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authorRavikiran G Thirumalai <kiran@scalex86.org>2005-09-30 11:59:22 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-30 12:41:20 -0700
commit85cc5135ace4c8b75d7b4e1ea9fe15a7fcbd1516 (patch)
tree9b671671331c8da39dc2a9b75e3d34d79aeac86e
parente6a045a5b89037ae87c8c1bc84403f1d498e52a1 (diff)
[PATCH] x86_64 early numa init fix
The tests Alok carried out on Petr's box confirmed that cpu_to_node[BP] is not setup early enough by numa_init_array due to the x86_64 changes in 2.6.14-rc*, and unfortunately set wrongly by the work around code in numa_init_array(). cpu_to_node[0] gets set with 1 early and later gets set properly to 0 during identify_cpu() when all cpus are brought up, but confusing the numa slab in the process. Here is a quick fix for this. The right fix obviously is to have cpu_to_node[bsp] setup early for numa_init_array(). The following patch will fix the problem now, and the code can stay on even when cpu_to_node{BP] gets fixed early correctly. Thanks to Petr for access to his box. Signed off by: Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by: Alok N Kataria <alokk@calsoftinc.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--arch/x86_64/mm/numa.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/x86_64/mm/numa.c b/arch/x86_64/mm/numa.c
index 68ad75853510..214803821001 100644
--- a/arch/x86_64/mm/numa.c
+++ b/arch/x86_64/mm/numa.c
@@ -167,15 +167,14 @@ void __init numa_init_array(void)
mapping. To avoid this fill in the mapping for all possible
CPUs, as the number of CPUs is not known yet.
We round robin the existing nodes. */
- rr = 0;
+ rr = first_node(node_online_map);
for (i = 0; i < NR_CPUS; i++) {
if (cpu_to_node[i] != NUMA_NO_NODE)
continue;
+ cpu_to_node[i] = rr;
rr = next_node(rr, node_online_map);
if (rr == MAX_NUMNODES)
rr = first_node(node_online_map);
- cpu_to_node[i] = rr;
- rr++;
}
}