diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/numa.h | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/setup.c | 1 | ||||
| -rw-r--r-- | arch/x86/mm/numa.c | 21 |
3 files changed, 24 insertions, 0 deletions
diff --git a/arch/x86/include/asm/numa.h b/arch/x86/include/asm/numa.h index 0aecc0b629e0..e3bae2b60a0d 100644 --- a/arch/x86/include/asm/numa.h +++ b/arch/x86/include/asm/numa.h @@ -63,12 +63,14 @@ extern void numa_clear_node(int cpu); extern void __init init_cpu_to_node(void); extern void numa_add_cpu(int cpu); extern void numa_remove_cpu(int cpu); +extern void init_gi_nodes(void); #else /* CONFIG_NUMA */ static inline void numa_set_node(int cpu, int node) { } static inline void numa_clear_node(int cpu) { } static inline void init_cpu_to_node(void) { } static inline void numa_add_cpu(int cpu) { } static inline void numa_remove_cpu(int cpu) { } +static inline void init_gi_nodes(void) { } #endif /* CONFIG_NUMA */ #ifdef CONFIG_DEBUG_PER_CPU_MAPS diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 210e878c4c0d..b16caee53bea 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -1199,6 +1199,7 @@ void __init setup_arch(char **cmdline_p) prefill_possible_map(); init_cpu_to_node(); + init_gi_nodes(); io_apic_init_mappings(); diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c index 9df94e0aaee1..44148691d78b 100644 --- a/arch/x86/mm/numa.c +++ b/arch/x86/mm/numa.c @@ -746,6 +746,27 @@ static void __init init_memory_less_node(int nid) } /* + * A node may exist which has one or more Generic Initiators but no CPUs and no + * memory. + * + * This function must be called after init_cpu_to_node(), to ensure that any + * memoryless CPU nodes have already been brought online, and before the + * node_data[nid] is needed for zone list setup in build_all_zonelists(). + * + * When this function is called, any nodes containing either memory and/or CPUs + * will already be online and there is no need to do anything extra, even if + * they also contain one or more Generic Initiators. + */ +void __init init_gi_nodes(void) +{ + int nid; + + for_each_node_state(nid, N_GENERIC_INITIATOR) + if (!node_online(nid)) + init_memory_less_node(nid); +} + +/* * Setup early cpu_to_node. * * Populate cpu_to_node[] only if x86_cpu_to_apicid[], |