Commit 095adbb6 authored by Thomas Renninger's avatar Thomas Renninger Committed by Len Brown
Browse files

ACPI: Only count valid srat memory structures 

Otherwise you could run into:
WARN_ON in numa_register_memblks(), because node_possible_map is zero

References: https://bugzilla.novell.com/show_bug.cgi?id=757888



On this machine (ProLiant ML570 G3) the SRAT table contains:
  - No processor affinities
  - One memory affinity structure (which is set disabled)

CC: Per Jessen <per@opensuse.org>
CC: Andi Kleen <andi@firstfloor.org>
Signed-off-by: default avatarThomas Renninger <trenn@suse.de>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent f3946fb6

arch/ia64/kernel/acpi.c

+3 −2
Original line number Diff line number Diff line
@@ -497,7 +497,7 @@ acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa) 
	srat_num_cpus++;

}



void __init

int __init

acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)

{

	unsigned long paddr, size;
@@ -512,7 +512,7 @@ acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma) 


	/* Ignore disabled entries */

	if (!(ma->flags & ACPI_SRAT_MEM_ENABLED))

		return;

		return -1;



	/* record this node in proximity bitmap */

	pxm_bit_set(pxm);
@@ -531,6 +531,7 @@ acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma) 
	p->size = size;

	p->nid = pxm;

	num_node_memblks++;

	return 0;

}



void __init acpi_numa_arch_fixup(void)

arch/x86/mm/srat.c

+8 −7
Original line number Diff line number Diff line
@@ -142,23 +142,23 @@ static inline int save_add_info(void) {return 0;} 
#endif



/* Callback for parsing of the Proximity Domain <-> Memory Area mappings */

void __init

int __init

acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)

{

	u64 start, end;

	int node, pxm;



	if (srat_disabled())

		return;

		return -1;

	if (ma->header.length != sizeof(struct acpi_srat_mem_affinity)) {

		bad_srat();

		return;

		return -1;

	}

	if ((ma->flags & ACPI_SRAT_MEM_ENABLED) == 0)

		return;

		return -1;



	if ((ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) && !save_add_info())

		return;

		return -1;

	start = ma->base_address;

	end = start + ma->length;

	pxm = ma->proximity_domain;
@@ -168,12 +168,12 @@ acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma) 
	if (node < 0) {

		printk(KERN_ERR "SRAT: Too many proximity domains.\n");

		bad_srat();

		return;

		return -1;

	}



	if (numa_add_memblk(node, start, end) < 0) {

		bad_srat();

		return;

		return -1;

	}



	node_set(node, numa_nodes_parsed);
@@ -181,6 +181,7 @@ acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma) 
	printk(KERN_INFO "SRAT: Node %u PXM %u [mem %#010Lx-%#010Lx]\n",

	       node, pxm,

	       (unsigned long long) start, (unsigned long long) end - 1);

	return 0;

}



void __init acpi_numa_arch_fixup(void) {}

drivers/acpi/numa.c

+5 −3
Original line number Diff line number Diff line
@@ -237,6 +237,8 @@ acpi_parse_processor_affinity(struct acpi_subtable_header *header, 
	return 0;

}



static int __initdata parsed_numa_memblks;



static int __init

acpi_parse_memory_affinity(struct acpi_subtable_header * header,

			   const unsigned long end)
@@ -250,8 +252,8 @@ acpi_parse_memory_affinity(struct acpi_subtable_header * header, 
	acpi_table_print_srat_entry(header);



	/* let architecture-dependent part to do it */

	acpi_numa_memory_affinity_init(memory_affinity);



	if (!acpi_numa_memory_affinity_init(memory_affinity))

		parsed_numa_memblks++;

	return 0;

}
@@ -306,7 +308,7 @@ int __init acpi_numa_init(void) 


	if (cnt < 0)

		return cnt;

	else if (cnt == 0)

	else if (!parsed_numa_memblks)

		return -ENOENT;

	return 0;

}

include/linux/acpi.h

+1 −1
Original line number Diff line number Diff line
@@ -96,7 +96,7 @@ void acpi_table_print_madt_entry (struct acpi_subtable_header *madt); 
void acpi_numa_slit_init (struct acpi_table_slit *slit);

void acpi_numa_processor_affinity_init (struct acpi_srat_cpu_affinity *pa);

void acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa);

void acpi_numa_memory_affinity_init (struct acpi_srat_mem_affinity *ma);

int acpi_numa_memory_affinity_init (struct acpi_srat_mem_affinity *ma);

void acpi_numa_arch_fixup(void);



#ifdef CONFIG_ACPI_HOTPLUG_CPU

CRA Git | Maintained and supported by SUSTech CRA and CCSE