diff options
author | David Rientjes <rientjes@google.com> | 2010-01-20 15:10:47 -0500 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2010-01-23 00:21:57 -0500 |
commit | 3a5fc0e40cb467e692737bc798bc99773c81e1e2 (patch) | |
tree | 1b7563af83ac5b537b98fb35185ce9bb807e5a7d /arch/x86/mm/srat_64.c | |
parent | 92dcffb916d309aa01778bf8963a6932e4014d07 (diff) |
x86: Set hotpluggable nodes in nodes_possible_map
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>
Cc: <stable@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/mm/srat_64.c')
-rw-r--r-- | arch/x86/mm/srat_64.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c index a27124185fc1..28c68762648f 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) | |||
229 | printk(KERN_ERR "SRAT: Hotplug zone not continuous. Partly ignored\n"); | 229 | printk(KERN_ERR "SRAT: Hotplug zone not continuous. Partly ignored\n"); |
230 | } | 230 | } |
231 | 231 | ||
232 | if (changed) | 232 | if (changed) { |
233 | node_set(node, cpu_nodes_parsed); | ||
233 | printk(KERN_INFO "SRAT: hot plug zone found %Lx - %Lx\n", | 234 | printk(KERN_INFO "SRAT: hot plug zone found %Lx - %Lx\n", |
234 | nd->start, nd->end); | 235 | nd->start, nd->end); |
236 | } | ||
235 | } | 237 | } |
236 | 238 | ||
237 | /* Callback for parsing of the Proximity Domain <-> Memory Area mappings */ | 239 | /* Callback for parsing of the Proximity Domain <-> Memory Area mappings */ |