Commit-ID: 5da0ef9a8554a8d03dc880a53f213289fe7b576d
Gitweb: http://git.kernel.org/tip/5da0ef9a8554a8d03dc880a53f213289fe7b576d
Author: Tejun Heo <tj@xxxxxxxxxx>
AuthorDate: Mon, 11 Jul 2011 10:34:32 +0200
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Mon, 11 Jul 2011 16:25:30 +0200
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@xxxxxxx>
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
Cc: Conny Seidel <conny.seidel@xxxxxxx>
Link: http://lkml.kernel.org/r/20110711083432.GC943@xxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
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
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