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authorTejun Heo <tj@kernel.org>2011-07-11 10:34:32 +0200
committerIngo Molnar <mingo@elte.hu>2011-07-11 16:25:30 +0200
commit5da0ef9a8554a8d03dc880a53f213289fe7b576d (patch)
tree7d850978af6df99be39c16d281835a4bd49b1102 /Documentation/x86
parente3bbfa78bab125f58b831b5f7f45b5a305091d72 (diff)
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>
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