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x86: Increase CONFIG_NODES_SHIFT max to 10

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Some larger systems require more than 512 nodes, so increase the
maximum CONFIG_NODES_SHIFT to 10 for a new max of 1024 nodes.

This was tested with numa=fake=64M on systems with more than
64GB of RAM. A total of 1022 nodes were initialized.

Successfully builds with no additional warnings on x86_64
allyesconfig.

( No effect on any existing config. Newly enabled CONFIG_MAXSMP=y
  will see the new default. )

Signed-off-by: David Rientjes <rientjes@google.com>
LKML-Reference: <alpine.DEB.2.00.1003251538060.8589@chino.kir.corp.google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
David Rientjes 2010-03-25 15:39:27 -07:00 committed by Ingo Molnar
parent 042be38e61
commit 51591e31dc
1 changed files with 2 additions and 2 deletions
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arch/x86/Kconfig
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@ -1216,8 +1216,8 @@ config NUMA_EMU
config NODES_SHIFT
int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP
range 1 9
default "9" if MAXSMP
range 1 10
default "10" if MAXSMP
default "6" if X86_64
default "4" if X86_NUMAQ
default "3"