accessors sched/fair: Fix min_vruntime tracking sched/debug: Add SCHED_WARN_ON() sched/core: Fix set_user_nice() sched/fair: Introduce set_curr_task() helper sched/core, ia64: Rename set_curr_task() sched/core: Fix incorrect utilization accounting when switching to fair class sched/core: Optimize SCHED_SMT sched/core: Rewrite and improve select_idle_siblings() sched/core: Replace sd_busy/nr_busy_cpus with sched_domain_shared sched/core: Introduce 'struct sched_domain_shared' sched/core: Restructure destroy_sched_domain() sched/core: Remove unused @cpu argument from destroy_sched_domain*() sched/wait: Introduce init_wait_entry() sched/wait: Avoid abort_exclusive_wait() in __wait_on_bit_lock() sched/wait: Avoid abort_exclusive_wait() in ___wait_event() ...
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/smpboot.c46
1 files changed, 30 insertions, 16 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 4296beb8fdd3..7137ec4eea9a 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -471,7 +471,7 @@ static bool match_die(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)
return false;
}
-static struct sched_domain_topology_level numa_inside_package_topology[] = {
+static struct sched_domain_topology_level x86_numa_in_package_topology[] = {
#ifdef CONFIG_SCHED_SMT
{ cpu_smt_mask, cpu_smt_flags, SD_INIT_NAME(SMT) },
#endif
@@ -480,22 +480,23 @@ static struct sched_domain_topology_level numa_inside_package_topology[] = {
#endif
{ NULL, },
};
+
+static struct sched_domain_topology_level x86_topology[] = {
+#ifdef CONFIG_SCHED_SMT
+ { cpu_smt_mask, cpu_smt_flags, SD_INIT_NAME(SMT) },
+#endif
+#ifdef CONFIG_SCHED_MC
+ { cpu_coregroup_mask, cpu_core_flags, SD_INIT_NAME(MC) },
+#endif
+ { cpu_cpu_mask, SD_INIT_NAME(DIE) },
+ { NULL, },
+};
+
/*
- * set_sched_topology() sets the topology internal to a CPU. The
- * NUMA topologies are layered on top of it to build the full
- * system topology.
- *
- * If NUMA nodes are observed to occur within a CPU package, this
- * function should be called. It forces the sched domain code to
- * only use the SMT level for the CPU portion of the topology.
- * This essentially falls back to relying on NUMA information
- * from the SRAT table to describe the entire system topology
- * (except for hyperthreads).
+ * Set if a package/die has multiple NUMA nodes inside.
+ * AMD Magny-Cours and Intel Cluster-on-Die have this.
*/
-static void primarily_use_numa_for_topology(void)
-{
- set_sched_topology(numa_inside_package_topology);
-}
+static bool x86_has_numa_in_package;
void set_cpu_sibling_map(int cpu)
{
@@ -558,7 +559,7 @@ void set_cpu_sibling_map(int cpu)
c->booted_cores = cpu_data(i).booted_cores;
}
if (match_die(c, o) && !topology_same_node(c, o))
- primarily_use_numa_for_topology();
+ x86_has_numa_in_package = true;
}
threads = cpumask_weight(topology_sibling_cpumask(cpu));
@@ -1304,6 +1305,16 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
zalloc_cpumask_var(&per_cpu(cpu_core_map, i), GFP_KERNEL);
zalloc_cpumask_var(&per_cpu(cpu_llc_shared_map, i), GFP_KERNEL);
}
+
+ /*
+ * Set 'default' x86 topology, this matches default_topology() in that
+ * it has NUMA nodes as a topology level. See also
+ * native_smp_cpus_done().
+ *
+ * Must be done before set_cpus_sibling_map() is ran.
+ */
+ set_sched_topology(x86_topology);
+
set_cpu_sibling_map(0);
switch (smp_sanity_check(max_cpus)) {
@@ -1370,6 +1381,9 @@ void __init native_smp_cpus_done(unsigned int max_cpus)
{
pr_debug("Boot done\n");
+ if (x86_has_numa_in_package)
+ set_sched_topology(x86_numa_in_package_topology);
+
nmi_selftest();
impress_friends();
setup_ioapic_dest();