Messages in this thread Patch in this message | | | Date | Mon, 11 Jul 2011 10:34:32 +0200 | From | Tejun Heo <> | Subject | [PATCH x86/urgent] x86: Disable AMD_NUMA for 32bit for now |
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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
Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Hans Rosenfeld <hans.rosenfeld@amd.com> --- arch/x86/Kconfig | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index da34972..37357a5 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 -- 1.7.6
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