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| author | Tejun Heo <tj@kernel.org> | 2011-07-11 10:34:32 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-07-11 16:25:30 +0200 |
| commit | 5da0ef9a8554a8d03dc880a53f213289fe7b576d (patch) | |
| tree | 7d850978af6df99be39c16d281835a4bd49b1102 /arch | |
| parent | e3bbfa78bab125f58b831b5f7f45b5a305091d72 (diff) | |
| download | lwn-5da0ef9a8554a8d03dc880a53f213289fe7b576d.tar.gz lwn-5da0ef9a8554a8d03dc880a53f213289fe7b576d.zip | |
x86: Disable AMD_NUMA for 32bit for now
Commit 2706a0bf7b ("x86, NUMA: Enable CONFIG_AMD_NUMA on 32bit
too") enabled AMD NUMA for 32bit too. Unfortunately, SPARSEMEM
on 32bit had rather coarse (512MiB) addr->node mapping
granularity due to lack of space in page->flags. This led to
boot failure on certain AMD NUMA machines which had 128MiB
alignment on nodes.
Patches to properly detect this condition and reject NUMA
configuration are posted[1] but deemed too pervasive for merge
at this point (-rc6). Disable AMD NUMA for 32bit for now and
re-enable once the detection logic is merged.
[1] http://thread.gmane.org/gmane.linux.kernel/1161279/focus=1162583
Reported-by: Hans Rosenfeld <hans.rosenfeld@amd.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Conny Seidel <conny.seidel@amd.com>
Link: http://lkml.kernel.org/r/20110711083432.GC943@htj.dyndns.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index da349723d411..37357a599dca 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1170,7 +1170,7 @@ comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI" config AMD_NUMA def_bool y prompt "Old style AMD Opteron NUMA detection" - depends on NUMA && PCI + depends on X86_64 && NUMA && PCI ---help--- Enable AMD NUMA node topology detection. You should say Y here if you have a multi processor AMD system. This uses an old method to |