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| author |   Andi Kleen <ak@suse.de> | 2006-02-03 21:51:17 +0100 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-02-04 16:43:14 -0800 |
| commit | 9391a3f9c7f17bdd82adf9a98905450642cc8970 (patch) | |
| tree | b3bba1689a0af3233a5d055e43ec5a67a8e775f0 /arch | |
| parent | [PATCH] x86_64: Fix memory policy build without CONFIG_HUGETLBFS (diff) | |
| download | linux-dev-9391a3f9c7f17bdd82adf9a98905450642cc8970.tar.xz linux-dev-9391a3f9c7f17bdd82adf9a98905450642cc8970.zip | |
[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')
| -rw-r--r-- | arch/x86_64/mm/srat.c | 26 |
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; |