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| author | David Rientjes <rientjes@google.com> | 2010-01-20 12:10:47 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-02-09 04:50:43 -0800 |
| commit | b5b39c3961de96c8c82e2642f2174b3c41cb4327 (patch) | |
| tree | c44f6b5ba3bc4d3182be7123947934cded5ce9a8 | |
| parent | 76e789c066a7d65c180e916c0d74227fbe3e0b05 (diff) | |
| download | linux-ak78xx-b5b39c3961de96c8c82e2642f2174b3c41cb4327.tar.gz | |
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>
| -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 dbb5381f7b3..3871c600c4f 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 */ |