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| author |   Yinghai Lu <yinghai@kernel.org> | 2011-03-02 15:14:58 -0800 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2011-03-04 15:20:19 +0100 |
| commit | 3b28cf32cc32594710590685ee478f697ed4f328 (patch) | |
| tree | bd6e1e60481a2fe2520825fce80e265558d244f2 /arch | |
| parent | x86, build: Make sure mkpiggy fails on read error (diff) | |
| download | linux-dev-3b28cf32cc32594710590685ee478f697ed4f328.tar.xz linux-dev-3b28cf32cc32594710590685ee478f697ed4f328.zip | |
x86, numa: Fix numa_emulation code with memory-less node0
This crash happens on a system that does not have RAM on node0.
When numa_emulation is compiled in, and:
1. we boot the system without numa=fake...
2. or we boot the system with numa=fake=128 to make emulation fail
we will get:
[ 0.076025] ------------[ cut here ]------------
[ 0.080004] kernel BUG at arch/x86/mm/numa_64.c:788!
[ 0.080004] invalid opcode: 0000 [#1] SMP
[...]
need to use early_cpu_to_node() directly, because cpu_to_apicid
and apicid_to_node will return node0 that is not onlined.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: David Rientjes <rientjes@google.com>
LKML-Reference: <4D6ECF72.5010308@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/mm/numa_64.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c index 95ea1551eebc..1337c51b07d7 100644 --- a/arch/x86/mm/numa_64.c +++ b/arch/x86/mm/numa_64.c @@ -780,11 +780,7 @@ void __cpuinit numa_add_cpu(int cpu) int physnid; int nid = NUMA_NO_NODE; - apicid = early_per_cpu(x86_cpu_to_apicid, cpu); - if (apicid != BAD_APICID) - nid = apicid_to_node[apicid]; - if (nid == NUMA_NO_NODE) - nid = early_cpu_to_node(cpu); + nid = early_cpu_to_node(cpu); BUG_ON(nid == NUMA_NO_NODE || !node_online(nid)); /* |