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authorAndi Kleen <ak@suse.de>2006-02-03 21:51:17 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-04 16:43:14 -0800
commit9391a3f9c7f17bdd82adf9a98905450642cc8970 (patch)
treeb3bba1689a0af3233a5d055e43ec5a67a8e775f0 /arch/x86_64
parent00ac59adfca8f2f339beb0b67054e786c275553e (diff)
[PATCH] x86_64: Clear more state when ignoring empty node in SRAT parsing
Might fix boot failures on systems with empty PXMs in SRAT Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64')
-rw-r--r--arch/x86_64/mm/srat.c26
1 files changed, 20 insertions, 6 deletions
diff --git a/arch/x86_64/mm/srat.c b/arch/x86_64/mm/srat.c
index 8b7f85608fa8..3bd827f5611f 100644
--- a/arch/x86_64/mm/srat.c
+++ b/arch/x86_64/mm/srat.c
@@ -26,6 +26,10 @@ static nodemask_t nodes_found __initdata;
static struct node nodes[MAX_NUMNODES] __initdata;
static u8 pxm2node[256] = { [0 ... 255] = 0xff };
+/* Too small nodes confuse the VM badly. Usually they result
+ from BIOS bugs. */
+#define NODE_MIN_SIZE (4*1024*1024)
+
static int node_to_pxm(int n);
int pxm_to_node(int pxm)
@@ -223,6 +227,16 @@ static int nodes_cover_memory(void)
return 1;
}
+static void unparse_node(int node)
+{
+ int i;
+ node_clear(node, nodes_parsed);
+ for (i = 0; i < MAX_LOCAL_APIC; i++) {
+ if (apicid_to_node[i] == node)
+ apicid_to_node[i] = NUMA_NO_NODE;
+ }
+}
+
void __init acpi_numa_arch_fixup(void) {}
/* Use the information discovered above to actually set up the nodes. */
@@ -230,16 +244,16 @@ int __init acpi_scan_nodes(unsigned long start, unsigned long end)
{
int i;
- if (acpi_numa <= 0)
- return -1;
-
/* First clean up the node list */
- for_each_node_mask(i, nodes_parsed) {
+ for (i = 0; i < MAX_NUMNODES; i++) {
cutoff_node(i, start, end);
- if (nodes[i].start == nodes[i].end)
- node_clear(i, nodes_parsed);
+ if ((nodes[i].end - nodes[i].start) < NODE_MIN_SIZE)
+ unparse_node(i);
}
+ if (acpi_numa <= 0)
+ return -1;
+
if (!nodes_cover_memory()) {
bad_srat();
return -1;