path: root/arch
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authorDavid Rientjes <rientjes@google.com>2010-01-20 12:10:47 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2010-02-09 04:50:43 -0800
commitb5b39c3961de96c8c82e2642f2174b3c41cb4327 (patch)
treec44f6b5ba3bc4d3182be7123947934cded5ce9a8 /arch
parent76e789c066a7d65c180e916c0d74227fbe3e0b05 (diff)
x86: Set hotpluggable nodes in nodes_possible_map
commit 3a5fc0e40cb467e692737bc798bc99773c81e1e2 upstream. nodes_possible_map does not currently include nodes that have SRAT entries that are all ACPI_SRAT_MEM_HOT_PLUGGABLE since the bit is cleared in nodes_parsed if it does not have an online address range. Unequivocally setting the bit in nodes_parsed is insufficient since existing code, such as acpi_get_nodes(), assumes all nodes in the map have online address ranges. In fact, all code using nodes_parsed assumes such nodes represent an address range of online memory. nodes_possible_map is created by unioning nodes_parsed and cpu_nodes_parsed; the former represents nodes with online memory and the latter represents memoryless nodes. We now set the bit for hotpluggable nodes in cpu_nodes_parsed so that it also gets set in nodes_possible_map. [ hpa: Haicheng Li points out that this makes the naming of the variable cpu_nodes_parsed somewhat counterintuitive. However, leave it as is in the interest of keeping the pure bug fix patch small. ] Signed-off-by: David Rientjes <rientjes@google.com> Tested-by: Haicheng Li <haicheng.li@linux.intel.com> LKML-Reference: <alpine.DEB.2.00.1001201152040.30528@chino.kir.corp.google.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch')
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index dbb5381f7b3b..3871c600c4f3 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -229,9 +229,11 @@ update_nodes_add(int node, unsigned long start, unsigned long end)
printk(KERN_ERR "SRAT: Hotplug zone not continuous. Partly ignored\n");
- if (changed)
+ if (changed) {
+ node_set(node, cpu_nodes_parsed);
printk(KERN_INFO "SRAT: hot plug zone found %Lx - %Lx\n",
nd->start, nd->end);
+ }
/* Callback for parsing of the Proximity Domain <-> Memory Area mappings */